Mysql查询成功，但没有更新

Question

I'm working on an RPG-type battle system for a friend and have run into frustrating issues with a mysql query. Also, no lectures on the semantics of mysql_ functions, please.

$sql = "UPDATE `user_pets` SET `curhp` = `hitpoints`, `curmp` = `misticpower`, `pet_status` = '0' WHERE `id` = '" .$arrayPet['id']. "'";
if ( mysql_query($sql) {
    echo "Success";
}

This comes back as success every time in the application. However, nothing is actually happening in the database. I've echo'd the query itself and ran it in phpmyadmin and the "healing" is completed properly. However, WHATEVER is actually happening when this query executes, it is not what is desired.

Any recommendations for troubleshooting, or can you see anything wrong with the query itself?

$arrayPet['id'] is taken from the user_pets table and is a valid ID.

Answer 1

First thing I recommend is not wrapping $arrayPet['id'] in single quotes... I'm assuming it's an integer.

Second is if the function mysql_query() returns successfully, it doesn't necessarily mean anything got updated. It just means the query executed successfully on the server. Your query looks like all it does is set some strings and set pet_status to 0. Please provide:

1. An actual sample of a row of the data from user_pets
2. What you expect the row to look like after this query runs

Answer 2

try this:

$sql = "UPDATE user_pets SET curhp = 'hitpoints', curmp = 'misticpower', pet_status = '0' WHERE id = '" .$arrayPet['id']. "'";
$result = mysql_query($sql);

if ($result) {
echo "Success";

}

More importantly, check your $arrayPet['id']: does it return an integer or string value? If it's an integer type, then don't put it inside single quote. Just do something like this:

... WHERE id = $arrayPet['id']";