PHP: getimagesize

getimagesize

php at cNO_SOLICITATIONbreak dot org
18-May-2006 01:49


Apparently appending $attr in the <img ...> tag will not render the image at all or render only a portion of the image under Safari and IE under certain circumstances.



I haven't figured out the exact circumstances, but I'm using XHTML 1.0 Transitional DTD, and the circumstances seem to depend on the rendering order of the page. The problem is due to the width="..." attribute in general, not the height="..." attribute.



To fix the problem, forget the $attr attribute and stick with the stylesheet:



  <?php list($w, $h) = getimagesize("image.jpg") ?>

  <img src="image.jpg" style="width: <?php=$w?>px; height: <?php=$h?>px;" />

egingell at sisna dot com
06-May-2006 03:14


<?



// These constants are used by image_info(), below.

define ('IMAGE_WIDTH', 'width');

define ('IMAGE_HEIGHT', 'height');

define ('IMAGE_TYPE', 'type');

define ('IMAGE_ATTR', 'attr');

define ('IMAGE_BITS', 'bits');

define ('IMAGE_CHANNELS', 'channels');

define ('IMAGE_MIME', 'mime');



/**

 * mixed image_info( file $file [, string $out] )

 *

 * Returns information about $file.

 *

 * If the second argument is supplied, a string representing that information will be returned.

 *

 * Valid values for the second argument are IMAGE_WIDTH, 'width', IMAGE_HEIGHT, 'height', IMAGE_TYPE, 'type',

 * IMAGE_ATTR, 'attr', IMAGE_BITS, 'bits', IMAGE_CHANNELS, 'channels', IMAGE_MIME, and 'mime'.

 *

 * If only the first argument is supplied an array containing all the information is returned,

 * which will look like the following:

 *

 *    [width] => int (width),

 *    [height] => int (height),

 *    [type] => string (type),

 *    [attr] => string (attributes formatted for IMG tags),

 *    [bits] => int (bits),

 *    [channels] => int (channels),

 *    [mime] => string (mime-type)

 *

 * Returns false if $file is not a file, no arguments are supplied, $file is not an image, or otherwise fails.

 *

 **/

function image_info($file = null, $out = null) {



    // If $file is not supplied or is not a file, warn the user and return false.

    if (is_null($file) || !is_file($file)) {

        echo '<p><b>Warning:</b> image_info() => first argument must be a file.</p>';

        return false;

    }



    // Defines the keys we want instead of 0, 1, 2, 3, 'bits', 'channels', and 'mime'.

    $redefine_keys = array(

        'width',

        'height',

        'type',

        'attr',

        'bits',

        'channels',

        'mime',

    );



    // If $out is supplied, but is not a valid key, nullify it.

    if (!is_null($out) && !in_array($out, $redefine_keys)) $out = null;



    // Assign usefull values for the third index.

    $types = array(

        1 => 'GIF',

        2 => 'JPG',

        3 => 'PNG',

        4 => 'SWF',

        5 => 'PSD',

        6 => 'BMP',

        7 => 'TIFF(intel byte order)',

        8 => 'TIFF(motorola byte order)',

        9 => 'JPC',

        10 => 'JP2',

        11 => 'JPX',

        12 => 'JB2',

        13 => 'SWC',

        14 => 'IFF',

        15 => 'WBMP',

        16 => 'XBM'

    );

    $temp = array();

    $data = array();



    // Get the image info using getimagesize().

    // If $temp fails to populate, warn the user and return false.

    if (!$temp = getimagesize($file)) {

        echo '<p><b>Warning:</b> image_info() => first argument must be an image.</p>';

        return false;

    }



    // Get the values returned by getimagesize()

    $temp = array_values($temp);



    // Make an array using values from $redefine_keys as keys and values from $temp as values.

    foreach ($temp AS $k => $v) {

        $data[$redefine_keys[$k]] = $v;

    }



    // Make 'type' usefull.

    $data['type'] = $types[$data['type']];



    // Return the desired information.

    return !is_null($out) ? $data[$out] : $data;    

}



?>

Russell Chappell
31-Mar-2006 07:01


For those of you who are confused about what the mime type IE displays image/pjpeg and other browsers image/jpeg and are building in checks for all of your scripts to tell the difference i would suggest using the getimagesize() mime results which will always be image/jpeg regardless what browser you use.



