|
|
 |
split (PHP 3, PHP 4, PHP 5) split -- Split string into array by regular expression Descriptionarray split ( string pattern, string string [, int limit] ) Подсказка:
preg_split(), which uses a Perl-compatible regular
expression syntax, is often a faster alternative to
split(). If you don't require the power of regular
expressions, it is faster to use explode(), which
doesn't incur the overhead of the regular expression engine.
Returns an array of strings, each of which is a substring of
string formed by splitting it on
boundaries formed by the case-sensitive regular expression
pattern. If limit
is set, the returned array will contain a maximum of
limit elements with the last element
containing the whole rest of string. If
an error occurs, split() returns FALSE.
To split off the first four fields from a line from
/etc/passwd:
Пример 1. split() example |
<?php
list($user, $pass, $uid, $gid, $extra) =
split(":", $passwd_line, 5);
?>
|
|
If there are n occurrences of
pattern, the returned array will contain
n+1 items. For example, if
there is no occurrence of pattern, an array with
only one element will be returned. Of course, this is also true if
string is empty.
To parse a date which may be delimited with slashes, dots, or
hyphens:
Пример 2. split() example |
<?php
$date = "04/30/1973";
list($month, $day, $year) = split('[/.-]', $date);
echo "Month: $month; Day: $day; Year: $year<br />\n";
?>
|
|
For users looking for a way to emulate Perl's @chars =
split('', $str) behaviour, please see the examples for
preg_split().
Please note that pattern is a regular
expression. If you want to split on any of the characters which
are considered special by regular expressions, you'll need to
escape them first. If you think split() (or
any other regex function, for that matter) is doing something
weird, please read the file regex.7,
included in the regex/ subdirectory of the
PHP distribution. It's in manpage format, so you'll want to do
something along the lines of man
/usr/local/src/regex/regex.7 in order to read it.
See also: preg_split(), spliti(),
explode(), implode(),
chunk_split(), and wordwrap().
split
destes at ix dot netcom dot com
14-Feb-2006 12:15
Some corrections to robin-at-teddyb's CSV splitting function. Recall that the point of this is to properly implement a split() function that handles data exported to CSV, where data containing commas gets quote-delimited.
* Problem 1: As jh-at-junetz pointed out, the +1 in robin's nonquoted splitting command mistakenly adds an extra element to the resulting array.
* Problem 2: If consecutive fields are quote-delimited, the remaining "separator" between them only contains one delimiter and no actual fields - so an extra element gets added to the parsed array.
* Problem 3: When double-quotes appear in a spreadsheet exported to CSV, they get escaped by doubling them, i.e. a data field reading "this is a test of a "special" case" gets written to CSV as, "this is a test of a ""special"" case". These quotes are also interpreted as top-level delimiters and (mistakenly) add extra array elements to the output.
I have hacked a conversion of "" to a single quote ( ' ), but a truly clever preg_split for the top-level splitter (instead of the explode) might preserve the original doubled "s without bugging up the top-level parsing. i.e., a smarter man than I could solve the problem rather than avoiding it by replacing the bad data.
(current) Solution:
<?php
function quotesplit( $splitter=',', $s, $restore_quotes=0 ) {
$s = str_replace('""', "'", $s);
$getstrings = explode('"', $splitter.$s.$splitter);
$delimlen = strlen($splitter);
$instring = 0;
while (list($arg, $val) = each($getstrings)) {
if ($instring==1) {
if( $restore_quotes ) {
$result[count($result)-1] = $result[count($result)-1].'"'.$val.'"';
} else {
$result[] = $val;
}
$instring = 0;
} else {
if ((strlen($val)-$delimlen-$delimlen) >= 1) {
$temparray = split($splitter, substr($val, $delimlen, strlen($val)-$delimlen-$delimlen ) );
while(list($iarg, $ival) = each($temparray)) {
$result[] = trim($ival);
}
}
$instring = 1;
}
}
return $result;
}
?>
RE: gcerretini at technica dot net /UTF8
08-Feb-2006 04:26
Original problem:
=================
I've try using split function.
