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run code in 150+ php & hhvm versions
Bugs & Features
<?php $string = 'This is a string!'; $i = 0; var_dump(implode('', array_map(str_split($string), function($val, $key) { return ($key % 2 ? $val : null); })));
based on a4G8m
Output for 5.3.0 - 7.1.0
Warning: array_map() expects parameter 1 to be a valid callback, array must have exactly two members in /in/eHQbZ on line 7 Warning: implode(): Invalid arguments passed in /in/eHQbZ on line 7 NULL
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/eHQbZ on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/eHQbZ on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/eHQbZ on line 5
Process exited with code 255.