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Certified PHP Developer Learning Resources Array Traversal

Array Traversal
 


The foreach control structure exists specifically for arrays. It provides an easy way to traverse an array.


$arr = array(1, 2, 3, 4);
foreach ($arr as &$value) {
    $value = $value * 2;
}
// $arr is now array(2, 4, 6, 8)
unset($value); // break the reference with the last element
?>