<?php

$info = getimagesize("image.jpg");

foreach($info as $key => $value) {

    echo $key . ' - ' . $value . '<br />';

}

?>



Where it says mime always is image/jpeg

mail AT sascha MINUS diebel DOt de
22-Feb-2006 06:55


Note that with JPG images, two extra indexes are returned: channels and bits. channels will be 3 for RGB pictures and 4 for CMYK pictures. bits is the number of bits for each color.



Bei JPG Bildern werden 2 zus�tzliche Paramter zur�ckgegeben: "channels" und "bits". "channels" steht f�r die Anzahl der Farbkan�le (bei RGB = 3, bei CMYK = 4). "bits" gibt die Anzahl der Bits je Farbe zur�ck (Standard 8 bit)

snaprage at iinet dot net dot au
14-Feb-2006 05:04


john, helpful indeed

I used:



function getFileSizeW($filePath){

$blah = getimagesize($filePath);

$type = $blah['mime'];

$width = $blah[0];

return $width;}



function getFileSizeH($filePath){

$blah = getimagesize($filePath);

$type = $blah['mime'];

$height = $blah[1];

return $height;}



$sizeW = getFileSizeW($file);

$sizeH = getFileSizeH($file);



the info is gathered from using $_POST[''] as its entered by the user.

This may be helpful for somebody...

John
05-Feb-2006 11:57


I was coming here to see if there was a simple way to get the height, width, and mime type of an image I have uploaded and while I thought the following code would work because it is printed above

<?php

list($width, $height, $type, $attr) = getimagesize("img/flag.jpg");

?>



it didnt when I tried to echo out $type; so heres my fix, there may be a better way but it works for me!



<?php

$blah = getimagesize("folder/file.gif");

$type = $blah['mime'];

$width = $blah[0];

$height = $blah[1];

?>



and then you can just echo out one of the variables about to get whichever you would desire.

gormozus at yahoo dot com
15-Nov-2005 10:56


getimagesize() seems to cache the results, so if you resize an image (using the methods described earlier) and you want to re-read its width and height, use imagesx() and imagesy() to get the actual information.

webmaster at WWW.ELLESSEWEB.NET
26-Oct-2005 05:10


This is a useful function to display a thumbnail of a whatever image.

This piece of code has been lightly modified from an example found on <b>NYPHP.ORG</B>.

This function can build a thumbnail of any size you want and display it on your browser!

Hope it can be useful for you guys!



<?php



function makeThumbnail($o_file, $t_ht = 100) {

    $image_info = getImageSize($o_file) ; // see EXIF for faster way

    

    switch ($image_info['mime']) {

        case 'image/gif':

            if (imagetypes() & IMG_GIF)  { // not the same as IMAGETYPE

                $o_im = imageCreateFromGIF($o_file) ;

            } else {

                $ermsg = 'GIF images are not supported<br />';

            }

            break;

        case 'image/jpeg':

            if (imagetypes() & IMG_JPG)  {

                $o_im = imageCreateFromJPEG($o_file) ;

            } else {

                $ermsg = 'JPEG images are not supported<br />';

            }

            break;

        case 'image/png':

            if (imagetypes() & IMG_PNG)  {

                $o_im = imageCreateFromPNG($o_file) ;

            } else {

                $ermsg = 'PNG images are not supported<br />';

            }

            break;

        case 'image/wbmp':

            if (imagetypes() & IMG_WBMP)  {

                $o_im = imageCreateFromWBMP($o_file) ;

            } else {

                $ermsg = 'WBMP images are not supported<br />';

            }

            break;

        default:

            $ermsg = $image_info['mime'].' images are not supported<br />';

            break;

    }

    

    if (!isset($ermsg)) {

        $o_wd = imagesx($o_im) ;

        $o_ht = imagesy($o_im) ;

        // thumbnail width = target * original width / original height

        $t_wd = round($o_wd * $t_ht / $o_ht) ; 



        $t_im = imageCreateTrueColor($t_wd,$t_ht);

        

        imageCopyResampled($t_im, $o_im, 0, 0, 0, 0, $t_wd, $t_ht, $o_wd, $o_ht);

        

        imageJPEG($t_im);

        

        imageDestroy($o_im);

        imageDestroy($t_im);

    }

    return isset($ermsg)?$ermsg:NULL;

}

?>



Here the code to call the function:



<?



header("Content-type: image/jpeg");

makeThumbnail("http://it2.php.net/images/php.gif", 300);



?>

Mark at Mild Peril
13-Oct-2005 04:54


To solve the problem with using absolute site filepaths, as experienced by Brian:



$size = getimagesize($_SERVER["DOCUMENT_ROOT"].$file);



