PHP array_search() Function

PHP array_search() Function

The array_search() function in PHP searches the array for the specified value. This function returns the first corresponding key if the value is found.

Syntax

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

Parameter

needle(required)- This parameter represents the value to search.

haystack(required)- This parameter signifies the input array.

strict(optional)- This parameter signifies the strictness of the search. It takes only Boolean values which are as follows:

• If it is set to Boolean TRUE, the function checks only for identical elements.
• If set to Boolean FALSE(default), strictness is not maintained.

Return

This function returns the first corresponding key if the needle value is found else it returns false.

Example 1

 'blue', 1 => 'red', 2 => 'green', '' => 'red');
//passing the searched value
$search_value='red'; 
//returns the first key if the value is found
$key = array_search($search_value, $array); // $key = 2;
//printing the key
echo("The ".$search_value." is found at key position ".$key); 

Output

The red is found at key position 1

Example 2

Output



The value 90 is found at key position 1



Example 3







Output



When strictness is set to true...
The value 90 is found at key position 
When strictness is set to false...
The value 90 is found at key position 1 



Example 4







Output



The value 90 is found at key position