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PHP Quiz PHP CertificatePHP array_filter() Function
Example
Fill an array with values, specifying keys:
<?php
function test_odd($var)
{
return($var & 1);
}
$a1=array("a","b",2,3,4);
print_r(array_filter($a1,"test_odd"));
?>
function test_odd($var)
{
return($var & 1);
}
$a1=array("a","b",2,3,4);
print_r(array_filter($a1,"test_odd"));
?>
Run example »
Definition and Usage
The array_filter() function filters the values of an array using a callback function.
This function passes each value of the input array 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.
Syntax
array_filter(array,callbackfunction);
| Parameter | Description |
|---|---|
| array | Required. Specifies the array to filter |
| callbackfunction | Required. Specifies the callback function to use |
Technical Details
| Return Value: | Returns the filtered array |
|---|---|
| PHP Version: | 4.0.6+ |
PHP Array Reference
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