PHP array_search() function

The array_search() function is an inbuilt function of PHP. It is used to search the array against the given value. The function returns the first corresponding key if successful. This function was introduced in PHP 4.0.5.

Syntax

mixed array_search ( mixed $needle , array $haystack [, bool $strict = FALSE ] );

Parameter

Parameter	Description	Is compulsory
Value search	Value to search.	compulsory
array name	Input array name.	compulsory
strict	If TRUE, checks the type of the value. The default value is FALSE.	Optional

Return type

The array_search() function returns the key of the corresponding value that is passed. If not found, FALSE is returned, and if there are more than one matches, the first matched key is returned.

Example 1

<?php
$subject = array(0 => 'java', 1=> 'os', 2 => 'c',3 => 'compiler');
$result = array_search('compiler', $subject);
print_r ($result); 
?>

Output:

Example 2

<?php
$color = array("a"=>"red","b"=>"yellow","c"=>"green");
print_r(array_search("red", $color));
?>

Output:

Example 3

<?php
$num=array("a"=>"5","b"=>5,"c"=>"5","d"=>"5");
print_r(array_search(5,$num,true));
?>

Output:

Example 4

<?php
$array = array(45, 5, 1, 22, 22, 10, 10);
$value = "10";
print_r(array_Search($value, $array,false));
?>

Output:

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