1.2.1296. Unused Exception Variable

The variable from a catch clause is not used. It is expected to be used, either by chaining the exception, or logging the message.

In PHP 8.0, this variable may be omitted.

<?php

try{
    doSomething();
} catch (A $a) {
    // $a is caught, but not used here
} catch (B $b) {
    // $b is caught, and used
    log($b->getMessage());
} catch (C) {
    // Caught and ignored (PHP 8.0 +)
}

?>

1.2.1296.1. Connex PHP features

• exception

1.2.1296.1.1. Suggestions

• Drop the variable in the clause expression (PHP 8.0 and more recent)

• Chain the exception

• Log the exception message

1.2.1296.1.2. Specs

Short name	Exceptions/UnusedExceptionVariable
Rulesets	All, Changed Behavior, Suggestions
Exakat since	2.2.0
PHP Version	All
Severity	Minor
Time To Fix	Quick (30 mins)
Precision	High
Available in	Entreprise Edition, Exakat Cloud