Csardelacal

<?php

function uuid() {
	$data    = random_bytes(16);
	$data[6] = chr((ord($data[6]) | 0xC0) & 0x4F);
	$data[8] = chr((ord($data[8]) | 0xC0) & 0xBF);

	$str = bin2hex($str);
	return sprintf('%s-%s-%s-%s-%s', substr($str, 0, 8), substr($str, 8, 4), substr($str, 12, 4), substr($str, 16, 4), substr($str, 20));
}

Csardelacal

<?php

/**
 * This class is intended as a tool to aid creating loops with special events in 
 * them. You can instance the class before running your loop and simply trigger
 * the next() method whenever you need it.
 * 
 * E.g. This is specially useful if you need to print a certain HTML tag every
 * X executions of your loop. You can do it like this:
 * 

Csardelacal

function array_filter_recursive($element) {
	if ( is_array($element) ) {
		foreach ($element as &$subelement) {
			$subelement = self::array_filter_recursive($subelement);
		}
		return array_filter($element);
	}

	return !!$element;
}