preg_replace_callback_array
array$pattern,
string|array$subject,
[int$limit = -1],
[int
[int$flags = 0]
): string|array|null
The behavior of this function is similar to preg_replace_callback, except that callbacks are executed on a per-pattern basis.
Parameters
- 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.
- 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.
Exceptions and Errors
If the regex pattern passed does not compile to a valid regex, an E_WARNING is emitted.
Changelog
| Version | Description |
| 7.4.0 | The flags parameter was added. |