PHP password_get_info() Function

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The password_get_info() is an inbuilt PHP function where detailed information regarding the given hash will be returned.

Syntax:

password_get_info(string $hash): array

Parameter: This function accepts a single parameter:

hash: This parameter defines the hash of the password by creating the password_hash() function.

Return Values:

algo: This parameter define which type of password algorithm is used in the password.
algoName: This parameter defines the name of the algorithm in human-readable form.
options: This parameter includes the options provided when calling the password_hash() function.

Example 1: The following code demonstrates the password_get_info() function.

PHP

<?php  
   $a= password_hash("zambiatek", PASSWORD_DEFAULT); 
   var_dump(password_get_info($a)); 
?>

Output:

array(3) {
     ["algo"]=> string(2) "2y"
     ["algoName"]=> string(6) "bcrypt"
     ["options"]=> array(1) {
                     ["cost"]=> int(10)
             }
}

Example 2: The following code demonstrates the password_get_info() function.

PHP

<?php  
   $password = "zambiatek"; 
   $hashedPassword =  
         password_hash($password, PASSWORD_DEFAULT); 
     
   // Retrieve password information 
   $passwordInfo =  
         password_get_info($hashedPassword); 
      
   // Display password information 
   echo "Hash algorithm: " . $passwordInfo['algo'] . "\n"; 
   echo "Hash strength: " . $passwordInfo['algoName'] . "\n"; 
?>

Output:

Hash algorithm: 2y
Hash strength: bcrypt

Reference: https://www.php.net/manual/en/function.password-get-info.php

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