crypt_gensalt
PHP function
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(PECL xpass >= 1.1.0)
Compile a string for use as the salt argument to crypt
Description
crypt_gensalt(string $prefix = null, int $count = 0): string|null
Compile a string for use as the salt argument to crypt().
Parameters
prefixHashing method. One of the
CRYPT_PREFIX_*constant. If null, the best available hashing method will be selected.countControls 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
A crypt_gensalt() example
php
<?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:
output
string(29) "$2y$05$GcPykP.Am8C1.dGamdpwW."
string(60) "$2y$05$GcPykP.Am8C1.dGamdpwW.1RR.7uicWvJPZfJfCEizZHqVWwuaJLm"
bool(true)