Published in Laravel 5

Laravel 5: Conditionally Throwing Exceptions With throw_if

By John Koster

The throw_if function can be used to throw an exception if the supplied $boolean value evaluates to true. The supplied $parameters will be passed along to the exception's constructor.

#Signature

The signature of the throw_if function is:

1function throw_if(

2    $boolean,

3    $exception,

4    ...$parameters

5);

#Example Use

In the following example we will use the throw_if function to throw an exception when the supplied value is 10:

 1

 2function throwIfExample($value) {

 3    throw_if(

 4        $value == 10,

 5        Exception::class,

 6        'The value must not be 10!'

 7    );

 8

 9    // Do something with the value when it is not 10.

10}

11

12// Will not throw an exception.

13throwIfExample(3);

14

15// Will throw an exception.

16throwIfExample(10);

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