The array_search() function searches an array for a given value and returns the key. The function returns the key for val if it is found in the array. It returns FALSE if it is not found. If val is found in the array arr more than once, then the first matching key is returned.
Syntax
array_search(val, arr, strict)
Parameters
val − The value to be searched
arr − The array to be searched
strict − Possible values are TRUE or FALSE. Search for identical elements in the array, set to TRUE.
Return
The array_search() function returns the key for val if it is found in the array. It returns FALSE if it is not found. If val is found in the array arr more than once, then the first matching key is returned.
Example
The following is an example −
<?php
$arr = array("p"=>20,"q"=>20,"r"=>30,"s"=>40);
echo array_search(20,$arr,true);
?>Output
The following is the output −
p
Example
Let us see another example −
<?php $arr = array(30, 2, 5, 7, 90, 35, 78); echo array_search(35,$arr,true); ?>
Output
The following is the output −
5
Example
Let us see another example with array having string values −
<?php
$arr = array("MAC", "WINDOWS","LINUX", "SOLARIS");
$search = "WINDOWS";
echo array_search($search,$arr,true);
?>Output
The following is the output −
1