The array_filter() function filters elements of an array using a user-made callback function. It returns the filtered array.
Syntax
array_filter(arr, callback, flag)
Parameters
arr − The array that will be filtered
callback − The callback function to be used
flag − The parameters sent to the callback function:
ARRAY_FILTER_USE_KEY − pass key as the only argument to callback instead of the value
ARRAY_FILTER_USE_BOTH − pass both value and key as arguments to callback instead of the value
Return
The array_filter() function returns the filtered array.
Example
<?php
function check($arr) {
return(!($arr & 1));
}
$arr1 = array(3, 6, 9, 15, 20, 30, 45, 48, 59, 66);
print_r(array_filter($arr1, "check"));
?>Output
Array ( [1] => 6 [4] => 20 [5] => 30 [7] => 48 [9] => 66 )