Fatal error: Uncaught Error: Array callback must have exactly two elements [closed]

Question

I tried a lot but it, again and again, showing same error:

Fatal error: Uncaught Error: Array callback must have exactly two elements",

error is showing on line no.2

if($_SERVER(['REQUEST_METHOD'] == 'POST')){  

Answer 1

$_SERVER is not a function, its an array, you need to remove () after $_SERVER, and your code will look like below

if($_SERVER['REQUEST_METHOD'] == 'POST'){ ... }

PS: as everyone said , your script is open to SQL Injection Attack and Never store passwords in the database as Plain Text. Please follow the guidelines on the comments