(where $file is something like "/rootdir/graphics/photo.jpg")

cvig at raw-io dot com
29-Sep-2005 06:06


This function does not work to catch corrupted PNG images. The alternative is to use ImageMagick's identify tool. Due to some sort of odd output usage the output from ImageMagick's identify won't be returned but you can use the return value from the program to test if a PNG file is valid:



#!/usr/bin/php

<?php



if (! $argv[1])

        exit("$argv[0] filename.png\n");



$result = 0;

$tmp;

exec("identify $argv[1]", $tmp, $result);

if($result)

{

        echo "Corrupted image\n";

        return FALSE;   // corrupt PNG file

}

else

{

        echo "Valid image\n";

        return TRUE;

}



?>

paul at goldenbakery dot nl
05-Aug-2005 02:02


Note that the canvas of a Flash movie can not be empty for getimagesize() to read the dimensions of an SWF. Not sure if this is a bug, a feature or just a limitation of the SWF format.



Flash version does not seem to matter. Also tested with Flash 8 beta.

Sean
30-May-2005 10:23


I needed a quick way to make a group of images uniformly sized, but only on one page.  So creating a new set of thumbnails was overdoing the whole thing.  I made up this script that seems to do the trick.



<?php

     $image =  "absolute/path/to/image/image.jpg";                

     $size = getimagesize("$image");

       $height = $size[1];

       $width = $size[0];

     if ($height > 150)

          {

               $height = 150;

               $percent = ($size[1] / $height);

               $width = ($size[0] / $percent);

          }

     else if ($width > 150)

          {

               $width = 150;

               $percent = ($size[0] / $width);

               $height = ($size[1] / $percent);

          }

     echo "<img src\"image/path/image.jpg\" height=\"$height\" width=\"$width\" />";

?>

irregular at inbox dot ru
30-Apr-2005 04:24


I've wrote this piece of useful code.

May be it will be useful for you.

But i got a problem - if source image is in the area with need of authorization then the functions that read some files from that place (i.e. getimagesize, imagejpeg) does not work!

How to solve it?



<?php

//i't a stand-alone file named resize.php

//the feature is caching

// /image/thumbcache folder is used with file name forming by md5($img.$calc_width.$calc_height);

//it gets such parameters:

//img - image address (URL)

//w - optional width

//h - optional height

//if you set either w or h, then the image is resized proportionaly, according to the source

//if you set neither w nor h then the script just output file

//if you set both w or h then the image will be resized exactly how you want



    $server_root = 'http://'.$_SERVER['SERVER_NAME'].'/';



    if (isset($_GET['img']) && ((isset($_GET['w']) || isset($_GET['h'])))

    {

        $img = substr($_GET['img'],0,100);

        if (isset($_GET['w'])) $w = substr($_GET['w'],0,10);

        if (isset($_GET['h'])) $h = substr($_GET['h'],0,10);



        error_reporting(0);



        //check cache

        $hash = md5($img.$w.$h);

        $pos = strrpos($img,".");

        $ext = substr($img,$pos+1,strlen($img)-$pos);

        $fname = $hash.'.'.$ext;

        $cachedim = @imagecreatefromjpeg($serverroot.'images/thumbcache/'.$fname);

        if ($cachedim) //just show cached thumbnail

        {

            header("Content-type: image/jpeg");

            imagejpeg($cachedim,'',100);

        }

        else //create and cache thumbnail and show it 'cause it's not in cache

        {

            list($width, $height, $type, $attr) = getimagesize($img);

            if ($type==2) //jpeg

            {

                $im = @imagecreatefromjpeg($img); /* Attempt to open */

                if (!$im) { /* See if it failed */

            $im  = imagecreate(150, 30); /* Create a blank image */

                    $bgc = imagecolorallocate($im, 255, 255, 255);

                    $tc  = imagecolorallocate($im, 0, 0, 0);

                    imagefilledrectangle($im, 0, 0, 150, 30, $bgc);

                    imagestring($im, 1, 5, 5, "Error loading image!", $tc);

                }

                else

                {

                    //constrain proportions if needed

                    if (isset($w)){ if ($w==0) $w = $width; }

                    else $w = $width*$h/$height;



                    if (isset($h)){ if ($h==0) $h = $height; }

                    else $h = $height*$w/$width;



                    $dstw=isset($w)?$w:$width;

                    $dsth=isset($h)?$h:$height;

                    $tim = imagecreatetruecolor($dstw,$dsth);

