crypt_gensalt
Compile a string for use as the salt argument to crypt
Description
stringnull crypt_gensalt(string $prefix = null, int $count = 0)
Compile a string for use as the salt argument to crypt.
Parameters
-
prefix
-
Hashing method.
One of the
CRYPT_PREFIX_* constant.
If null, the best available hashing method will be selected.
-
count
-
Controls the processing cost of the hash;
the valid range and exact meaning of count depend on the hashing method,
but larger numbers correspond to more costly hashes in
terms of CPU time and possibly memory usage.
If count is
0, a low default cost will be selected.
Return Values
Returns a string with the setting, or null in case of an error.
Examples
Example #1 A crypt_gensalt example
<?php
// Generate the salt
$salt = crypt_gensalt(CRYPT_PREFIX_BLOWFISH);
// Hash the password
$hash = crypt("secret", $salt);
// Check the hash
$test = hash_equals(crypt("secret", $hash), $hash);
var_dump($salt, $hash, $test);
?>
The above example will output:
string(29) "$2y$05$GcPykP.Am8C1.dGamdpwW."
string(60) "$2y$05$GcPykP.Am8C1.dGamdpwW.1RR.7uicWvJPZfJfCEizZHqVWwuaJLm"
bool(true)
See Also
- crypt_preferred_method
- crypt
- hash_equals