(PHP 4 >= 4.3.0, PHP 5)
sha1 — Calculate the sha1 hash of a string
$str
[, bool $raw_output = false
] )
Calculates the sha1 hash of str using the
» US Secure Hash Algorithm 1.
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.
Returns the sha1 hash as a string.
| Version | Description |
|---|---|
| 5.0.0 |
The raw_output parameter was added.
|
Example #1 A sha1() example
<?php
$str = 'apple';
if (sha1($str) === 'd0be2dc421be4fcd0172e5afceea3970e2f3d940') {
echo "Would you like a green or red apple?";
}
?>
Note: Secure password hashing
It is not recommended to use this function to secure passwords, due to the fast nature of this hashing algorithm. See here for details.