(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
sha1 — Calculate the sha1 hash of a string
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.
Calculates the sha1 hash of string using the
» US Secure Hash Algorithm 1.
stringThe input string.
binary
If the optional binary 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.
Example #1 A sha1() example
<?php
$str = 'apple';
if (sha1($str) === 'd0be2dc421be4fcd0172e5afceea3970e2f3d940') {
echo "Would you like a green or red apple?";
}
?>