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  • How to create global variable in php

    • Global variable in php example!

    PHP - Global Variables

    In PHP, any variable that can be accessed from anywhere in a PHP script is called as a global variable.

    Static variable in php

  • Static variable in php
  • Variable scope in php
  • Global variable in php example
  • Php global keyword
  • Php global variable in function

    • If the variable is declared outside all the functions or classes in the script, it becomes a global variable.

    While global variables can be accessed directly outside a function, they aren’t automatically available inside a function.

    Example

    In the script below, $name is global for the function sayhello().

    <?php $name = "Amar"; function sayhello() { echo "Hello " .

    $name; } sayhello(); ?>

    However, the variable is not accessible inside the function. Hence, you will get an error message "Undefined variable $name".

    Hello PHP Warning: Undefined variable $name in /home/cg/root/93427/main.php on line 5

    Example

    To get access within a function, you need to use the "global" keyword before the variable.

    <?php $name = "Amar"; function sayhello() { GLOBAL $name; echo "Hello " .

    $name; } sayhello(); ?>

    It will produce the following output −

    Hello Amar

    If a function accesses a global variable and modifies it, the modified value

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