Why is it important to ensure that the class being used for throwing exceptions actually exists in the PHP script?

It is important to ensure that the class being used for throwing exceptions actually exists in the PHP script because if the class does not exist, a fatal error will be thrown, causing the script to terminate. To solve this issue, you should always check if the class exists before throwing an exception to prevent any fatal errors. 

if (!class_exists('CustomException')) {
    throw new Exception('CustomException class not found');
}

Keywords

class exceptions PHP script error exists

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