1.2.301. Could Use Try

Some commands may raise exceptions. It is recommended to use the try/catch block to intercept those exceptions, and process them.

• / : DivisionByZeroError

• % : DivisionByZeroError

• intdiv() : DivisionByZeroError, ArithmeticError

• << : ArithmeticError

• >> : ArithmeticError

• Phar\:\:mungserver : PharException

• Phar\:\:webphar : PharException

Some exceptions have an extra analysis, due to special detection condition : ParseError, with eval() and DivisionByZeroError.

<?php

function division(int $a, int $b) {
     // This expression might generate a DivisionByZeroError, and require a try/catch for error handling purposes.
     return $a / $b;
}

?>

See also Predefined Exceptions and PharException.

1.2.301.1. Connex PHP features

• try-catch

• exception

• arithmeticerror

• divisionbyzeroerror

• imagickexception

• imagickpixelexception

• invalidargumentexception

• jsonexception

• mysqli_sql_exception

• pdoexception

• pharexception

• reflectionexception

• svmexception

• typerror

• unexpectedvalueexception

1.2.301.1.1. Suggestions

• Add a try/catch clause around those commands

• Add a check on the values used with those operator : for example, check a dividend is not 0, or a bitshift is not negative

1.2.301.1.2. Specs

Short name	Exceptions/CouldUseTry
Rulesets	All, Suggestions
Exakat since	1.5.0
PHP Version	All
Severity	Minor
Time To Fix	Quick (30 mins)
Precision	High
Examples	Mautic
Related rule	eval() Without Try, Check Division By Zero
Available in	Entreprise Edition, Exakat Cloud