            

            imagecopyresampled($tim,$im,0,0,0,0,$dstw,$dsth,$width,$height);

                    

                    header("Content-type: image/jpeg");

                    imagejpeg($tim,'./images/thumbcache/'.$fname,100);

                    imagejpeg($tim,'',100);

                }

            }

        }

        error_reporting(E_ALL);

    }



?>

ajreading at classixshop dot com
21-Apr-2005 01:30


A simple piece of code i wrote to proportionally resize an image to a max height and width then display it



<?php

// Max height and width

$max_width = 100;

$max_height = 100;



// Path to your jpeg



$upfile '/path/to/file.jpg';

    Header("Content-type: image/jpeg");

    

    $size = GetImageSize($upfile); // Read the size

          $width = $size[0];

          $height = $size[1];

          

          // Proportionally resize the image to the

          // max sizes specified above

          

          $x_ratio = $max_width / $width;

          $y_ratio = $max_height / $height;



          if( ($width <= $max_width) && ($height <= $max_height) )

          {

               $tn_width = $width;

               $tn_height = $height;

          }

          elseif (($x_ratio * $height) < $max_height)

          {

               $tn_height = ceil($x_ratio * $height);

               $tn_width = $max_width;

          }

          else

          {

               $tn_width = ceil($y_ratio * $width);

               $tn_height = $max_height;

          }

     // Increase memory limit to support larger files

     

     ini_set('memory_limit', '32M');

     

     // Create the new image!

     $src = ImageCreateFromJpeg($upfile);

     $dst = ImageCreateTrueColor($tn_width, $tn_height);

     ImageCopyResized($dst, $src, 0, 0, 0, 0, $tn_width, $tn_height, $width, $height);

     ImageJpeg($dst);

// Destroy the images

ImageDestroy($src);

ImageDestroy($dst);

?>

mail at soylentgreens dot com
30-Mar-2005 06:37


How about this for cropping images...



<?php



$imgfile = "img.jpg";

$cropStartX = 300;

$cropStartY = 250;

$cropW   = 200;

$cropH   = 200;



// Create two images

$origimg = imagecreatefromjpeg($imgfile);

$cropimg = imagecreatetruecolor($cropW,$cropH);



// Get the original size

list($width, $height) = getimagesize($imgfile);



// Crop

imagecopyresized($cropimg, $origimg, 0, 0, $cropStartX, $cropStartY, $width, $height, $width, $height);



// TODO: write code to save new image

// or, just display it like this:

header("Content-type: image/jpeg");

imagejpeg($cropimg);



// destroy the images

imagedestroy($cropimg);

imagedestroy($origimg);



?>

Coodiss at w3bbix dot net
15-Mar-2005 09:51


Heres a easy way to scale images to the <td> that they are in

*this is broken up so anyone can understand it :)



<?

$imageinfo = getimagesize("images/picture.jpg");

          

$ix=$imageinfo[0];

$iy=$imageinfo[1];



$widthscale = $ix/175;  //<TD> WIDTH

$heightscale = $iy/175; //<TD> HEIGHT



if($widthscale < 1)

$nwidth = $ix*$widthscale;

else

$nwidth = $ix/$widthscale;



if($heightscale < 1)

$nheight = $iy*$heightscale;

else

$nheight = $iy/$heightscale;



?>

php dot net at dannysauer dot com
12-Feb-2005 08:23


Note that, if you're going to be a good programmer and use named constatnts (IMAGETYPE_JPEG) rather than their values (2), you want to use the IMAGETYPE variants - IMAGETYPE_JPEG, IMAGETYPE GIF, IMAGETYPE_PNG, etc.  For some reason, somebody made a horrible decision, and IMG_PNG is actually 4 in my version of PHP, while IMAGETYPE_PNG is 3.  It took me a while to figure out why comparing the type against IMG_PNG was failing...

hu dot php dot net at benjamin dot hu
04-Jan-2005 09:06


Flash compressed format SWF:



Array

(

    [0] => 468

    [1] => 60

    [2] => 13

    [3] => width="468" height="60"

    [mime] => application/x-shockwave-flash

)



[2] : SWC = SWF-compressed value 13

sixzero4 at hotmail dot com
29-Nov-2004 08:33


This is just to add to the comment by robertks at hotmail dot com on 

05-Mar-2003 12:12 regarding trying to derive the dimensions of a video file. The package referenced (http://www.getid3.org/) had been updated, and below is a script I use to get the size. You can get many other attributes of media files as well.



