PHP两种方法生成强密码_PHP教程

<?php
	$password_length = 9;
	
	function make_seed() {
		list($usec, $sec) = explode(' ', microtime());
		return (float) $sec + ((float) $usec * 100000);
	}
	
	srand(make_seed());
	// 随机字符总集
	$alfa = "1234567890qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM";
	$token = "";
	for($i = 0; $i < $password_length; $i ++) {
		$token .= $alfa[rand(0, strlen($alfa))];
	}
	echo $token;
?>  

<?php
	// 创建密码
	$totalChar = 8; // 密码中字符串的个数
    // salt to select chars from
	$salt = "abcdefghijklmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ123456789"; 
	srand((double)microtime()*1000000); // 启动随机产生器
	$Spass=""; // 设置初始值
	for ($i=0;$i<$totalChar;$i++) // 循环创建密码
		$Spass = $Spass . substr ($salt, rand() % strlen($salt), 1);
	echo $Spass;	
?>?