<?php
$ferro="2�12";
$valore=split("[�]",$ferro);
echo $ferro."<br>";
echo "p1-".$valore[0]."<br>";
echo "p2-".$valore[1]."<br>";
echo "p3-".$valore[2]."<br>";
$ferro="2d12";
$valore=split("[d]",$ferro);
echo $ferro."<br>";
echo "p1-".$valore[0]."<br>";
echo "p2-".$valore[1]."<br>";
echo "p3-".$valore[2]."<br>";
?>
This return:
============
2�12
p1-2
p2-
p3-12
2d12
p1-2
p2-12
p3-
I use charset UTF-8. When I use char � the split function ad an empty string between "2" and "12"... Why?
Explanation:
============
UTF-8 charset codes some characters (like the "�" character) into two bytes. In fact the regular expresion "[�]" contains 4 bytes (4 non-unicode characters). To demonstrate the real situation I wrote following example:
$ferro="2de12";
$valore=split("[de]",$ferro);
echo $ferro."<br>";
echo "p1-".$valore[0]."<br>";
echo "p2-".$valore[1]."<br>";
echo "p3-".$valore[2]."<br>";
This returns:
=============
2d12
p1-2
p2-
p3-12
gcerretini at technica dot net
27-Jan-2006 10:46
I've try using split function.
<?PHP
$ferro="212";
$valore=split("[]",$ferro);
echo $ferro."<br>";
echo "p1-".$valore[0]."<br>";
echo "p2-".$valore[1]."<br>";
echo "p3-".$valore[2]."<br>";
$ferro="2d12";
$valore=split("[d]",$ferro);
echo $ferro."<br>";
echo "p1-".$valore[0]."<br>";
echo "p2-".$valore[1]."<br>";
echo "p3-".$valore[2]."<br>";
?>
This return:
212
p1-2
p2-
p3-12
2d12
p1-2
p2-12
p3-
I use charset UTF-8
When I use char the split function ad an empty string between "2" and "12" Why?
shimon at schoolportal dot co dot il
26-Dec-2005 12:34
<?
function splitslash($split,$str,$esc='\\\\')
{
$o=explode($split,$str);
$oc=count($o);
$a=array();
for($i=0;$i<$oc;$i++)
{
$o2=explode($esc.$esc,$o[$i]);
$o2c=count($o2);
if($o2[$o2c-1][strlen($o2[$o2c-1])-1]==$esc)
{
$o2[$o2c-1]=substr($o2[$o2c-1],0,-1);
if($i+1<$oc)
{
$o[$i+1]=join($esc.$esc,$o2).$split.$o[$i+1];
}
else
{
$a[]=join($esc,$o2); }
}
else
{
$a[]=join($esc,$o2);
}
}
return $a;
}
$r=splitslash("NA","mooNAmooNAma\\\\ma\\NA");
print_r($r);
?>
04-Dec-2005 05:57
Be advised
$arr = split("x", "x" );
print_r($arr);
will output:
Array
(
[0] =>
[1] =>
)
That is it will catch 2 empty strings on each side of the delimiter.
franz at fholzinger dot com
04-Nov-2005 04:34
The example from ramkumar rajendran did not work.
$line = split("/\n", $input_several_lines_long);
I do not know why this does not work for me.
The following has worked for me to get a maximum of 2 array parts separated by the first new line (independant if saved under UNIX or WINDOWS):
$line = preg_split('/[\n\r]+/',$input_several_lines_long,2);
Also empty lines are not considered here.
passtschu AT freenet DOT de
24-Sep-2005 12:09
divide a string with a template. the "template dividers" are the keys for the output array.
<?PHP
function string2array ($string, $template){
preg_match_all ("|%(.+)%|U", $template, $template_matches);
$template = preg_replace ("|%(.+)%|U", "(.+)", $template);
preg_match ("|" . $template . "|", $string, $string_matches);
foreach ($template_matches[1] as $key => $value){
$output[$value] = $string_matches[($key + 1)];
}
return $output;
}
$string1 = 'www.something.com 66.196.91.121 - - [01/Sep/2005:04:20:39 +0200] "GET /robots.txt HTTP/1.0" 200 49 "-"';
$string2= '%Domain% %IP% - %User% \[%Date%:%Time% %TimeZone%\] "%Method% %Request% %Protocol%" %ServerCode% %Bytes% "%Referer%"';
print_r (string2array ($string1, $string2));
?>
jh at junetz dot de
03-Jul-2005 09:34
robin: Nice function, saved my day. The +1 at the end of split / substr is wrong, though.