<?php

// include getID3() library (can be in a different directory if full path is specified)

 include_once('getid3.php');

 

// Initialize getID3 engine

$getID3 = new getID3;



 // File to get info from

 $file_location = './your/path/to/file.mov';



// Get information from the file

 $fileinfo = $getID3->analyze($file_location);

 getid3_lib::CopyTagsToComments($fileinfo);

 

 // Output results

if (!empty($fileinfo['video']['resolution_x'])) { echo '<p> video width: '.$fileinfo['video']['resolution_x'].'</p>'; }

if (!empty($fileinfo['video']['resolution_y'])) { echo '<p> video height: '.$fileinfo['video']['resolution_y'].'</p>'; }

?>



Hope that helps others looking for a function similar to getimagesize() for a video or media file.

nonick AT 8027 DOT org
16-Nov-2004 02:46


To: webmaster at theotherpixel dot com



  I think the problem is that getimagesize() expects a valid path into the filesystem, so most probably you should use something like:



  $ret = getimagesize('/home/whoever/public_html/images/filename');



of course, using the route which applies to your setup: '/usr/www/', whatever.

________

Miguel.

Geoff Vane
13-Nov-2004 10:39


WARNING:



I couldn't get getimagesize() to work when using certain arrays.

The solution was simple but easily overlooked:



When using an array and/or a .txt file,

to store & extract an image filename,

which getimagesize() should examine,

an almost unnoticable and unwanted space can exist !!!

(at the end of the string..)



Use rtrim($yourfilenamestring) to get rid of the space

that will block your getimagesize() operation.



example: 



$a = getimagesize(rtrim($yourfilenamestring) ) ;



$a[0] will contain the width

$a[1] will contain the height



:)

Joshua
16-Aug-2004 12:26


If your image name has spaces in it you will need to use rawurlencode() and NOT urlencode() as this function (at least in 4.3.4) does not accept spaces as + signs.

cstdenis at hotmail dot com
11-Aug-2004 11:42


This will not work for swf files unless zlib is compiled into php statically (not as a shared module). Bug #29611



As of PHP 5.0.0 it will just return false, but that should change to a notice by the next release.

ryan at vitalmodels dot com
05-Jun-2004 01:06


--- Editor's Note:


It's easier to call on urlencode() or rawurlencode() to "fix" urls containing spaces and other characters that normally not well-liked.


--- 





You may have noticed that images with spaces WONT work with getimagesize - some of us have massive amounts of pictures, or don't feel like rewriting file names on users uploaded pictures- so here is a super fast fix that will replace the spaces once the image is called and will work with getimagesize flawlessly-





$image_new = "/pictures/$pic[picture]";  //PICTURE URL


$image_new = str_replace(' ','%20',$image_new); //REPLACE THE SPACES





Now you just call $image_new using getimagesize and you wont' have anymore problems.





On my site I take uploaded pictures from users - then resize them if they are over a certain width, here is the script i use if anyone would like to do this-





$image_new = "/pictures/$pic[picture]"; //url of picture


$image_new = str_replace(' ','%20',$image_new); //take url and replace spaces


$max_width= "480";  //maximum width allowed for pictures


$resize_width= "480";  //same as max width


$size = getimagesize("$image_new");    //get the actual size of the picture


$width= $size[0];           // get width of picture


$height= $size[1];   // get height of picture


if ($width>$max_width){


            $new_width=$resize_width;  // Resize Image If over max width


}else {


            $new_width=$width;       // Keep original size from array because smaller than max





}





echo "<IMG src=\"$image_new\" border=1  width=$new_width>"   //print image with new width





Hope this helps anyone who wants some simple uses for getimagesize- check out my website to see it in action- vitalmodels.com

diablx at hotmail dot com
25-May-2004 02:36


I'm sorry for they other scripts, but I made one mistake about the image resizing... here is a working script !

<?

    // Some configuration variables !

    $maxWidth = 90;

    $maxHeight = 90;

    $maxCols = 8;

    $webDir = "https://localhost/images/";

    $localDir = $_SERVER['DOCUMENT_ROOT']."/images/";



    $AutorisedImageType = array ("jpg", "jpeg", "gif", "png");

?>



<center>

<table border='1' cellspacing='5' cellpadding='5' style="border-collapse:collapse; border-style: dotted">

<tr>

   <?

