How can I use an exception without the script dying? - php

Question

I'd like to use an exception for error handling in a part of my code but if the code should fail, I would like the script to continue. I want to log the error though. Can someone please help me figure this out?
try{
if($id == 4)
{
echo'test';
}
}
catch(Exception $e){
echo $e->getMessage();
}
echo'Hello, you should see me...'; <------ I never see this.. No errors, just a trace.

Answer 1

You have to catch the exception :
// some code
try {
// some code, that might throw an exception
// Note that, when the exception is thrown, the code that's after what
// threw it, until the end of this "try" block, will not be executed
} catch (Exception $e) {
// deal with the exception
// code that will be executed only when an exception is thrown
echo $e->getMessage(); // for instance
}
// some code, that will always be executed
And here are a couple of things you should read :
Exceptions in the PHP manual
Exceptional PHP: Introduction to Exceptions

Answer 2

In the code that is calling the code that may throw an Exception do
try {
// code that may break/throw an exception
echo 'Foo';
throw new Exception('Nothing in this try block beyond this line');
echo 'I am never executed';
throw new CustomException('Neither am I');
} catch(CustomException $e) {
// continue here when any CustomException in try block occurs
echo $e->getMessage();
} catch(Exception $e) {
// continue here when any other Exception in try block occurs
echo $e->getMessage();
}
// script continues here
echo 'done';
Output will be (adding line breaks for readability):
'Foo' // echoed in try block
'Nothing in this try block beyond this line' // echoed in Exception catch block
'done' // echoed after try/catch block
Try/Catch Blocks may also be nested. See Example 2 in the PHP Manual page linked above:
try{
try {
throw new Exception('Foo');
echo 'not getting here';
} catch (Exception $e) {
echo $e->getMessage();
}
echo 'bar';
} catch (Exception $e) {
echo $e->getMessage();
}
echo 'done';
'Foo' // echoed in inner catch block
'bar' // echoed after inner try/catch block
'done' // echoed after outer try/catch block
Further reading at DevZone:
http://devzone.zend.com/node/view/id/666
http://devzone.zend.com/article/679-Exceptional-Code---PART-2
http://devzone.zend.com/node/view/id/652
http://devzone.zend.com/article/653-PHP-101-PART-12-BUGGING-OUT---PART-2