Some password crypting with PHP

crypt.php

<?php

define('PASSWD_SALT_LENGTH', 16);
define('PASSWD_HASH_ALGORITHM', 'sha512');
define('SALT_LENGTH', 16);

function passwordCrypt($password) {
    $saltSource = fopen('/dev/random', 'rb');
    $saltData = bin2hex(fread($saltSource, PASSWD_SALT_LENGTH));
    fclose($saltSource);
    $sourceString = $saltData . $password;
    return $saltData . hash(PASSWD_HASH_ALGORITHM, $sourceString);
}

function passwordTest($password, $hash) {
    $salt = substr($hash, 0, PASSWD_SALT_LENGTH*2);
    $actualHash = substr($hash, PASSWD_SALT_LENGTH*2);
    return hash(PASSWD_HASH_ALGORITHM, $salt . $password) == $actualHash;
}

$bees1 = passwordCrypt("bees");
$bees2 = passwordCrypt("bees");

echo "First hash: $bees1\n";
echo "Second hash: $bees2\n";

echo "Test for bees 1: " . (passwordTest("bees", $bees1) ? "MATCH" : "NO MATCH") . "\n";
echo "Test for bees 2: " . (passwordTest("bees", $bees2) ? "MATCH" : "NO MATCH") . "\n";
echo "Bad test for bees 1: " . (passwordTest("faces", $bees1) ? "MATCH" : "NO MATCH") . "\n";

echo "Crypted length: " . strlen($bees1) . "\n";