I had a function in some of my code that I wanted to trigger a notice error on certain occasions. Unfortunately, it kept halting my script with a Warning instead. Unfortunately, the error handler at that particular block of code was not properly capturing the error string. It runs out that I was triggering an E_NOTICE instead of an E_USER_NOTICE error… (if I would have reviewed the trigger_error manual page, I wouldn’t have made this mistake… silly, lazy developer). Just to make sure that I fully understood this issue and hopefully wouldn’t make the same mistake again, I made a quick proof of concept:
From the comments on the manual page, I was able to grab a pre-made function that I stripped down. It prints out the error type as well as the error string. My test script also generates an error.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | <?php function my_error_handler($errno, $errstr, $errfile, $errline){ switch($errno){ case E_ERROR: print "Error"; break; case E_WARNING: print "Warning"; break; case E_PARSE: print "Parse Error"; break; case E_NOTICE: print "Notice"; break; case E_CORE_ERROR: print "Core Error"; break; case E_CORE_WARNING: print "Core Warning"; break; case E_COMPILE_ERROR: print "Compile Error"; break; case E_COMPILE_WARNING:print "Compile Warning"; break; case E_USER_ERROR: print "User Error"; break; case E_USER_WARNING: print "User Warning"; break; case E_USER_NOTICE: print "User Notice"; break; case E_STRICT: print "Strict Notice"; break; case E_RECOVERABLE_ERROR:print "Recoverable Error"; break; default: print "Unknown error ($errno)"; break; } print '<br />string: ' . $errstr; } set_error_handler('my_error_handler'); ?> |
Now, when I do the following:
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Our output is predictable: User Notice string: test error
However, I was forgetting to put the USER in that error:
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And my error:
Warning string: Invalid error type specified
So just a reminder, you can only trigger errors in the USER class.