Apply the "Work It" transformation to an Integer with PHP

missyElliott.php

<?php

function missyElliott(int $id): int {
	if ($id > 4294967295) {
		throw new \RuntimeException('Maximum integer size is 4_294_967_295');
	}
	// Int to Binary - ensure at least 32 char long binary string
	$binaryInt = str_pad(decbin($id), 32, '0', STR_PAD_LEFT);
  	// Split into workIt array
	$workIt = str_split($binaryInt, 1);
	// put my thing down function
 	 $putMyThingDown = static function($thing) use (&$workIt) {
		array_unshift($workIt, $thing);
	};
 	 // Pop the last item off and unshift (prepend) it...by reference
	$putMyThingDown(array_pop($workIt));
  	// flipIt function to invert the binary's 1's and 0's
	$flipIt = static function(&$it) {
		return array_map(static function($n) {
			$bool = filter_var($n, FILTER_VALIDATE_BOOLEAN);
			$invertBool = match ($bool) {
				true => false,
				false => true,
			};
			// convert to int and then string to ensure we get string 1's and 0's out
			return (string) (int) $invertBool;
		}, $it);
	};
  	// Actually flip it now
	$workIt = $flipIt($workIt);
	// Now we reverse it
	$workIt = array_reverse($workIt);
	// Implode the array back to a string and then back to a Decimal integer
	return bindec(implode('', $workIt));
}