Explanation of Pass by Value and Pass by Reference in PHP

Pass by value in PHP means that a copy of the variable's value is passed to a function, while pass by reference means that the memory address of the variable is passed.

When passing by value, changes made to the parameter inside the function will not affect the original variable outside the function. However, when passing by reference, any changes made to the parameter will also affect the original variable.

Understanding the difference between pass by value and pass by reference is crucial in PHP programming, as it allows you to control how variables are passed and manipulated within your code.