Fatal error: uncaught error: call to undefined function mysql_real_escape_string()

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Please help me to fix this

Fatal error: Uncaught Error: Call to undefined function mysql_real_escape_string() in C:\xampp\htdocs\webdua\pusing\xxx\proses.php:7 Stack trace: #0 {main} thrown in C:\xampp\htdocs\webdua\pusing\xxx\proses.php on line 7

<?php
	$username = $_POST['user'];
	$password = $_POST['pass'];

	$username = stripcslashes($username);
	$password = stripcslashes($password);
	$username = mysql_real_escape_string($username);
	$password = mysql_real_escape_string($password);

	mysql_connect("localhost", "root", "");
	mysql_select_db("masuk");

	$result = mysql_query("select * from pengguna where username = '$username' and password = '$password'")
				or die("failed to query ".mysql_error());
	$row = mysql_fetch_array($result);
	if ($row['username'] == $username && $row['password'] == $password){
		echo "Login sukses ".$row['username'];
	}else{
		echo "failed to login";
	}
?>

What I have tried:

well, i dont know how to fix this :(

Posted 25-Mar-20 12:03pm

Nyssa Ayu

Updated 25-Mar-20 12:14pm

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Comments

Richard Deeming 26-Mar-20 7:52am

Your code is vulnerable to SQL Injection[^]. NEVER use string concatenation to build a SQL query. ALWAYS use a parameterized query.

PHP: SQL Injection - Manual[^]

Richard Deeming 26-Mar-20 7:52am

You're also storing passwords in plain text. Don't do that.
Secure Password Authentication Explained Simply[^]
Salted Password Hashing - Doing it Right[^]

PHP even has built-in functions to help you do the right thing:
PHP: password_hash[^]
PHP: password_verify[^]

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phil.o · Answer 1 · 2020-03-25T12:15:00

Use

PHP

mysqli_real_escape_string()

instead.

You should get used to do simple research like this one: simply typing the error (Call to undefined function mysql_real_escape_string()) in your favourite search engine would have brought you an immediate answer without having to wait for one of us in CP passing by and answering your question.