Php manual mysql_query

For all you programmers out there getting the 'Command out of synch' errors when executing a stored procedure call: There are known bugs related to this issue, and the best workaround for avoiding this error seems to be switching to mysqli. Still, I needed mysql to also handle these calls correctly. Somehow, mysql does not handle multiple resultsets correctly, or is at least missing some functionality related to handling multiple results.

One way to reduce the dangers of queries like the dlete command above that dletes the whole DB is to use limits wherever possible. If you have a routine that is only deisnged to delete 1 record, add 'LIMIT 1' to the end of the command.

This way you'll only lose one record if someone does something stupid. You should also check all input, especially if it is sent using GET. Just don't trust ANY data that is sent to your script.

HTH Allen. Even if local users are trusted, there is always the possibility of a rogue script PHP or some nastier language being installed by an ignorant user.

That script might then read your. The phpinfo function will print these values clear as day. I highly suggest against this method of storing MySQL authentication information.

I recommend creating connect and cleanup functions in a separate include file. If security is a concern, locate the include file outside of your web root folder. If you encounter speed problems using this command to a distant server, you can add the line "skip-name-resolve" in your my.

This was in Windows XP. This eventually cleared up. I made sure to stop the service. Then, I downloaded a zipped binary-package from dev. Making sure it was stopped, I started the regular server from the commandline, and that was then successful.

I then stopped it and started it via the Services panel, and everything still worked. I'm assuming that when the service was restarted initially, there was a component that had died and refused to be shutdown even though the service appeared to be stopped, but shutting it down via mysqladmin killed everything entirely.

For example, add the following to your hosts file changing the bogus ip to your server's real ip : If your server ever gets assigned a different ip, just update the hosts file with the new one every script will work as-is, even if under different hostnames. I just wanted to share a common wrapper that I use for executing one line SQL statements. In MySQL4.

Also if you are using old MySQL tables on a new server i. Hopefully this will help someone, it had me confused for a while because some of the users on my 4. Note that named pipe on Windows is unusable since PHP 5. Another solution to the security problems of putting usernames and passwords into scripts. I haven't found this documented anywhere else so thought I'd suggest it for the online documentation. When calling multiple stored procedures, you can run into the following error: "Commands out of sync; you can't run this command now".

This can happen even when using the close function on the result object between calls. The cryptic "Couldn't fetch mysqli" error message can mean any number of things, including: 1. You're trying to use a database object that you've already closed as noted by ceo at l-i-e dot com. Your MySQLi object has been serialized and unserialized for some reason. Define a wakeup function to re-create your database connection.

You mixed OOP and functional calls to the database object. Stored Procedures. I like to save the query itself in a log file, so that I don't have to worry about whether the site is live. And have it e-mail me when an error is caught, too. Shoe Shoe 72k 32 32 gold badges silver badges bronze badges.

Easier to read if do the assignment before the if. I spend a lot of time in my career debugging other people's code So we can check if returned array representation of query isn't empty by doing like this if! Shahnawaz Akhtar Shahnawaz Akhtar 5 5 silver badges 3 3 bronze badges. No, don't use empty. Lots of other stackoverflow posts talk about doing so causing mistakes, when a value could be 0 or '0' , in php these are equal to false.

Moore G. Moore 67 1 1 bronze badge. Upvoted as a valid, clear, option. That guarantees that you are testing only for "boolean false". Toki Toki 3 3 silver badges 7 7 bronze badges. In procedural style: if! Community Bot 1 1 1 silver badge. Amirouche Douda Amirouche Douda 1, 1 1 gold badge 21 21 silver badges 30 30 bronze badges. The if-case will always be true, unless there is a failure e.