If you have to analyze a URL string from somewhere, you can use the parse_url function to extract the query first and then use parse_str which parses a query in the same way as PHP does automatically with the script's URL when building the $_GET associative array on startup.

An array in PHP is actually an ordered map. A map is a type that associates values to keys. This type is optimized for several different uses; it can be treated as an array, list (vector), hash table (an implementation of a map), dictionary, collection, stack, queue, and probably more.

In PHP, individual elements in an array can easily be reassigned. To do this, we access the location of an element in the array using square brackets ( [] ), and then assign a new value using the assignment operator ( = ).

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.