How to implement php MD5 encryption 16-bit

substr(md5("admin"),8,16); // 16-bit MD5 encryption
md5("admin"); // 32-bit MD5 encryption

php md5 16-bit and 32-bit implementation code

Code:

echo substr(md5("admin"),8,16); // 16-bit MD5 encryption
echo "";
echo md5("admin"); // 32-bit MD5 encryption
?>

16-bit MD5 encryption is implemented by intercepting characters using the substr function.

Attachment: If you encounter an MD5 encrypted file and do not know the password, please replace this set of encrypted data in the database.

echo md5("admin",true);//Return 16 digits