$hash = sodium_crypto_pwhash_str
($passwd, SODIUM_CRYPTO_PWHASH_OPSLIMIT_INTERACTIVE,
SODIUM_CRYPTO_PWHASH_MEMLIMIT_INTERACTIVE);
-var_dump(substr($hash, 0, 9) ===
+var_dump(substr($hash, 0, strlen(SODIUM_CRYPTO_PWHASH_STRPREFIX)) ===
SODIUM_CRYPTO_PWHASH_STRPREFIX);
$testHash = '$argon2i$v=19$m=4096,t=3,p=1$MzE4ODFiZWFlMjAzOWUAAA$FWUV6tsyJ32qThiLi1cCsLIbf3dIOG/RwXcTzt536KY';
$c = sodium_crypto_pwhash_str_verify($testHash, $passwd);
var_dump($c);
-$testHash = '$argon2i$v=19$m=4096,t=2,p=1$c29tZXNhbHQAAAAAAAAAAA$JTBozgKQiCn5yKAm3Hz0vUSX/XgfqhZloNCxDWmeDr0';
+$testHash = '$argon2i$v=19$m=4096,t=0,p=1$c29tZXNhbHQAAAAAAAAAAA$JTBozgKQiCn5yKAm3Hz0vUSX/XgfqhZloNCxDWmeDr0';
$c = sodium_crypto_pwhash_str_verify($testHash, $passwd);
var_dump($c);