   // Open localDir

   $dh = opendir($localDir);

   while (false !== ($filename = readdir($dh))) {

       $filesArray[] = $filename;

   }



   // Display and resize

   foreach ($filesArray as $images) {

   

       $ext = substr($images, strpos($images, ".")+1, strlen($images));

       

       if( in_array($ext, $AutorisedImageType) ) {



           list($width, $height, $type, $attr) = @getimagesize( $localDir.$images );



            $xRatio = $maxWidth / $width; 

            $yRatio = $maxHeight / $height; 

            

            if ( ($width <= $maxWidth) && ($height <= $maxHeight) ) { 

              $newWidth = $width; 

              $newHeight = $height; 

            } 

            else if (($xRatio * $height) < $maxHeight) { 

              $newHeight = ceil($xRatio * $height); 

              $newWidth = $maxWidth; 

            } 

            else { 

              $newWidth = ceil($yRatio * $width); 

              $newHeight = $maxHeight; 

            } 

           

           if($i == $maxCols) {

               echo "</tr><tr>";

               $i = 0;

           }

           echo "<td align='center' valign='middle' width='$maxWidth' height='$maxHeight'><img src='".$webDir.$images."' width='$newWidth' height='$newHeight'></td>";

           $i++;

       }

   }

?>

</tr>

</table>

</center>

MagicalTux at FF.st
31-Mar-2004 03:35


simm posted something interesting about imagick, but usually calling an external binary is not the best way.



You can use the Imagick PHP module . With it, you do not even need to get the image size to generate thubnails...



Here's the code I used :

<?php

    $imh=imagick_readimage($image);

    imagick_scale($imh,GALLERY_THUMBNAILWIDTH,GALLERY_THUMBNAILHEIGHT);

    imagick_writeimage($imh,$image_thumb);

?>



(I noticed that some hosting companies are now providing the imagick module by default. Using it allows you to accept any type of image from your visitors. Maybe it will be documented on the official PHP website one day or another? )

MarioPro
10-Mar-2004 06:13


The Problem:

I've just noticed that after upgrading to the PHP 4.3.4 version, the old GetImageSize() should get your attention on pages coded before this new version.



The solutions:

So, if you used GetImageSize(), you should now be using getimagesize() - attention to all lower caracters.



Also, you shou certify that the image realy exists, otherwhise you'll get the following error: getimagesize(): Read error!

This means that there is no image to "fill" the string and thus you're calling, for example: "images/news/" instead of calling "images/news/03102004a.jpg"



One should now verify if there is an image to be called (example):

if($photo1!=""){

$size1=getimagesize("images/news/".$photo_news_1"]);

$width1=$size1[0];

$height1=$size[1];

}

Here, if $photo_news_1 is set and exists it will be displayed, otherwhise it will be skiped and no ERROR message will be displayed. In the PHP 4.3.3 and earlier versions, this was not necessary but it is now!  ;)

yohami dot com - zerodj at hotmail dot com
14-Jan-2004 07:11


A cool resize / cropping script for creating thumbnails using mogrify



IMAGETEST.PHP



<?php 



include 'mogrify.php';



// variables from flash (my website uses flash and php)

$picture="sample.jpg";

$fixedwidth=300;

$fixedheight=240;

//



cropimage($picture,$fixedwidth,$fixedheight,$mogrify);



 ?>



MOGRIFY.PHP



<?php 

// walking the path

$mogrify="C:/apache/Imagik/mogrify.exe";



// ---------------------------------------- crop function



function cropimage($picture,$fixedwidth,$fixedheight,$mogrify) {



    // GET IMG

    $img = imagecreatefromjpeg($picture);

    $width= imagesx($img);

    $height= imagesy($img);

    // CROP WIDTH 

    if($width!=$fixedwidth){

        $ratio =$fixedwidth/$width;

        $NewHeight=round($height*$ratio);

        $NewWidth=round($width*$ratio);

        exec( $mogrify." -resize ".$NewWidth."x".$NewHeight."! $picture");

        exec( $mogrify." -crop ".$fixedwidth."x".$fixedheight."+0+0 $picture");

        // REFRESH

        $img = imagecreatefromjpeg($picture);

        $width= imagesx($img);

        $height= imagesy($img);

    }

    // CROP HEIGHT

    if($height!=$fixedheight){

        $ratio =$fixedheight/$height;

        $NewHeight=round($height*$ratio);

        $NewWidth=round($width*$ratio);

        exec( $mogrify." -resize ".$NewWidth."x".$NewHeight."! $picture");

        exec( $mogrify." -crop ".$fixedwidth."x".$fixedheight."+0+0 $picture");

    }

    //

    ImageDestroy($img);

}



?>



yeah!

php (at) thejpster org uk
01-Dec-2003 06:39


If you want to resize an image proportionally to fit within a given area, like I did, the following code might help you out.



