dkLab | Constructor | PHP_Exceptionizer: converting E_NOTICE to Exception
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On the page: Usage sample Value for script debugging Value for mass mailing generation |
Discuss at the ForumSimple, but a very useful library PHP_Exceptionizer automatically converts notices (E_NOTICE), warnings (E_WARNING) etc. into PHP exceptions.
Usage sample
| Listing 2 |
// Somewhere in the script initialization code.
error_reporting(E_ALL);
if (<is debug mode active>) {
$exceptionizer = new PHP_Exceptionizer(E_ALL);
// And let this variable along, taking care it is not deleted
// until the script end. Deletion of this variable causes
// PHP_Exceptionizer turning off.
}
...
// Below you could catch notices as exceptions:
try {
echo $undefinedVariable;
} catch (E_NOTICE $e) {
echo "Notice raised: " . $e->getMessage();
}
...
// If you catch E_WARNING, you also catch E_NOTICE:
try {
echo $undefinedVariable;
} catch (E_WARNING $e) {
echo "Warning or better raised: " . $e->getMessage();
}
...
// You could not to catch anything, so a notice will cause script termination.
echo $undefinedVariable; |
Value for script debugging
It is handy to use this library during web script development process. You should develop in error_reporting = E_ALL mode and keep in mind that even a small notice during the developement often causes a fatal error.
 |
A typical example when notices may be |
Of course, on production server you must not turn notices into exceptions (to be on a safe side), but just read them in log files.
Value for mass mailing generation
Imagine that you have created a script which sends mails to millions of site subscribers, and the mail text is generated dynamically, depending on user's profile or their friends. Once you upon could think that it is very dangerous to run this script... What if a small mistake would cause millions of persons to receive mails with empty fields or even broken?
PHP_Exceptionizer allows to minimize this risk greatly if you turn on
the library before generating and sending of each mail.
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