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run code in 150+ php & hhvm versions
Bugs & Features
<?php $array = array(0 => 100, "color" => "red"); $keys = array_keys($array[0]); foreach($keys as $key => $value) { echo $value ; } ?>
Output for 5.3.0 - 7.1.0
Warning: array_keys() expects parameter 1 to be array, integer given in /in/43Z9G on line 4 Warning: Invalid argument supplied for foreach() in /in/43Z9G on line 5
Output for 4.3.2 - 4.3.10, 4.4.0 - 5.2.17
Warning: array_keys(): The first argument should be an array in /in/43Z9G on line 4 Warning: Invalid argument supplied for foreach() in /in/43Z9G on line 5
Output for 4.3.11
Warning: array_keys(): The first argument should be an array in /in/43Z9G on line 4
Output for 4.3.0 - 4.3.1
Warning: array_keys() [http://www.php.net/function.array-keys]: The first argument should be an array in /in/43Z9G on line 4 Warning: Invalid argument supplied for foreach() in /in/43Z9G on line 5