robin at teddyb dot org
29-Jun-2005 09:01
Actually, this version is better than the last I submitted. The goal here is to be able to engage in *multiple* delimeter removal passes; for all but the last pass, set the third value to "1", and everything should go well.
function quotesplit( $splitter=',', $s, $restore_quotes=0 )
{
//First step is to split it up into the bits that are surrounded by quotes
//and the bits that aren't. Adding the delimiter to the ends simplifies
//the logic further down
$getstrings = explode('"', $splitter.$s.$splitter);
//$instring toggles so we know if we are in a quoted string or not
$delimlen = strlen($splitter);
$instring = 0;
while (list($arg, $val) = each($getstrings))
{
if ($instring==1)
{
if( $restore_quotes )
{
//Add the whole string, untouched to the previous value in the array
$result[count($result)-1] = $result[count($result)-1].'"'.$val.'"';
} else {
//Add the whole string, untouched to the array
$result[] = $val;
}
$instring = 0;
}
else
{
//Break up the string according to the delimiter character
//Each string has extraneous delimiters around it (inc the ones we added
//above), so they need to be stripped off
$temparray = split($splitter, substr($val, $delimlen, strlen($val)-$delimlen-$delimlen+1 ) );
while(list($iarg, $ival) = each($temparray))
{
$result[] = trim($ival);
}
$instring = 1;
}
}
return $result;
}
robin at teddyb dot org
29-Jun-2005 08:50
wchris's quotesplit assumes that anything that is quoted must also be a complete delimiter-seperated entry by itself. This version does not. It also uses split's argument order.
function quotesplit( $splitter=',', $s )
{
//First step is to split it up into the bits that are surrounded by quotes
//and the bits that aren't. Adding the delimiter to the ends simplifies
//the logic further down
$getstrings = explode('"', $splitter.$s.$splitter);
//$instring toggles so we know if we are in a quoted string or not
$delimlen = strlen($splitter);
$instring = 0;
while (list($arg, $val) = each($getstrings))
{
if ($instring==1)
{
//Add the whole string, untouched to the previous value in the array
$result[count($result)-1] = $result[count($result)-1].$val;
$instring = 0;
}
else
{
//Break up the string according to the delimiter character
//Each string has extraneous delimiters around it (inc the ones we added
//above), so they need to be stripped off
$temparray = split($splitter, substr($val, $delimlen, strlen($val)-$delimlen-$delimlen+1 ) );
while(list($iarg, $ival) = each($temparray))
{
$result[] = trim($ival);
}
$instring = 1;
}
}
return $result;
}
wchris
18-Feb-2005 03:53
moritz's quotesplit didn't work for me. It seemed to split on a comma even though it was between a pair of quotes. However, this did work:
function quotesplit($s, $splitter=',')
{
//First step is to split it up into the bits that are surrounded by quotes and the bits that aren't. Adding the delimiter to the ends simplifies the logic further down
$getstrings = split('\"', $splitter.$s.$splitter);
//$instring toggles so we know if we are in a quoted string or not
$delimlen = strlen($splitter);
$instring = 0;
while (list($arg, $val) = each($getstrings))
{
if ($instring==1)
{
//Add the whole string, untouched to the result array.
$result[] = $val;
$instring = 0;
}
else
{
//Break up the string according to the delimiter character
//Each string has extraneous delimiters around it (inc the ones we added above), so they need to be stripped off
$temparray = split($splitter, substr($val, $delimlen, strlen($val)-$delimlen-$delimlen ) );
while(list($iarg, $ival) = each($temparray))
{
$result[] = trim($ival);
}
$instring = 1;
}
}
return $result;
}
ramkumar rajendran
17-Jan-2005 10:09
A correction to a earlier note
If you want to use split to check on line feeds (\n), the following won't work:
$line = split("\n", $input_several_lines_long);
You really have to do this instead, notice the second slash:
$line = split("/\n", $input_several_lines_long);
Took me a little while to figure to do
claes at dot2me.com
03-Nov-2004 04:10
Though this is obvious, the manual is a bit incorrect when claiming that the return will always be 1+number of time the split pattern occures. If the split pattern is the first part of the string, the return will still be 1. E.g.
