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Php Mysql_query Error Handling

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Thanks to all - sorry to back out like this. And in these incidents, most of the time, the whole database connections were down. This can be very confusing/irritating to the user. Why isn't tungsten used in supersonic aircraft? navigate here

NogDog, for a tested live system. PHP: PDO transaction example. But, basically you want to check if there are any rows, before trying to bring back the results. Once you hit three or more error checks in a code block, exceptions become more readable.

Mysqli Query Php

share|improve this answer edited Feb 16 '11 at 17:02 answered Feb 16 '11 at 16:36 Yahel 7,14921327 In this situation, mysql_query() should return FALSE when MySQL server crashes, the How to prove that a paper published with a particular English transliteration of my Russian name is mine? link_identifier The MySQL connection. Have you at least looked at it to see if it is syntactically correct?

share|improve this answer answered Nov 8 '10 at 16:10 Evan Mulawski 38.3k980124 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google nothing matched. Register Help Remember Me? Mysql_query Insert The time now is 12:37 AM.

There are several ways to debug your SQL usage: Firstly, always check your code is actually correct - use the MySQL monitor to try your queries out to make sure they How to heal religious units? echo mysql_error(); The above line will print the error returned by mysql database if the query fails to execute. have a peek here Previous company name is ISIS, how to list on CV?

SpikeZ 2013-07-30 20:30:22 UTC #18 Drummin said: http://www.w3.org/TR/html4/interact/forms.html#adef-method Strictly speaking that is. Select Query In Php With Where Clause Secondly, remember that mysqli_query() will return false if the query failed to execute, which means you can test its return value to see whether your SQL statement is faulty. What kind of weapons could squirrels use? How to make Twisted geometry more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life

Php Mysql Query Example

Post navigation ← Conspiracy theorists are idiots. http://stackoverflow.com/questions/1918624/php-try-and-catch-for-sql-insert Top All times are GMT -4. Mysqli Query Php If you are not comfortable with SQL any time you can refer the materials in sql section. Mysql_query Select Does AAA+BBB+CCC+DDD=ABCD have a solution for distinct digits A,B,C,D?

or a server issue in that the server is for some reason not processing the posted form. check over here Subscribed! You jerkfaces from Pod Six need to cut it out. –Andrew Heath Mar 10 '10 at 5:55 add a comment| 9 Answers 9 active oldest votes up vote 6 down vote Once you have connection established then we can execute sql command by using PHP function mysql_query(). Mysql_fetch_array In Php

make sure that $_GET['id'] is not NULL or == "", is a number that is positive, not 0 (generally, I know this doesn't apply to some table types, but it applies But if that does not concern you too much, what you could do is create a little custom die function to control what gets output depending on the debug status: PHP My answer deals with the cause not with the symptom. –Yahel Feb 16 '11 at 16:57 Méa culpa, I did not understand your comment. his comment is here Instead, you should "handle" it via a custom exception handler.┬áThis can be achieved with the function set_exception_handler.

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Php Select Case See also MySQL: choosing an API guide and related FAQ for more information. Unfortunately, the (outdated) mysql_* extension in PHP does not support exception handling.

You can read more on mysql error here.

How do you say "you all" in Esperanto? for showing the error, you can eg. $result = mysql_query($query) or die ("Error in query: $query. ".mysql_error()); . I know, passed a lot of time and the question is already checked answered but I got a different answer and it may be helpful. Mysql Query Where Note: Not directly related to you question but I think it would much more better if you display something usefull to the user.

corresponding MySQL errno for duplicate key entry const MYSQL_DUPLICATE_KEY_ENTRY = 1022; // user defined MySQL exceptions class MySQLException extends Exception {} class MySQLDuplicateKeyException extends MySQLException {} function my_mysql_query($query, $conn=false) { $res Or do we always have to add die() or add error_handling blocks below every query even they are fully tested for the live site (I only see the problem when database You then tried to retrieve the first field in the first row of that result set, a row which doesn't exist. weblink You may have to register before you can post: click the register link above to proceed.

Tim ¶8 years ago It should be noted that mysql_query can generate an E_WARNING (not documented). SpikeZ 2013-07-30 08:13:14 UTC #10 Dump out the POST array to see if submit is a value within it. Why do jet engines smoke? If you need to do the check later do something like: $result = mysql_query($sql); $error = mysql_error() != '' ?

but never.... Perhaps you'd like to post the complete form logic that is not working. Please add more details to the answer like where to add the line of code and a link explaining the code in detail? –Ram Oct 17 '14 at 0:51 if($rt){echo " Command is successful ";} else {echo "Command is not successful ";} So from the above line we can know that the query has worked or failed.

Browse other questions tagged php mysql or ask your own question. But coder should know all features of the language he is coding on. i have not yet tested correctly but it should work fine.

$buscar = mysql_query("SELECT k.*, e.Clasificacion FROM cat_plan_k k, cat_equipo e WHERE Tipo='$tipo' AND k.ID_Eq=a.ID_Eq");
while ($row=mysql_fetch_array($buscar))

Reply With Quote 05-31-2007,02:37 PM #3 NogDog View Profile View Forum Posts Visit Homepage High Energy Magic Dept. Note that this covers the point you handle the error; if you're talking about signaling errors, you'll wind up with different guidelines. –outis Dec 17 '09 at 0:59 add a comment| What is the possible impact of dirtyc0w a.k.a. "dirty cow" bug? Data inside the query should be properly escaped.

Try checking with "mysql_num_rows" in your "if" statement: if (!mysql_num_rows($result3)) { share|improve this answer answered Feb 16 '11 at 16:38 tcarter2005 1921415 add a comment| up vote 0 down vote Mysql_query Carrying Metal gifts to USA (elephant, eagle & peacock) for my friends Why isn't tungsten used in supersonic aircraft? It's not always terrible helpful, particularly if you have a large query. A query that returns no rows is not an error. –Álvaro González Feb 16 '11 at 16:45 The error the OP reported is caused by the mysql_result command because

I'm about to try a different approach by calling a separate function to do a bit of sanitisation and then do the query. A better, more-flexible approach would be to throw an exception if the query fails:PHP $result = mysql_query($sql, $connection); if($result === false){ throw new Exception(mysql_error($connection)); }1234$result = mysql_query($sql, $connection);if($result === false){throw new It will return false if it fails, which you can log (or whatever you want to do) and then continue. $rv = mysql_query("INSERT INTO redirects SET ua_string = '$ua_string'"); if (