MAMP shows php errors but no warnings

Question

I use both WAMP and MAMP. I have error_reporting set to E_ALL in both environments. However, if I run the following simple script:

<?php echo $x; ?>

On WAMP, I receive a warning message that says $x has not been initialized. On MAMP, I get a blank screen with no warning.

I find these warnings helpful. Does anyone know how I can turn on these warnings on in MAMP?

Again, in MAMP, I have error_reporting set to E_ALL (6143), and display_errors set to On.

Update: To be clear, I do see fatal error messages on both WAMP and MAMP. However, I only see warning messages on WAMP. I would like to see warnings on MAMP as well.

Answer 1

After ten days of searching, I finally found the answer. Apparently the issue was not WAMP- or MAMP-specific at all.

I am running my scripts within CodeIgniter, and a function called set_error_handler() was suppressing all warnings, even though error_reporting and display_errors were set to show all errors and warnings.

Hopefully this helps someone out there and saves them ten days of bewilderment.