If either hscale or wscale are greater than 1 then that dimension is too big. If you then scale your image by the larger of the two values (hscale, wscale) then you guarantee that both dimensions will now fit in your specified area :)



function makeImg($num) {

    global $hmax, $wmax; // max width and height

    $image = "somefile.jpg";

    list($width, $height, $type, $attr) = getimagesize($image);

    $hscale = $height / $hmax;

    $wscale = $width / $wmax;

    if (($hscale > 1) || ($wscale > 1)) {

        $scale = ($hscale > $wscale)?$hscale:$wscale;

    } else {

        $scale = 1;

    }

    $newwidth = floor($width / $scale);

    $newheight= floor($height / $scale);



    return "<img width='$newwidth' height='$newheight' src='$image'><br>$image: $newwidth x $newheight : $width x $height";

}

djwishbone at hotmail dot com
18-Nov-2003 06:31


Using remote files with getimagesize($URL) never worked for me.  Except when I would grab files from the same server.  However, I developed some code with the help from the people here that does work.  If you are having problems give this function a shot:



function getimagesize_remote($image_url) {

    $handle = fopen ($image_url, "rb");

    $contents = "";

    if ($handle) {

    do {

        $count += 1;

        $data = fread($handle, 8192);

        if (strlen($data) == 0) {

            break;

       }

    $contents .= $data;

    } while(true);

    } else { return false; }

    fclose ($handle);



    $im = ImageCreateFromString($contents);

    if (!$im) { return false; }

    $gis[0] = ImageSX($im);

    $gis[1] = ImageSY($im);

// array member 3 is used below to keep with current getimagesize standards

    $gis[3] = "width={$gis[0]} height={$gis[1]}";

    ImageDestroy($im);

    return $gis;

}



goodluck

janoma_cl
09-Oct-2003 03:19


If you want to show thumbnails keeping the original proportions, with defined maximum width and height, you can use this function. This is useful when showing tables of user-uploaded images, that not necessarily are same-sized. However, for big images (like wallpapers), a better option is to create separated thumbnails with a image-editing software.



If the image is smaller or equal than the defined maximums, then it's showed without resizing. If not, creates a link to a pop-up that shows the full-size image.



<?php

function show_thumbnail($file)

{

    $max = 200 // Max. thumbnail width and height



    $size = getimagesize($file);



    if ( $size[0] <= $max && $size[1] <= $max )

    {

        $ret = '<img src="'.$file.'" '.$size[3].' border="0">';

    }

    else

    {

        $k = ( $size[0] >= $size[1] ) ? $size[0] / $max : $size[1] / $max;

        $ret = '<a href="javascript:;" onClick="window.open(\'image.php?img=';

        $ret .= $file.'\',\'\',\'width='.$size[0];

        $ret .= ',height='.$size[1].'\')">';

        $ret .= '<img src="'.$file.'" width="'.floor($size[0]/$k).'" height="'.floor($size[1]/$k).'" border="0" alt="View full-size image"></a>';

    }



    return $ret;

}

?>



Here is the code of 'image.php':



<html>

<head>

<title>Image</title>

</head>

<body leftmargin="0" topmargin="0">

<?php echo ( is_file($_GET['img']) ) ? '<a href="#" onClick="window.close();"><img src="'.$_GET['img'].'" border="0" alt="Close window"></a>' : 'Invalid image filename, or no filename entered. <a href="#" onClick="window.close();">Close window</a>.' ?>

</body>

</html>

simms
03-Sep-2003 09:47


here's a nice way of resizing user-uploaded files on the fly, using ImageMagick (on linux), but no GD: 



<?



if( $image_info = getimagesize( "/upload_dir/" . $uploadName ) )

{

  if( $image_info[ 0 ] > $defaultImgWidth )

  {

    exec( "mogrify -geometry " . $defaultImgWidth . " " . "/upload_dir/" . $uploadName . " &" );

  }

}



?>



$defaultImgWidth would be the target width of the image -- note that the code above resizes the image without distorting its original proportions, and only if it is wider than $defaultImgWidth.

the ImageMagick syntax used above ("mogrify ..") overwrites the original file ($uploadName) with the resized image.

ten tod xmg ta rotanimrev (reverse it)
01-Sep-2003 10:30


An additional note to "tightcode_nosp@m_hotmail":



If that doesn't work try this instead:



<?

