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<?php class A { static function cast(&$val, $key) { if (is_numeric($val)) { //return $val + 0; $val += 0; } //return 0; //return $val; } static function run() { $arr = ['stri33ng123', 84, 76.7, '45.6', '67.5e45', '56,9']; var_dump($arr); array_walk($arr , 'cast'); var_dump($arr); } } A::run();
Output for git.master, git.master_jit, rfc.property-hooks
array(6) { [0]=> string(11) "stri33ng123" [1]=> int(84) [2]=> float(76.7) [3]=> string(4) "45.6" [4]=> string(7) "67.5e45" [5]=> string(4) "56,9" } Fatal error: Uncaught TypeError: array_walk(): Argument #2 ($callback) must be a valid callback, function "cast" not found or invalid function name in /in/SYutg:18 Stack trace: #0 /in/SYutg(18): array_walk(Array, 'cast') #1 /in/SYutg(29): A::run() #2 {main} thrown in /in/SYutg on line 18
Process exited with code 255.

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