sha1
(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
sha1 — Calculate the sha1 hash of a string
Warning
It is not recommended to use this function to secure passwords, due to the fast nature of this hashing algorithm. See the Password Hashing FAQ for details and best practices.
Description
sha1(string
$string, bool $binary = false): string
Calculates the sha1 hash of string using the
» US Secure Hash Algorithm 1.
Parameters
-
string -
The input string.
-
binary -
If the optional
binaryis set totrue, 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.
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)
- crypt() - One-way string hashing
- password_hash() - Creates a password hash
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