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PHP5中文手册

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