md5 hash of a string. Encryption of password

Md5 hash: Encryption of a string

$str="Hello";
echo md5($str);

The output of the above code will be

8b1a9953c4611296a827abf8c47804d7

md5 returns the hash of a string. This is used to encrypt strings and particularly encrypting the passwords of the user. This function returns the encrypted string by using RSA Data Security Inc.

Inputs

String : for which md5 to be generated
raw : Optional , TRUE : 16 chars binary format . FALSE : 32 chars hex number ( default )

The length of the password after encryption is 32 char if the raw is set to FALSE ( default )
If you are using database table to store password then the password field should be minimum 32 char length. Read sql_update command to know more about storing encrypted password in table.

md5 encryption is not so useful to store passwords and other sensitive data. This is just minimum standard of encryption only.

md5 encryption is one way only, there is no standard method to generate the source or the original string from the hash of the string. So passwords can't be retrieved and it can only be reset.

Here is a script to display the md5 output for a given string.

Maximum 16 char length allowed
Use only alphanumeric characters

Example: Validating File Integrity

$file = 'example.txt';
$hash = md5_file($file);
echo $hash;

Example: Salting MD5 Hash

$password = 'mypassword';
$salt = 'random_salt';
$hash = md5($password . $salt);
echo $hash; //c945424c71ab824908348bb4f8a1ec38

Security Warning:

MD5 is vulnerable to attacks; use stronger functions like hash('sha256') or password_hash().

String Functions password_hash() function to work with different encryptions

Subhendu Mohapatra

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