$my_array, but there is no such entry. PHP responds by creating an empty value and logging a warning. Warnings are indicators of bugs and mistakes.
php.ini, PHP will have an error reporting level. Everything below that level will be ignored or considered a warning. Everything above it will be considered an error. This can vary from server to server.
@operator. It's used to hide errors and warnings in code, but it doesn't do what people expect it to do.
@works by setting the error reporting level on a command so that no error is logged. It doesn't prevent the error from happening, which is what people expect it to do. This can mean fatal errors are not caught or logged. Avoid using the
@operator, and treat all instances of it with suspicion.