Where is globals php

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Powered by W3. NET Reference. CSS Examples. NET Examples. A static variable exists only in a local function scope, but it does not lose its value when program execution leaves this scope. Consider the following example:. Example 4 Example demonstrating need for static variables. Example 5 Example use of static variables. Static variables also provide one way to deal with recursive functions.

A recursive function is one which calls itself. Care must be taken when writing a recursive function because it is possible to make it recurse indefinitely.

You must make sure you have an adequate way of terminating the recursion. Example 6 Static variables with recursive functions. Static variables can be assigned values which are the result of constant expressions, but dynamic expressions, such as function calls, will cause a parse error. Example 7 Declaring static variables. Note : Static declarations are resolved in compile-time. PHP implements the static and global modifier for variables in terms of references.

For example, a true global variable imported inside a function scope with the global statement actually creates a reference to the global variable. This can lead to unexpected behaviour which the following example addresses:. A similar behaviour applies to the static statement. References are not stored statically:. Variable variables ». Submit a Pull Request Report a Bug. Variable scope The scope of a variable is the context within which it is defined.

Using static variables Another important feature of variable scoping is the static variable. References with global and static variables PHP implements the static and global modifier for variables in terms of references. Some interesting behavior tested with PHP5 , using the static-scope-keyword inside of class-methods. Having an object is just a collection of properties, the functions remain at the class. So if you declare a variable as static inside a function, it's static for the whole class and all of its instances, not for each object.

Maybe it's senseless to post that.. Please note for using global variable in child functions: This won't work correctly Easy Normal Medium Hard Expert. Writing code in comment?

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