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@ 2014-09-18T10:59:35Z

<?php
$myArray = array(1, 2, 3, 4, 5);

array_walk($myArray, function(&$value, $index){
    if ($value > 0) $value *= 2;
echo $value . "\n";
});

Output
Performance
VLD
References
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array_walk: documentation ( source)

preferences:dark modelive preview

39.3 ms | 402 KiB | 5 Q