sha1
(PHP 4 >= 4.3.0, PHP 5)
sha1 — Calculate the sha1 hash of a string
Description
string sha1
( string $str
[, bool $raw_output = false
] )
Calculates the sha1 hash of str using the » US Secure Hash Algorithm 1.
Parameters
- 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.
Return Values
Returns the sha1 hash as a string.
Changelog
| Version | Description |
|---|---|
| 5.0.0 | The raw_output parameter was added. |
Examples
Example #1 A sha1() example
<?php
$str = 'apple';
if (sha1($str) === 'd0be2dc421be4fcd0172e5afceea3970e2f3d940') {
echo "Would you like a green or red apple?";
}
?>
See Also
- sha1_file() - Calculate the sha1 hash of a file
- crc32() - Calculates the crc32 polynomial of a string
- md5() - Calculate the md5 hash of a string
- hash() - Generate a hash value (message digest)