Array key Exists Function in PHP
In this article I explain array key exists function in PHP.
PHP array_key_exists Function
The PHP array_key_exists function deterimes whether the specified key or index exists in the given array or not and returns true if it exists otherwise false.
Syntax
array_key_exists(key, array) |
Parameters
The parameters of the array_key_exists function are:
Parameter |
Description |
key |
It specifies key. |
array |
It specifies an array. |
Example
An example of the array_key_exists function is:
<?php
echo "<pre>";
$val = array("a" => "Apple", "b" => "Mango", "c" => "Orange", "Banana");
if(array_key_exists("a",$val))
{
echo "Key exists!";
}
else
{
echo "key does not exists!";
}
?>
Output