The hash_equals function() is an inbuilt function in PHP which is used to compares two strings using the same time whether they are equal or not.
Syntax:
hash_equals( $known_str, $usr_str )
Parameters: This function accept two parameters as mention above and describe below.
- $known_str: This parameter is used to specify the known length string.
- $usr_str: This parameter is used to specify the user-supplied string.
Return Value: This function returns True if both strings are equal, False otherwise.
Below programs illustrate the hash_equals() function in PHP:
Program 1:
php
<?php// PHP program to illustrate // hash_equals function$known_str = crypt('GFG', 'Hello-GFG');$usr_str = crypt('GFG', 'Hello-GFG');// Compare both strings$res = hash_equals($known_str, $usr_str);// Display resultvar_dump($res);?> |
Output:
bool(true)
Program 2:
php
<?php// PHP program to illustrate // hash_equals function$known_str = crypt('GFG', 'Hello-GFG');$usr_str = crypt('neveropen', 'Hello-GFG');// Compare both strings$res = hash_equals($known_str, $usr_str);// Display resultvar_dump($res);?> |
Output:
bool(false)
Reference: http://php.net/manual/en/function.hash-equals.php
