preg_replace_callback_array()

preg_replace_callback_array() — Perform a regular expression search and replace using callbacks.

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

Inputs: pattern: An associative array mapping patterns (keys) to callables (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.

Returns: 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.