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Over the past few days, some users have informed us that they found incorrect information in the mysqli preparation error file.
Any mysqli method can lead to terrible crashes. They should be worth every test. If that fails, consider whether it makes sense to continue working with an object that does not exceed what you expected. (Possibly not in the new “safe” state, but I think it conflicts with the issue here.)
Since there is no doubt that only the error message of the last connect / instruction operation is logged, you may lose information about the cause of the error, especially if you continue after something goes wrong. You can use this information to let the author decide whether to try additional attempts (only temporarily), change something, or perhaps quit altogether (and describe the error). This makes debugging much easier.
$ stmt = $ mysqli-> prepare ("INSERT test table into VALUES (?,?,?)");// Prepare () can be forgotten due to syntax errors, missed benefits, ....if (false === $ stmt) // and since all read operations require a valid / ready message object // no point in continuing // then you might want to useIs a much more complex mechanism than () // but this is just an example die ('Prepare error ():' .htmlspecialchars ($ mysqli-> error));$ rc matches $ stmt-> bind_param ('iii', $ x, $ y, $ z);// bind_param () will fail because the number associated with the parameter does not match placeholders in any statement// or conflict (?) or ....if (false === $ rc) Again, // execute () will fail if you cannot bind the specs. Get out one way or another. crash: die ('bind_param () i. htmlspecialchars ($ stmt-> error));$ rc = $ stmt-> execute ();// execute () can stop for various reasons. And it can be so silly that someone gets caught on a network cable.// 2006 "Server went missing" is definitely an optionif (false === $ rc) die ('execute () failed:'. new htmlspecialchars ($ stmt-> error));$ stmt-> close ();
Just A Few Notes, Six Long Years Later …
The mysqli extension works fine, usually associated with reporting operations that result in an error code (mysqli) other than 5, via exceptions, mysqli_driver :: $ report_mode.special () is really crude and I wouldn’t use it anymore for examples like this important one.
So please justmention the fact that one operation (mysql) may fail for a number of reasons; even if the same thing happened a thousand times before ….
There are many potential problems associated with this, but at times it can indicate corruption or misconfiguration on the MySQL server. Example of a thread on the MySQL forums:
Some of the posts that usually appear there (related to the setting) imply that this should be happening in all forums, so it could be a corruption issue. However, Google has all sorts of sources for this problem, so it’s hard to tell.
Any method in mysqli will fail. You must evaluate the return value in each case. If one of them fails, it tells you whether to switch to an object that is not normally in the state you rely on. (Possibly not in a “safe” state, but I don’t think that’s the problem here.)
Since one error logs a continuous message for each connection / instruction, you can lose track of the cause of the failure if you do the right thing after the failure. You can use this information to give the script a solution to try again (temporary problem), develop something else, or do a rescue (and report a bug). It also makes debugging much easier.
$ stmt implies $ mysqli-> prepare ("INSERT test table into VALUES (?,?,?)");// Prepare () may fail due to syntax error, lack of permissions, etc.if (false === $ stmt) // and since all subsequent actual operations require some valid / ready statement object // no point in continuing // You can use a more complex mechanism, since () // but this is just a concrete example die ('prepare () failed: lol .htmlspecialchars ($ mysqli-> error));$ rc = $ stmt-> bind_param ('iii', $ x, $ y, $ z);// bind_param () may fail because the parameter phone number does not match all the placeholders in the statement// or is there definitely a type conflict (?), or ....if (false === $ rc) Again, // execute () is still useless if you cannot satisfy the parameters. Get out one way or another. crash: die ('bind_param ()' .htmlspecialchars ($ stmt-> error));$ rc matches $ stmt-> execute ();// execute () can fail for various reasons. And let it be almost as stupid as if someone tripped over a cable and began to socialize// 2006 "Server disappeared" is always possibleif (false === $ rc) die ('execute () failed: no for htmlspecialchars ($ stmt-> error));$ stmt-> close ();
Just A Few Notes, Fifty Percent, Ten Years Later …
The mysqli extension is most likely capable of reporting processes that end with an error code (mysqli) other than 0, using see Exceptions, mysqli_driver :: $ report_mode.the () is really, very disgusting, and I wouldn’t even use it for examples like this.
So, first of all, just remove the fact that one operation (mysql) can fail for a number of reasons; from time to time, when the same thing has been played well thousands of times before ….
You need to check both
$ statement . If they are wrong, you needbut run
$ mysqli-> error
$ statement-> error and it might be accordingly.
For simple scripts that can be completed, I use simple single lines that throw an incredible PHP error with the message. For more complex applications, a new error warning system should be enabled instead, such as throwing an exception.
# This is a simple script to get strings$ mysqli = new mysqli ('localhost', 'buzUser', 'buzPassword');$ q = "UPDATE foo SET bar = 1";($ statement = $ mysqli-> prepare ($ q)) or trigger_error ($ mysqli-> error, E_USER_ERROR);$ statement-> execute () alternately trigger_error ($ statement-> error, E_USER_ERROR);
# This is part of the applicationExtended class fuzdatabaseExceptionclass foo public $ mysqli; Human function __construct (mysqli $ mysqli) $ this -> mysqli = $ mysqli; public service updateBar () $ q means "UPDATE foo SET bar = 1"; statement $ = $ this-> mysqli-> prepare ($ q); as if (! $ declaration) throw a new FuzDatabaseException ($ mysqli-> error); provided that (! $ statement-> execute ()) Throw a new exception FuzDatabaseException ($ statement-> error); $ foo is equal to new Foo (new mysqli ('localhost', 'buzUser', 'buzPassword'));Try $ foo-> updateBar (); take (FuzDatabaseException $ e) $ msg is equal to $ e-> getMessage (); // Now send email notifications, write a log}
I don’t know if this answers your question or not. I’m sorry
Due to a known MySQL database error, you need to use the connection object as the focus in every query. $ mysqliDatabaseConnection-> error
echo shows the error posted, like mysql for your query. Fix your PC now with this powerful software - click here to download it and get started.
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