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PHP5中文手册

sha1

(PHP 4 >= 4.3.0, PHP 5, PECL hash:1.1-1.3)

sha1 — Calculate the sha1 hash of a string

说明

string sha1 ( string $str [, bool $raw_output ] )

Calculates the sha1 hash of str using the » US Secure Hash Algorithm 1,

参数

str: The input string.
raw_output: If the optional raw_output is set to TRUE, then the sha1 digest is instead returned in raw binary format with a length of 20, otherwise the returned value is a 40-character hexadecimal number. Defaults to FALSE.

返回值

Returns the sha1 hash as a string.

更新日志

版本	说明
5.0.0	The `raw_output` parameter was added.

范例

Example#1 A sha1() example


<?php
$str = 'apple';

if (sha1($str) === 'd0be2dc421be4fcd0172e5afceea3970e2f3d940') {
    echo "Would you like a green or red apple?";
    exit;
}
?>

参见