How to secure hash and salt for PHP passwords?

PHP

Salting and hashing: In PHP, saving a password using salting and hashing is done with the password_hash() method. This method takes three parameters and returns the final hash of this password. Syntax:

string password_hash (string $pass, int $algo, array $options)

Parameters :

$pass: This parameter contains the password that must be protected and stored in the database.
$algo: defines the hashing algorithm, which is used to create the $pass hash. Some of the algorithm options in php are:
PASSWORD_DEFAULT: use bcrypt algorithm (default in PHP 5.5.0). This constant is intended to change over time as new and stronger algorithms are added to PHP.
PASSWORD_BCRYPT: This is the CRYPT_BLOWFISH algorithm for generating the hash. Result on a 60 character string, or FALSE on error.
$options: salted part. Requires salt in a cost form factor. Optionally, if left blank, a default value is added to the string (in most cases it is 10). Note that a higher cost leads to a more secure password and thus increases CPU utilization.

Return Value: Returns a hashed password and FALSE on error . Example: This example demonstrates reading password_hash(), generating a hash, and comparing it.

       
  // Save the string to a variable  $password  =  `Password` ;  
  // Use the password_hash() function for 
  // generate password hash $hash_default_salt  = password_hash (  $password ,   PASSWORD_DEFAULT);  $hash_variable_salt  = password_hash (  $password ,   PASSWORD_DEFAULT,  array  (  `cost`  = > 9));  
  // Use the password_verify() function for 
  // check if the password matches echo  password_verify (< / code>  `Password` ,   $hash_default_salt ).  "< br >" ;  echo  password_verify ( ` Password` ,   $hash_variable_salt ).  "< br >" ;  echo  password_verify ( ` Password123` ,   $hash_default_salt );  
 ?>  Output:  1 1 0
 This example uses the password_verify() method to compare the generated hash with the string entered as a parameter. It takes a hash and a comparison string as parameters and returns true if the password is correct, otherwise it returns false.

How to secure hash and salt for PHP passwords?

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