Php update mysql prepared statement
I'm trying to learn the proper way to use prepared statements to avoid SQL injections etc. When I execute the script I get a message from my script saying 0 Rows Inserted, I expect this to say 1 Rows Inserted and of course update the table. I'm not entirely sure on my prepared statement, as I've done some research and I mean it varies from example to example. When I'm updating my table do I need to declare all the fields or is it ok to just update one field?? Any information would be very helpful. index.php
classes/class.Scripts.inc
Dharman♦ 27.7k21 gold badges75 silver badges126 bronze badges asked Aug 19, 2013 at 14:37
7
Re your questions:
This is because you reversed the order of parameters when you bound them. So you're searching the id column for the numeric value of your $content, which is probably interpreted as 0. So the UPDATE's WHERE clause matches zero rows.
It's okay to set just one column in an UPDATE statement. Other columns will not be changed. answered Aug 19, 2013 at 14:48
Bill KarwinBill Karwin 510k83 gold badges643 silver badges803 bronze badges 6 In fact, prepared statements are not that complex as it's shown in the other answer. Quite contrary, a prepared statement is the most simple and tidy way to execute a query. Take, for example, your case. You need only three lines of code!
As simple as 1-2-3! Note that checking every function's result manually is just insane, it would only bloat your code without any benefit. Instead you should configure mysqli to report errors automatically once for all. To do so, add the following line before
the result will be pretty much the same as with trigger_error but without an single extra line of code! As you can see, the code could be very simple and concise, if used properly. answered May 18, 2017 at 15:13
Your Common SenseYour Common Sense 156k39 gold badges208 silver badges331 bronze badges I want to clean up Bill Karwin's awesome code
I recommend using "or die" instead of if clause I recommend forcing a variable type to take values:
answered May 20, 2020 at 12:14
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