PHP variable

Besides more than thousands of built-in functions PHP provides facility to define custom/user defined function. Basic expression to define a custom function and calling a custom function was discussed in previous article. Variable plays an important role in PHP function. PHP function typically has local, global and static variables. A PHP programmer should know how to use local, global and static variable in PHP function. So, in this article I will discuss how to define and use local, global and static variables inside a PHP function. Variables in PHP Function According to variable scope and usage in PHP function, variable can be categorized into the following three types. PHP local variable in function PHP static variable in function PHP global variable in function PHP Local Variable in Function Local variables are those variables which are defined and used within a PHP function. So, if we define a variable within a PHP function, the variable will be local variable. After executing the function, defined local variables will be erased from the memory. So, we cannot reuse local variable outside of a function. If we use a local variable outside of a function, PHP compiler will show an error message.   The following […]

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