array_keys function to get the array of keys used inside an array for a matching value

array_keys to get the keys of matching values of an array

array = array_keys ($input_array, $search_str,$strict);

Parameter	DESCRIPTION
$input_array	Required : Input array to be searched.
$search_str	Optional: Values to be searched inside $input_array.
$strict	Optional: FALSE ( default): strict comparison is not done. TRUE comparison of type of variable is done.

arrays_key function returns an array with all the keys as element. We can specify a value of the array and get the associated keys for the element.

We will start with some examples.

$ar=array("SName"=>"Ronald","Class"=>"Fourth","Subject"=>"Science","Game"=>"Cricket");

$kar=array_keys($ar);

print_r($kar);

The output is here

Array ( [0] => SName [1] => Class [2] => Subject [3] => Game )

We can pass a value (of element ) and get the respective key like this

$ar=array("SName"=>"Ronald","Class"=>"Fourth","Subject"=>"Science","Game"=>"Cricket");
$kar=array_keys($ar,'Fourth');
print_r($kar);

We will get a single element array returning the key Output is here

Array ( [0] => Class )

Example with more than one matching

$ar=array("SName"=>"Ronald","Class"=>"Fourth","Subject"=>"Cricket","Game"=>"Cricket");
$kar=array_keys($ar,'Cricket');
print_r($kar);

Output is here

Array ( [0] => Subject [1] => Game )

Two keys are returned in above case.

Function	Details
in_array()	Search for value inside Array. Returns TRUE or FALSE
array_search()	Search for value inside Array. Returns the key if found, FALSE otherwise
array_key_exists()	Search for key inside Array. True if found, FALSE otherwise

Seach for keys inside an array
Array REFERENCE

Subscribe to our YouTube Channel here

This article is written by plus2net.com team. https://www.plus2net.com

plus2net.com