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PHP Manual [preg_replace_callback_array]

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PHP Manual || PCRE Functions

(PHP 7)

preg_replace_callback_arrayPerform a regular expression search and replace using callbacks

Description

preg_replace_callback_array ( array $patterns_and_callbacks , mixed $subject [, int $limit = -1 [, int &$count [, int $flags = 0 ]]] ) : mixed

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.

flags

flags can be a combination of the PREG_OFFSET_CAPTURE and PREG_UNMATCHED_AS_NULL flags, which influence the format of the matches array. See the description in preg_match() for more details.

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.

Changelog

Version Description
7.4.0 The flags parameter was added.

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

See Also



PHP Manual || PCRE Functions