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array_filterFilters elements of an array using a callback function Description
array array_filter(array
$array , callablenull $callback = null , int $mode = 0)
Iterates over each value in the
Array keys are preserved, and may result in gaps if the Parameters
Return ValuesReturns the filtered array. Changelog
Examples
Example #1 array_filter example
The above example will output: Odd : Array ( [a] => 1 [c] => 3 [e] => 5 ) Even: Array ( [0] => 6 [2] => 8 [4] => 10 [6] => 12 ) Example #2 array_filter without
The above example will output: Array ( [0] => foo [2] => -1 ) Example #3 array_filter with
The above example will output: array(1) { ["b"]=> int(2) } array(2) { ["b"]=> int(2) ["d"]=> int(4) } NotesCaution
If the array is changed from the callback function (e.g. element added or unset) the behavior of this function is undefined. See Also
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