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PHP has one of the best encryption functions for data security. Hash_hmac()The encrypt function is one of the most famous encryptors.

We'll show you how to use hash_hmacand sha256encryptors to create 安全签名one that you can store in a database or use in your login form.

hash_hmac()Functions in PHP

hash_hmac()Creates an alphanumeric keyed secret hash value. It utilizes HMACa cryptographic authentication technique called the method.

grammar:

hash_hmac($algo, $data, $key, $binary = false);

1. $algoIs one of the hash_hmac parameters and is used as the signature secret keyed hash value ( String).
2. $data, a hashed value (usually the user's password). It can be alphanumeric.
3. $keyis generated from HMACthe method, it is the key you get from the function, and for other programmatic uses.
4. The last parameter $binaryis a binary value.

It TRUEreturns the raw data when , and FALSEthrows out lowercase hex when .

In PHP use hash_hmac()andsha256

example:

<?php
//sha256 is a $algo
$Password= 'ThisIS123PasswORD' ; //data
$secret ="ABCabc"; //$key
//false is bool value to check whether the method works or not
$hash_it = hash_hmac("sha256", utf8_encode($Password), $secret, false);  //all four parameters
if(!$hash_it){ //checks true or false
	echo "Password was not encrypted!";
}
echo "Your encrypted signature is:<b> '.$hash_it.' </b>";
?>

Output:

Your encrypted signature is: '.46e9757dc98f478c28f035cfa871dbd19b5a2bf8273225191bcca78801304813

Use hash_hmac()andbase64_encode()

If you want your cryptographic signature to be more secure, you can also execute the following code snippet.

example:

<?php
$my_sign = "abc123";
$key = TRUE;
 $base64_encode = base64_encode(hash_hmac('sha256', $my_sign, $key, true));
if(!$base64_encode){
echo "Your signature with the base64_decode(hash_hmac()); failed";
}
else{
echo "Your base64_decode(hash_hmac()); encrypted signature is is:<b> $base64_encode.' </b>";
}
?>

Output:

Your base64_decode(hash_hmac()); encrypted signature is is: '.00g0QmqlnluXxijqot60WZf6InDi07b/Mb5lL7eVZ34

hash_hmac()Use and sha256apply hex2bin/ bin2hexconvert in PHP

• hex2bin()- This function decodes a binary string that has been encoded in hexadecimal.
• bin2hex()- Use bin2hex()the method to convert an ASCII string to a hexadecimal value.

Suppose you have critical financial data that you want to encrypt and create keys for users.

example:

<?php
$createhashmackey = "2974924872949278487322348237749823";
$bank_acc = "029480247299262947328749287";
$current_bal     = $sum * 10000 / 450;
$bank_locker_no   = 'AC54-A76X';
$last_deposit      = $when;
$se     = hex2bin($createhashmackey);
$create_his_signature     = $bank_acc . $current_bal. $bank_locker_no . $last_deposit;
$enigma = bin2hex(hash_hmac('sha256', $create_his_signature, $se));
echo "The secret signature is.$enigma.";

Output:

The secret signature is.33633066323533383537663538323937373536393764396530343661663336666438636435363631383934363864383966316133633433633965343234336233.

This is the output of all the code examples in this article.