$a = split("zz," "zzxsj.com");
count($a);
=> 1.
The return of this can not in anyway be seperated from the return where the split pattern is not found.
moritz
09-Apr-2004 11:54
Often you want to split CSV-Like data, so this is the function for this :)
It splits data formatted like:
1,2,3
-> [1,2,3]
1 , 3, 4
-> [1,3,4]
one; two;three
-> ['one','two','three']
"this is a string", "this is a string with , and ;", 'this is a string with quotes like " these', "this is a string with escaped quotes \" and \'.", 3
-> ['this is a string','this is a string with , and ;','this is a string with quotes like " these','this is a string with escaped quotes " and '.',3]
function quotesplit($s)
{
$r = Array();
$p = 0;
$l = strlen($s);
while ($p < $l) {
while (($p < $l) && (strpos(" \r\t\n",$s[$p]) !== false)) $p++;
if ($s[$p] == '"') {
$p++;
$q = $p;
while (($p < $l) && ($s[$p] != '"')) {
if ($s[$p] == '\\') { $p+=2; continue; }
$p++;
}
$r[] = stripslashes(substr($s, $q, $p-$q));
$p++;
while (($p < $l) && (strpos(" \r\t\n",$s[$p]) !== false)) $p++;
$p++;
} else if ($s[$p] == "'") {
$p++;
$q = $p;
while (($p < $l) && ($s[$p] != "'")) {
if ($s[$p] == '\\') { $p+=2; continue; }
$p++;
}
$r[] = stripslashes(substr($s, $q, $p-$q));
$p++;
while (($p < $l) && (strpos(" \r\t\n",$s[$p]) !== false)) $p++;
$p++;
} else {
$q = $p;
while (($p < $l) && (strpos(",;",$s[$p]) === false)) {
$p++;
}
$r[] = stripslashes(trim(substr($s, $q, $p-$q)));
while (($p < $l) && (strpos(" \r\t\n",$s[$p]) !== false)) $p++;
$p++;
}
}
return $r;
}
alphibia at alphibia dot com
31-Mar-2004 06:19
I'd like to correct myself, I found that after testing my last solution it will create 5 lines no matter what... So I added this to make sure that it only displays 5 if there are five newlines. :-)
<?php
$MaxNewLines = 5;
$BRCount = substr_count($Message, '<br />');
if ($BRCount<$MaxNewLines)
$MaxNewLines=$BRCount;
else if($BRCount == 0)
$MaxNewLines=1;
$Message = str_replace(chr(13), "<br />", $Message);
$MessageArray = split("<br />", $Message, $MaxNewLines);
$Message = ""; $u=0;
do {
$Message.=$MessageArray[$u].'<br />';
$u++;
} while($u<($MaxNewLines-1));
$Message.=str_replace("<br />"," ",$MessageArray[$u]);
?>
-Tim
http://www.alphibia.com
nomail at please dot now
21-Nov-2003 09:33
If you want to use split to check on line feeds (\n), the following won't work:
$line = split("\n", $input_several_lines_long);
You really have to do this instead, notice the second slash:
$line = split("\\n", $input_several_lines_long);
Took me a little while to figure out.
krahn at niehs dot nih dot gov
24-Oct-2003 12:14
> strange things happen with split
> this didn't work
> $vontag $vonmonat were empty strings
...
> list ($vontag , $vonmonat) = split ('.' , $fromdate); // << bad
Split is acting exactly as it should; it splits on regular expressions.
A period is a regular expression pattern for a single character.
So, an actual period must be escaped with a backslash: '\.'
A period within brackets is not an any-character pattern, because it does
not make sense in that context.
