Laravel 5: Conditionally Throwing Exceptions With throw_if

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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