What are some circumstances under which this code...

[World Wide Weird]

... will print a blank white page? None of the functions use try/catch blocks or other error handling techiques. If they contained faulty code or triggered a runtime error, it would print an error message - right?

error_reporting(E_ALL);

$var1 = "something";
$var2 = $var1 . " else";
if (empty($var1)) {
  echo "Debugging message 1";
  doSomething();
}
else {
  echo "Debugging message 2";
  if ($var2 == "something else") {
    echo "Debugging message 3";
    doSomethingElse($var1);
  }
  else {
    echo "Debugging message 4";
    doAnotherThing();
  }
} 

I should also point out that essentially the same code worked well the week before last.

Moderators: I previously posted this to the JavaScript forum by mistake. As you may guess, I've had a very long day trying to figure this out. Please delete that thread.

[glenngould]

What are some circumstances under which this code...
... will print a blank white page?

It would always print -at least- "Debugging message 2" and then "Debugging message 3" wouldn't it?

[World Wide Weird]

It would always print -at least- "Debugging message 2" and then "Debugging message 3" wouldn't it?

In a sane and orderly universe, I think it would. But we're talking about where I work.

[glenngould]

Then let us know the cause when you find one I'm curious.

[oddz]

I get debugging message 2 and 3. You could try using strcmp() instead of equality.

[wheeler]

try adding this as well:

ini_set('display_errors', 1); 

My guess is one of the two functions is either unavailable or has a syntax error.

[World Wide Weird]

try adding this as well:

ini_set('display_errors', 1); 

My guess is one of the two functions is either unavailable or has a syntax error.

The server wasn't bashful about displaying any and all errors before. Why would it suddenly stop?

[crmalibu]

Maybe someone realized it should be off by default.

Also, output buffering could trap all output.

[sk89q]

Perhaps you should hook in Xdebug or Zend Debugger.

[World Wide Weird]

Then let us know the cause when you find one I'm curious.

There was an errant video player widget on the same dev server as the site I was working on. It was causing seg faults. Someone was modifying a parent class of the widget at the time. I wish I had time to troubleshoot someone else's code because I'm curious about exactly what went wrong. The framework has an insane number of layers of inheritance. I'm surprised it works at all.

[skunkbad]

I get:

Debugging message 2Debugging message 3
Fatal error: Call to undefined function doSomethingElse() in E:\wamp\www\script_library\test.php on line 27

[World Wide Weird]

I get:

Debugging message 2Debugging message 3
Fatal error: Call to undefined function doSomethingElse() in E:\wamp\www\script_library\test.php on line 27

Thanks. I'll have it fixed in a jiffy!