Introduction
This article explains the Filters Array Element in PHP. For this explanation I will use some functions like the Array_filter() function. This function filters the elements or values of an array using a callback function. The array_filter() function passes each value of the input array to the callback function. If the callback function returns true then something. The array filter function is very useful for removing empty elements in an array. You will see that phenomenon in the example below.
Syntax
This function filters elements of an array using a callback function. The syntax is:
|
Array_filter($array ,callback function); |
| Parameter | Description |
| Array | Required: Use a specific array for filtering |
| Callback | Required: A specific callback function to be used |
This function returns the filter array element.
Let's start with the first example. I will find an even and odd number using the callback array_filter() function. Such as in the following:
Example
<?php
function odd($element)
{
return($element & 1);
}
function even($element)
{
return(!($element & 1));
}
$data1 = array(
"a"=>5,
"b"=>9,
"c"=>7,
"d"=>4,
"e"=>12
);
$data2 = array(61, 72, 83, 34, 55, 44, 20);
echo "Odd Number:";
echo "<pre>";
print_r(array_filter($data1, "odd"));
echo "<br>";
echo "<b>Even Number:</b>";
echo "<pre>";
print_r(array_filter($data2, "even"));
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