[Solved] warning of mysqli_real_escape_string() for this code [closed]

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Your parameters are in the wrong order, read the documentation again. For example:

$username = mysqli_real_escape_string(trim($_POST["username"]), $db);

Should be:

$username = mysqli_real_escape_string($db, trim($_POST["username"]));

See http://php.net/mysqli_real_escape_string (the procedural style) for the right parameter order.

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solved warning of mysqli_real_escape_string() for this code [closed]