Syntax
|
array array_filter ( array $input [, callback $callback] );
|
Definition and Usage
Iterates over each value in the
input array passing them to the
callback function. If the
callback function returns true, the current value from
input is returned into the result array. Array keys are preserved.
Paramters
| Parameter | Description |
|---|
| input | The array to iterate over |
| callback | The callback function to use |
If no callback is supplied, all entries of input equal to FALSE will be removed.
Return Values
Returns the filtered array.
Example
Try out following example:
<?php
function odd($var)
{
return($var & 1);
}
function even($var)
{
return(!($var & 1));
}
$array1 = array("a"=>1, "b"=>2, "c"=>3, "d"=>4, "e"=>5);
$array2 = array(6, 7, 8, 9, 10, 11, 12);
echo "Odd :\n";
print_r(array_filter($array1, "odd"));
echo "Even:\n";
print_r(array_filter($array2, "even"));
?>
|
This will produce following result:
Odd :
Array ( [a] => 1 [c] => 3 [e] => 5)
Even:
Array ( [0] => 6 [2] => 8 [4] => 10 [6] => 12)
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