Using array_search() and in_array() The array_search() function searches for a value in an associative array and returns the corresponding key if found, or false if not found. In this case I suggest you use the strict comparison mode.

The array_search() is an inbuilt function in PHP that is used to search for a particular value in an array, and if the value is found then it returns its corresponding key. If there are more than one values then the key of the first matching value will be returned.

Multidimensional array search using array_search() method: This function only returns the key index instead of a search path. The array_column() function returns the values from a single column in the input array.

PHP array_key_exists() Function The array_key_exists() function checks an array for a specified key, and returns true if the key exists and false if the key does not exist.