mb_ereg_replace_callback Perform a regular expression search and replace with multibyte support using a callback &reftitle.description; stringfalsenullmb_ereg_replace_callback stringpattern callablecallback stringstring stringnulloptions&null; Scans string for matches to pattern, then replaces the matched text with the output of callback function. The behavior of this function is almost identical to mb_ereg_replace, except for the fact that instead of replacement parameter, one should specify a callback. &reftitle.parameters; pattern The regular expression pattern. Multibyte characters may be used in pattern. callback A callback that will be called and passed an array of matched elements in the subject string. The callback should return the replacement string. You'll often need the callback function for a mb_ereg_replace_callback in just one place. In this case you can use an anonymous function to declare the callback within the call to mb_ereg_replace_callback. By doing it this way you have all information for the call in one place and do not clutter the function namespace with a callback function's name not used anywhere else. string The string being checked. options The search option. See mb_regex_set_options for explanation. &reftitle.returnvalues; The resultant string on success, or &false; on error. If string is not valid for the current encoding, &null; is returned. &reftitle.changelog; &Version; &Description; 8.0.0 options is nullable now. 7.1.0 The function checks whether string is valid for the current encoding. &reftitle.examples; ]]> &example.outputs; ]]> &reftitle.notes; ¬e.mbstring.encoding.internal; &reftitle.seealso; mb_regex_encoding mb_ereg_replace Anonymous functions