Run PHP cron tasks without cron available

gistfile1.php

<?php
	ob_start();
	 
	// Generage HTML page here
	generate_full_html_page();
	 
	// All magic goes here
	$output = ob_get_clean();
	ignore_user_abort(true);
	set_time_limit(0);
	header("Connection: close");
	header("Content-Length: ".strlen($output));
	header("Content-Encoding: none");
	echo $output.str_repeat(' ', 10000) ."\n\n\n";
	flush();
	 
	// Now page is sent and it safe to do all needed stuff here
	cron_task1();
	cron_task2();