What are the most common PHP errors?

There are several common PHP errors that developers may encounter:

1. Parse errors: These occur when PHP is unable to parse your code due to syntax errors. This can happen when you forget a semicolon, parentheses, or quotation marks. You could learn how to fix PHP Parse Errors in detail.
2. Undefined variable errors: These occur when you try to use a variable that hasn’t been defined yet. This can happen when you misspell a variable name or forget to initialize it.
3. Function undefined errors: These occur when you try to call a function that hasn’t been defined yet. This can happen when you misspell a function name or forget to include the file that contains the function.
4. Division by zero errors: These occur when you try to divide a number by zero. PHP will return a warning and set the result to NaN (Not a Number).
5. Fatal errors: These occur when PHP encounters an error that it cannot recover from. These errors will cause PHP to stop executing the script.
6. Memory allocation errors: These occur when PHP runs out of memory while executing a script. This can happen when you try to allocate too much memory for a variable or array.
7. Timezone errors: These occur when PHP encounters an error related to timezone settings. This can happen when you try to use date/time functions without setting the timezone first.
8. File not found errors: These occur when PHP is unable to locate a file that you’re trying to include or require. This can happen when you specify the wrong path or when the file doesn’t exist.
9. Access denied errors: These occur when PHP is unable to access a file or directory due to insufficient permissions. This can happen when the file or directory is owned by a different user or group.