将 PHP 变量插入 MySQL

Question

I'm making a small game to pass time in PHP, and for that, I use a database in MySQL. But, everytime that I check on if it inserted the variables into the database, it doesn't show up.
This is the query that I'm using:

$sql = "
INSERT INTO `Users`
    (
        Username, 
        Class, 
        Level, 
        Health, 
        Max_Health, 
        Mana, 
        Max_Mana, 
        Intelligence, 
        Strength, 
        Dexitery, 
        Endurance, 
        Vitality, 
        Experience, 
        Required_Experience, 
        Gold, 
        Equiped_Armor, 
        Equiped_Weapon, 
        Inventory_Slot1, 
        Amount1, 
        Inventory_Slot2, 
        Amount2, 
        Inventory_Slot3, 
        Amount3, 
        Inventory_Slot4, 
        Amount4, 
        Inventory_Slot5, 
        Amount5, 
        Inventory_Slot6, 
        Amount6, 
        Inventory_Slot7, 
        Amount7, 
        Inventory_Slot8, 
        Amount8, 
        Inventory_Slot9, 
        Amount9, 
        Inventory_Slot10, 
        Amount10, 
        Skill_1, 
        Skill_2, 
        Skill_3, 
        Skill_4, 
        Skill_5, 
        Skill_6, 
        Skill_7, 
        Location
    ) 
    VALUES 
    (
        ".$Username.", 
        ".$Class.", 
        ".$Level.", 
        ".$Health.", 
        ".$Max_Health.", 
        ".$Mana.", 
        ".$Max_Mana.", 
        ".$Intelligence.", 
        ".$Strength.", 
        ".$Dexitery.", 
        ".$Endurance.", 
        ".$Vitality.", 
        ".$Experience.", 
        ".$Req_Experience.", 
        ".$Gold.", 
        ".$Equiped_Armor.", 
        ".$Equiped_Weapon.", 
        ".$Inventory_Slot1.", 
        0, 
        ".$Inventory_Slot2.", 
        0, 
        ".$Inventory_Slot3.", 
        0, 
        ".$Inventory_Slot4.", 
        0, 
        ".$Inventory_Slot5.", 
        0, 
        ".$Inventory_Slot6.", 
        0, 
        ".$Inventory_Slot7.", 
        0, 
        ".$Inventory_Slot8.", 
        0, 
        ".$Inventory_Slot9.", 
        0, 
        ".$Inventory_Slot10.", 
        0, 
        ".$Skill_1.", 
        ".$Skill_2.", 
        ".$Skill_3.", 
        ".$Skill_4.", 
        ".$Skill_5.", 
        ".$Skill_6.", 
        ".$Skill_7.", 
        'Town'
    )";
mysql_query($sql, $link);

I have absolutely no idea what I'm doing wrong, so some help would be very much appreciated. Thank you in advance.

Answer 1

You can try echoing out the query in PHP before executing it.

echo $query;

You can then run the echoed out query in your mysql shell or phpmyadmin to see why it isn't getting executed.

Answer 2

您需要将查询中的值引用为如下所示：

$sql = "INSERT INTO `Users`(Username, Class, Level) VALUES ('$Username', '$Class', '$Level');

Answer 3

'Probably it's because of capitalized column names (ex. U sername). Type those names in grave accents `

 $sql = "INSERT INTO `Users`(`Username`, `Class`, ...

also variables other than numerical should be in quotes

$sql = "INSERT INTO `Users`(`Username`, `Class`, ..., `Map`) 
VALUES ('".$Username."', '".$Class."', ... , '".$Map."')";