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import pymysql

def login(username, password):
    db = pymysql.connect("localhost", "root", "password", "database")
    cursor = db.cursor()
    
    sql = "SELECT * FROM users WHERE username = '%s' AND password = '%s'" % (username, password)
    cursor.execute(sql)
    
    data = cursor.fetchone()
    db.close()
    
    return data

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import pymysql

def login(username, password):
    db = pymysql.connect("localhost", "root", "password", "database")
    cursor = db.cursor()
    
    sql = "SELECT * FROM users WHERE username = %s AND password = %s"
    cursor.execute(sql, (username, password))
    
    data = cursor.fetchone()
    db.close()
    
    return data

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<?php
$target_dir = "uploads/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = strtolower(pathinfo($target_file,PATHINFO_EXTENSION));

// ¼ì²éÎļþÀàÐÍ
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
    echo "Ö»ÔÊÐíÉÏ´«Í¼Æ¬Îļþ.";
    $uploadOk = 0;
}

// ¼ì²éÎļþ¾Þϸ
if ($_FILES["fileToUpload"]["size"] > 500000) {
    echo "ǸØÆ£¬ÎļþÌ«´ó.";
    $uploadOk = 0;
}

// ÉúÑÄÉÏ´«Îļþ
if ($uploadOk == 0) {
    echo "ǸØÆ£¬ÎļþδÉÏ´«.";
} else {
    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
        echo "ÎļþÉÏ´«ÀÖ³É.";
    } else {
        echo "ǸØÆ£¬ÎļþÉÏ´«Ê§°Ü.";
    }
}
?>

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<?php
$user_input = $_GET['input'];
echo "<p>" . $user_input . "</p>";
?>

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