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.
Examples
Example #1 A sha1 example
<?php
$str = 'apple';
if (sha1($str) === 'd0be2dc421be4fcd0172e5afceea3970e2f3d940') {
echo "Would you like a green or red apple?";
}
?>
Notes
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.