preg_replace_callback_array

(PHP 7)

preg_replace_callback_array — Perform a regular expression search and replace using callbacks

Description

mixed preg_replace_callback_array ( array $patterns_and_callbacks , mixed $subject [, int $limit = -1 [, int &$count ]] )

The behavior of this function is similar to preg_replace_callback(), except that callbacks are executed on a per-pattern basis.

Parameters

patterns_and_callbacks: An associative array mapping patterns (keys) to callbacks (values).
subject: The string or an array with strings to search and replace.
limit: The maximum possible replacements for each pattern in each subject string. Defaults to -1 (no limit).
count: If specified, this variable will be filled with the number of replacements done.

Return Values

preg_replace_callback_array() returns an array if the subject parameter is an array, or a string otherwise. On errors the return value is NULL

If matches are found, the new subject will be returned, otherwise subject will be returned unchanged.

Examples

Example #1 preg_replace_callback_array() example


<?php
$subject = 'Aaaaaa Bbb';

preg_replace_callback_array(
    [
        '~[a]+~i' => function ($match) {
            echo strlen($match[0]), ' matches for "a" found', PHP_EOL;
        },
        '~[b]+~i' => function ($match) {
            echo strlen($match[0]), ' matches for "b" found', PHP_EOL;
        }
    ],
    $subject
);
?>

The above example will output:

6 matches for "a" found
3 matches for "b" found

User Contributed Notes

drevilkuko at gmail dot com

4 months ago


finally!!!

before (<=php5.6):

<?php
        $htmlString = preg_replace_callback(
            '/(href="?)(\S+)("?)/i',
            function (&$matches) {
                return $matches[1] . urldecode($matches[2]) . $matches[3];
            },
            $htmlString
        );

        $htmlString = preg_replace_callback(
            '/(href="?\S+)(%24)(\S+)?"?/i', // %24 = $
            function (&$matches) {
                return urldecode($matches[1] . '$' . $matches[3]);
            },
            $htmlString
        );
?>

php7

<?php

        $htmlString = preg_replace_callback_array(
            [
                '/(href="?)(\S+)("?)/i' => function (&$matches) {
                    return $matches[1] . urldecode($matches[2]) . $matches[3];
                },
                '/(href="?\S+)(%24)(\S+)?"?/i' => function (&$matches) {
                    return urldecode($matches[1] . '$' . $matches[3]);
                }
            ],
            $htmlString
        );
?>

jfcherng at NOSPAM dot gmail dot com