Beware that regular expressions can be confusing becuase there
are a few different varieties of patterns.
dalu at uni dot de
08-Oct-2003 12:26
php4.3.0
strange things happen with split
this didn't work
$vontag $vonmonat were empty strings
<?php
function ckdate($fromdate="01.01", $todate="31.12")
{
$nowyear = date("Y");
list ($vontag , $vonmonat) = split ('.' , $fromdate); $vondatum = "$nowyear-$vonmonat-$vontag";
list ($bistag , $bismonat) = split ('.' , $todate); $bisdatum = "$nowyear-$bismonat-$bistag";
$von = strtotime($vondatum);
$bis = strtotime($bisdatum);
$now = time();
if (($now <= $bis) and ($now >= $von))
{
return TRUE;
}
else
{
return FALSE;
}
}
?>
however this one worked perfectly
<?php
function ckdate($fromdate="01.01", $todate="31.12")
{
$nowyear = date("Y");
list ($vontag , $vonmonat) = split ('[.]' , $fromdate); $vondatum = "$nowyear-$vonmonat-$vontag";
list ($bistag , $bismonat) = split ('[.]' , $todate); $bisdatum = "$nowyear-$bismonat-$bistag";
$von = strtotime($vondatum);
$bis = strtotime($bisdatum);
$now = time();
if (($now <= $bis) and ($now >= $von))
{
return TRUE;
}
else
{
return FALSE;
}
}
?>
btw this fn checks if $now if between $fromdate and $todate
use it if you like
jeffrey at jhu dot edu
10-Jan-2003 01:51
In answer to gwyne at gmx dot net, dec 1, 2002:
For split(), when using a backslash as the delimiter, you have to *double escape* the backslash.
example:
==================================
<pre>
<?
$line = 'stuff\\\thing\doodad\\';
$linearray = split('\\\\', $line); print join(":", $linearray);
?>
</pre>
==================================
output is:
<pre>
stuff::thing:doodad:
</pre>
paha at paha dot hu
21-Jul-2002 06:51
It's evident but not mentioned in the documentation that using asterisks is more restricted than in a normal regular expression.
for exaple you cannot say:
split(";*",$string);
because what if there's no ";" separator?(which is covered by this regular expression)
so you have to use at least
split(";+",$quotatxt);
in this situation.
fotw at gmx dot net
17-Jun-2002 12:50
Ups! It seems that neither explode nor split REALY takes a STRING but only a single character as a string for splitting the string.
I found this problem in one of my codes when trying to split a string using ";\n" as breaking string. The result, only ";" was thaken... the rest of the string was ignored.
Same when I tried to substitute "\n" by any other thing. :(
not at anythingspecial dot com
16-Jun-2002 06:48
If you need to do a split on a period make sure you escape the period out..
$ext_arr = split("\.","something.jpg");
... because
$ext_arr = split(".","something.jpg"); won't work properly.
kang at elpmis dot com
12-Jun-2002 11:30
This is a good way to display a comma delimited file with two columns. The first column is the URL's description, the second is the actual URL.
<ul>
<?php
$fname="relatedlinks.csv";
$fp=fopen($fname,"r") or die("Error found.");
$line = fgets( $fp, 1024 );
while(!feof($fp))
{
list($desc,$url,$dummy) = split( ",", $line, 3 );
print "<li>";
print "<a href='$url'>$desc</a>";
print "</li>\n";
$line = fgets( $fp, 1024 );
}
fclose($fp);
?>
</ul>
jchart at sdccu dot net
31-May-2002 12:56
[Ed. note: Close. The pipe *is* an operator in PHP, but
the reason this fails is because it's also an operator
in the regex syntax. The distinction here is important
since a PHP operator inside a string is just a character.]
The reason your code:
$line = "12|3|Fred";
list ($msgid, $msgref, $msgtopic)=split('|', $line);
didn't work is because the "|" symbol is an operator in PHP. If you want to use the pipe symbol as a delimiter you must excape it with a back slash, "\|". You code should look like this:
$line = "12|3|Fred";
list ($msgid, $msgref, $msgtopic)=split('\|', $line);
mcgarry at tig dot com dot au
17-May-2002 03:27
split() doesn't like NUL characters within the string, it treats the first one it meets as the end of the string, so if you have data you want to split that can contain a NUL character you'll need to convert it into something else first, eg:
$line=str_replace(chr(0),'',$line);
| |
eregi