Error handling question/problem

appletalk

Hi,

I'm fairly new to PHP and am trying to integrate some code that I've downloaded from the web. What I need help with is in situations when an error is generated.

Here's the code:

$complete = $info['files'][hex2bin($infohash)]['complete'];

I believe this calls a function from the script that I downloaded and it's suppose to return a number depending on information from another source (website). If the information is not present, then it returns an error:

Notice: Undefined index: (¡ï "€#WyÉr‹@ÇAYŒË in \web\index_main.html on line 153

My question is: Are there any ways I can catch this error when it occurs?

If {$complete = $info['files'][hex2bin($infohash)]['complete'] generates ERROR} then ($complete = 0)

It would be necessary for this function to absorb the error as well so that it doesn't get reported to standard output.

Or is there something similar to the Expect Tcl function "catch" where

catch ($info['files'][hex2bin($infohash)]['complete']😉 will return TRUE if an error occurs and FALSE otherwise.

I've seen many custom error handling functions but they seem cryptic to me.

Thanks in advance for any help possible.

PHPdev

I assume you are speaking of the hex2bin() funciton, since it is the only one I see in that line of code. The if() could be used but it is only going to check the assignment into $complete. So what you can do is something like this

if ($bin = hex2bin())

assign the results of hex2bin()

Now this all depends on what hex2bin returns when it encounters an error, for all hex2bin knows it just converts hex to binary, and return it, no matter what you feed in... Garbage in Garbage out... so you need to look at that function and see what it returns..

Hope this helps...

PHPdev

appletalk

I'm not can't tell if what hex2bin returns by looking at it whether the function will generate an error or not...

Good case:
hex2bin(infohash) is *÷DIÝ"}ˆä%Ø!züãÃ´ (minus the ***)

Error case:
hex2bin(infohash) is *²¿í”( ôcÂÅ çÊ[‘†½° (again minus the ***)
Notice: Undefined index: ²¿í”( ôcÂÅ çÊ[‘†½° in \web\index_main.html on line 121

I did go along with using the IF statement to filter the error.

if (!$complete){
$complete = '0';
}

This seems to work. I also added "error_reporting (1); " to the top of the file and that is filtering out all the notices.

So things are looking good now :-) .

Thanks for your help !!!!