php中可能用来加密字符串的函数[base64_encode、urlencode、sha1]

复制代码 代码如下:

<?php
$encryption = "username";
echo base64_encode ($encryption);//echo "dXNlcm5hbWU= ";
echo "<br>";
echo urlencode("http://".$encryption);//echo " http%3A%2F%2Fusername ";
echo "<br>";
echo sha1($encryption);//echo "249ba36000029bbe97499c03db5a9001f6b734ec"
echo "<br>";
?>