<?php
// Generate a password of length = Max(8, $len)
function generatePassword($len)
{
	$lower = array('a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z');
	$upper = array('A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z');
	$specials = array('!','"','#','$','%','&','\'','(',')','*','+',',','-','.','/',':',';','<','=','>','?','@','[','\\',']','^','_','`','{','|','}','~');
	$digits = array('0','1','2','3','4','5','6','7','8','9');
	$all = array($lower, $upper, $specials, $digits);
	
	$pwd = $lower[array_rand($lower, 1)];
	$pwd = $pwd . $upper[array_rand($upper, 1)];
	$pwd = $pwd . $specials[array_rand($specials, 1)];
	$pwd = $pwd . $digits[array_rand($digits, 1)];
	
	for($i = strlen($pwd); $i < max(8, $len); $i++)
	{
		$temp = $all[array_rand($all, 1)];
		$pwd = $pwd . $temp[array_rand($temp, 1)];
	}
	return str_shuffle($pwd);
}

echo generatePassword(1);