Eratags

PHP Type declarations or strict_types is a directive to use the strict mode for PHP type hinting. Click here to learn more.

The array_change_key_case is a built-in PHP function used to convert the array keys into upper case or lower case.

The PHP variadic are the functions that accept more than one argument according to the passed spread operator ... in the parameter.

The PHP unset() is a built-in PHP function used to destroy or delete the given variable. Click here to see more examples.

The PHP spread operator unpacks data of arrays and, packs the data in the function parameters. To learn more click here.

The PHP associative array (arrays) contains a list of values grouped by labels. Click here to see more examples.

PHP multidimensional array is an array in an array which means the ability to design a big tabular by arrays. Click here to learn more.

The online PHP compiler is a free online interpreter and editor (IDE) allows you to write and run your PHP code though the browser