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run code in 200+ php & hhvm versions
Bugs & Features
<?php $word = "word,!pineapple--pizza"; $revd = preg_replace_callback('#([A-Za-z]+)#', 'strrev', $word); var_dump($revd);
Output for 5.3.0 - 7.1.7
Warning: strrev() expects parameter 1 to be string, array given in /in/JI7vJ on line 4 Warning: strrev() expects parameter 1 to be string, array given in /in/JI7vJ on line 4 Warning: strrev() expects parameter 1 to be string, array given in /in/JI7vJ on line 4 string(4) ",!--"
Output for 4.3.0 - 5.2.17
Notice: Array to string conversion in /in/JI7vJ on line 4 Notice: Array to string conversion in /in/JI7vJ on line 4 Notice: Array to string conversion in /in/JI7vJ on line 4 string(19) "yarrA,!yarrA--yarrA"