Here are three basic types of runtime errors in PHP
- 1. Notices: These are trivial, non-critical errors that
PHP encounters while executing a script - for example, accessing a
variable that has not yet been defined. By default, such errors are not
displayed to the user at all - although you can change this default
behavior.
- 2. Warnings: These are more serious errors - for example,
attempting to include() a file which does not exist. By default, these
errors are displayed to the user, but they do not result in script
termination.
- 3. Fatal errors: These are critical errors - for example, instantiating an object of a non-existent class, or calling a non-existent function. These errors cause the immediate termination of the script, and PHP's default behavior is to display them to the user when they take place.
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