Error types in PHP:

In PHP, we have four types of errors. They are...

1. Notices: 
• These are non-critical errors that PHP encounters while executing a script. These errors will not stop the execution of the program. 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 behaviour is to display them to the user when they take place.
4. Parse Error: 
• When we make syntax mistake in PHP code like, missing semicolon or any unexpected symbol in code.
• These errors will stop the execution the script.