[PHP-BUG] Req #67860 [NEW]: Throw an "acceptable" exception

From:             david dot proweb at gmail dot com
Operating system: Irrelevant
PHP version:      Irrelevant
Package:          PHP Language Specification
Bug Type:         Feature/Change Request
Bug description:Throw an "acceptable" exception

Description:
------------
Imagine that you do ($a / $b), but $b is zero.
So you will receives "Warning: Division by zero.".

You can avoid that by doing @($a / $b), something like that.

But imagine if PHP can thrown an exception that not need be captured.
It is: you can, optionally, capture that, but if not, will only thrown a
notice, instead of warning.

// Supposing that it is the PHP division constructor:
function php_div($a, $b) {
    if($b === 0) {
        throw casual new Exception("Division by zero.");
    }

    return $a / $b;
}

// So if I do:
5 / 0; // Notice: Division by zero.

// But I can do:
try { 5 / 0; }
catch(Exception $e) { ... } // Avoid notice.

// Or even:
@(5 / 0); // Avoid casual Exception.

--

User can throw casual exceptions too.
For instance:

function name_fix($name) {
    ...
    if(name_uncommon($name)) {
        throw casual new Exception("This name is uncommon.");
    }
    ...
    return $name_fixed;
}

echo name_fix("David"); // David
echo name_fix("Hakuna Matata"); // Hakuna Matata + Notice

// When you capture that, statement will be blocked.
try { echo name_fix("Hakuna Matata"); }
catch(Exception $e) { echo "The Hakuna Matata is so uncommon."; }
// -> The Hakuna Matata is so uncommon. (not echo name, not notice)

--

Exception need a new property like `boolean $isCasual`
($e->isCasual()).

--

Note: apply it to "division by zero" is only to examplify my feature
request.


-- 
Edit bug report at https://bugs.php.net/bug.php?id=67860&edit=1
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