x
 
<!DOCTYPE html>
<html>
<body>
<?php 
$str = "Hello"; 
echo "字符串: ".$str."<br>"; 
echo "TRUE - 原始 20 字符二进制格式: ".sha1($str, TRUE)."<br>"; 
echo "FALSE - 40 字符十六进制数: ".sha1($str)."<br>"; 
?>
</body>
</html>