Strings
PHP Manual

md5

(PHP 4, PHP 5, PECL hash:1.1-1.3)

md5 — Calculate the md5 hash of a string

说明

string md5 ( string $str [, bool $raw_output ] )

Calculates the MD5 hash of str using the » RSA Data Security, Inc. MD5 Message-Digest Algorithm, and returns that hash.

参数

str

The string.

raw_output

If the optional raw_output is set to TRUE, then the md5 digest is instead returned in raw binary format with a length of 16. Defaults to FALSE.

返回值

Returns the hash as a 32-character hexadecimal number.

更新日志

版本 说明
5.0.0 The raw_output parameter was added.

范例

Example#1 A md5() example

<?php
$str 
'apple';

if (
md5($str) === '1f3870be274f6c49b3e31a0c6728957f') {
    echo 
"Would you like a green or red apple?";
    exit;
}
?>

参见


Strings
PHP Manual