DVWA-7.3 SQL Injection（SQL注入）-High

<?php

if( isset( $_SESSION [ ‘id‘ ] ) ) {
    // Get input
    $id = $_SESSION[ ‘id‘ ];

    // Check database
    $query  = "SELECT first_name, last_name FROM users WHERE user_id = ‘$id‘ LIMIT 1;";
    $result = mysqli_query($GLOBALS["___mysqli_ston"], $query ) or die( ‘<pre>Something went wrong.</pre>‘ );

    // Get results
    while( $row = mysqli_fetch_assoc( $result ) ) {
        // Get values
        $first = $row["first_name"];
        $last  = $row["last_name"];

        // Feedback for end user
        $html .= "<pre>ID: {$id}<br />First name: {$first}<br />Surname: {$last}</pre>";
    }

    ((is_null($___mysqli_res = mysqli_close($GLOBALS["___mysqli_ston"]))) ? false : $___mysqli_res);        
}

?>