PHP Errors
Let's learn about PHP errors and how to use them.
We'll cover the following...
Using exceptions to stop the execution
As a programmer, you can use exceptions to stop the execution of a function or an entire script. Throwing an exception means there is a problem, and you can’t continue. Once you throw an exception, the remaining code in the function or script will no longer be executed:
throw new RuntimeException('Something went wrong');echo 'This will never appear on the page';
Using PHP errors
Besides exceptions, PHP has another mechanism for dealing with problems: PHP errors.
PHP errors are used to indicate that something is wrong, but they don’t necessarily stop the execution of the script.
When you open a file using fopen() but the file doesn’t exist, you will get a PHP error of type “warning”.
But this doesn’t stop the execution of the script.
Let’s find out how that works by putting the following code in oops.php:
<?phpfopen(__DIR__ . '/this-file-does-not-exist', 'r');echo 'PHP does not stop execution, even when it triggers an error';//throw new RuntimeException('Something went wrong');
Note that the throw new RuntimeException(...) statement was commented out, so this script will no longer throw an exception.
Now start the PHP server in development mode (with only php.ini):
php -S 0.0.0.0:8000 -t public/ -c php.ini
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