      $img = imagecreatefromjpeg ($filename);

      $x = imagesx ($img);

      $y = imagesy ($img);

      imagedestroy ($img);

?>



Though keep in mind that this consumes lots of CPU. So if you're doing something like creating a page of thumbnails this is considerably slower.



So what you can do is use getimagesize() and check if

- the width and height are empty strings ("")

- and those two values aren't too high



Both indicate that getimagesize() didn't work properly. The latter may happen if getimagesize() thought that it recognized the format and therefore the size properly. I mean if you're looking at pictures that you know are max. 1024x768 and getimagesize() returns a width of e.g. 20234 then it's obvious that something went wrong. In that case use the code mentioned above. Of course if getimagesize() returned small values that are wrong you still get the wrong size. So check your pictures and priorities first.



So all of this could look like as follows:



<?

    $picinfo = @getimagesize ($filename);

    if ($picinfo !== false) {

      $x = $picinfo [0];

      $y = $picinfo [1];

    }



    // change this according the picture resolutions you're expecting

    if ($x > 2000 || $y > 2000) $x = $y = "";



    if ($x == "") {

      $img = imagecreatefromjpeg ($filename);

      $x = imagesx ($img);

      $y = imagesy ($img);

      imagedestroy ($img);

    }

?>



Note: fix syntax stuff if there's an error as I compiled this example from a few places.



If you don't care about the huge load on your CPU or you have to rely on the proper size use the snippet noted at the beginning only.

justin at webtekconcepts dot com
15-Aug-2003 01:27


For those that like to go the dynamic thumbnail route, I've found that you can get warnings with getimagesize() after your loop through more than 3 to 4 images. In my case I needed 12 images on each page.



Use usleep() in your loop just before you run getimagesize() otherwise you'll end up with warnings, big images and a broken page. Using usleep() lets the server recoup for X milliseconds so it will accept connections again for the image size. 



I've found that usleep(1500) is the best for my situation. This barely slows the page down and allows for getimagesize() to work 100% of the time for me.

webmaster AT theparadox DOT org
30-May-2003 05:16


I figured others have wanted to scale an image to a particular height or width while preserving the height/width ratio. So here are the functions I wrote to accomplish this. Hopefully they'll save somebody else the five minutes it took to write these.



You give the filename and the dimension you want to use, and these functions return the opposite dimension:



function scale_to_height ($filename, $targetheight) {

   $size = getimagesize($filename);

   $targetwidth = $targetheight * ($size[0] / $size[1]);

   return $targetwidth;

}

          

function scale_to_width ($filename, $targetwidth) {

   $size = getimagesize($filename);

   $targetheight = $targetwidth * ($size[1] / $size[0]);

   return $targetheight;

}

robertks at hotmail dot com
05-Mar-2003 09:12


For those of you trying to derive the dimensions of a video file (e.g. Video for Windows AVI, Quicktime MOV, MPEG MPG, Windows Media Video WMV or ASF, etc.), you will find the getid3 library to be indispensible.  Found at http://getid3.sourceforge.net, here's an example of its use in a script:



include_once('getid3.php'); // or wherever you actually put the getid3 scripts

$file_location = './myvideo.avi';

$file_info = GetAllFileInfo($file_location) // calls getid3 function

$file_width = $file_info['video']['resolution_x'];

$file_height = $file_info['video']['resolution_y'];



You can then use your OBJECT and EMBED tags in HTML to put the video into a web page, and make the PHP template independent of the size parameters of the particular video it happens to be loading.  (Just remember to add pixels to the video height to accomodate the controller of the embedded player: typically, 16 pixels for Quicktime, 46 pixels for Windows Media Player 6, and 64 pixels for Windows Media Player 7.

mogster at boomdesign dot no
09-Mar-2002 10:58


Really useful info from webmasterb@feartheclown.com and you others :-)

Saved my butt...

Here's a build on that, with proportional resizing of the image-upload ($newpic) to a fixed value ($maxwidth):

$maxwidth = "350";

$imagehw = GetImageSize($newpic);

$imagewidth = $imagehw[0];

$imageheight = $imagehw[1];

$imgorig = $imagewidth;

if ($imagewidth > $maxwidth {

  $imageprop=($maxwidth*100)/$imagewidth;

  $imagevsize= ($imageheight*$imageprop)/100 ;

  $imagewidth=$maxwidth; 

  $imageheight=ceil($imagevsize);

}

Of course this does not resize the image itself, but returns values one may use in html-code to restrain users from killing your design...



knutm

getimagesize

Description