pg_fetch_assoc

(PHP 4 >= 4.3.0, PHP 5)

pg_fetch_assoc -- Fetch a row as an associative array

Описание

array pg_fetch_assoc ( resource result [, int row] )

pg_fetch_assoc() returns an associative array that corresponds to the fetched row (records).

pg_fetch_assoc() is equivalent to calling pg_fetch_array() with PGSQL_ASSOC as the optional third parameter. It only returns an associative array. If you need the numeric indices, use pg_fetch_row().

Замечание: Эта функция устанавливает NULL-поля в значение NULL PHP.

pg_fetch_assoc() is NOT significantly slower than using pg_fetch_row(), and is significantly easier to use.

Замечание: row became optional in PHP 4.1.0.

Список параметров

result

PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).

row

Row number in result to fetch. Rows are numbered from 0 upwards. If omitted, next row is fetched.

Возвращаемые значения

An array indexed associatively (by field name). Each value in the array is represented as a string. Database NULL values are returned as NULL.

FALSE is returned if row exceeds the number of rows in the set, there are no more rows, or on any other error.

Примеры

Пример 1. pg_fetch_assoc() example

<?php
$conn = pg_connect("dbname=publisher");
if (!$conn) {
  echo "An error occured.\n";
  exit;
}

$result = pg_query($conn, "SELECT id, author, email FROM authors");
if (!$result) {
  echo "An error occured.\n";
  exit;
}

while ($row = pg_fetch_assoc($result)) {
  echo $row['id'];
  echo $row['author'];
  echo $row['email'];
}
?>

Смотрите также

pg_fetch_row()
pg_fetch_array()
pg_fetch_object()
pg_fetch_result()



pg_fetch_assoc
24-May-2006 12:59
If you request a row that does not exist, it just fails, rather than simply returning false.
Luke
22-Sep-2005 06:34
Note:

PostgreSQL boolean values set to TRUE are returned as the string "t"

PostgreSQL boolean values set to FALSE are returned as the string "f"
petrus at bmail dot com dot au
24-Feb-2005 07:22
$dbconn3 = pg_connect("host=127.0.0.1 port=5432 dbname=blah user=blah password=blah");
$result = pg_query($dbconn3, "SELECT * FROM Packages");

 echo "<HTML><HEAD><TITLE>PostgreSQL Test Page</TITLE></HEAD><BODY>";
 echo "<TABLE>";

$pkg = pg_fetch_assoc($result);
foreach ($pkg as $value) {
   echo "<TR><TD>$value";
   echo "</TR></TD>";
 }

echo "</TABLE><P>";
echo "This package's full filename is: {$pkg['name']}-{$pkg['version']}{$pkg['extension']}";
echo "</BODY></HTML>";

For generating tables, this works, and personally I prefer foreach() to while loops because there's no danger of accidentally causing an infinite loop...foreach only works for as long as it has something to work with, and then stops.  I thought the echo down the bottom might come in handy, too...took me a bit to find that out.
spam at pasher dot org
24-Oct-2003 06:35
An important thing to note (as of PHP 4.3.2):

If you are used to using the "extended" comparision operators (=== and !==) to try to make your code easier to follow visually, this function will return NULL if the provided resource handle is invalid (as opposed to false). ie,

$rs = @pg_query('SELECT * FROM fake_table');
while (false !== ($row = @pg_fetch_assoc($rs)))
{
   print_r($row);
}

Obviously you should check to see if $rs === false before you start the while loop, but this example is used to illustrate a potential infinite loop problem if $rs IS false.
ninja (whorl) thinkninja (stop) com
21-Jun-2003 08:29
If you are moving between different versions of PHP, this might be handy:

if (!function_exists('pg_fetch_assoc')) {
   function pg_fetch_assoc ($result)
   {
     return @pg_fetch_array($result, NULL, PGSQL_ASSOC);
   }
}
Brenton Strickler
06-Jan-2003 05:53
At a glance, the syntax listed at the top of this page doesn't match the example.  The PGSQL_ASSOC flag isn't necessary.

<pg_fetch_arraypg_fetch_object>
 Last updated: Tue, 15 Nov 2005