php custom exceptions

Question

I was wondering how would one go about writing custom exception handlers.

so that I can do something like

throw new dbException($sql, $message);

and have it output

There was an error in your query Message: {$message here}
Query: {$sql here}
Line: {line exception was thrown on}
File: {file exception was thrown from}

but I also want to to catch eg syntax errors and parse errors (if possible)

You'll need a distinct handler for exceptions and errors. Parsing errors usually cannot be catched however. — mario
– mario, Commented Feb 15, 2011 at 20:17
Syntax/Parse errors are uncatchable, because they occur while php is being tokenized (by the lexer) and not in runtime. You can however, catch fatal errors (E_USER_ERROR) but it is your last chance to log any information before the script is being halted. — ludesign
– ludesign, Commented Feb 15, 2011 at 20:17

Community · Accepted Answer · 2017-05-23 11:51:42Z

10

Well, you can extend the Exception class however you like. For custom exceptions, you might want to check out the post:

PHP 5 OOP: Delegation and Custom Exceptions

You should also find this thread useful:

Custom Exception Messages: Best practices

edited May 23, 2017 at 11:51

CommunityBot

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answered Feb 15, 2011 at 20:15

Sarfraz

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Sean Walsh · Accepted Answer · 2011-02-15 20:16:11Z

2

Unless I am misunderstanding your question, you should be able to extend PHP's Exception class.

answered Feb 15, 2011 at 20:16

Sean Walsh

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Comments

user405725 · Accepted Answer · 2011-02-15 20:17:00Z

1

Why don't use just write your own exception class derived from the standard base exception? See extending exceptions manual.

answered Feb 15, 2011 at 20:17

user405725

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