How To Access a Global Variable inside a Function

Q

How To Access a Global Variable inside a Function? - PHP Script Tips - Creating Your Own Functions

✍: FYIcenter.com

A

By default, global variables are not accessible inside a function. However, you can make them accessible by declare them as "global" inside a function. Here is a PHP script on declaring "global" variables:

<?php
?>
$intRate = 5.5;
function myAccount() {
  global $intRate;
  print("Defined inside the function? ". isset($intRate)."\n");
}
myAccount();
print("Defined outside the function? ". isset($intRate)."\n");
?>

This script will print:

Defined inside the function? 1
Defined outside the function? 1

2007-04-24, 5320👍, 0💬

Can You Define an Array Argument as a Reference Type
Can You Define an Array Argument as a Reference Type? - PHP Script Tips - Creating Your Own Functions You can define an array argument as a reference type in the function definition. This will automatically convert the calling arguments into references. Here is a PHP script on how to define an array... 2007-04-24, 5401👍, 0💬

What Is the Scope of a Variable Defined outside a Function
What Is the Scope of a Variable Defined outside a Function? - PHP Script Tips - Creating Your Own Functions A variable defined outside any functions in main script body is called global variable. However, a global variable is not really accessible globally any in the script. The scope of global vari... 2007-04-24, 5399👍, 0💬

How To Specify Argument Default Values
How To Specify Argument Default Values? - PHP Script Tips - Creating Your Own Functions If you want to allow the caller to skip an argument when calling a function, you can define the argument with a default value when defining the function. Adding a default value to an argument can be done like thi... 2007-04-25, 5368👍, 0💬

How To Access a Global Variable inside a Function
How To Access a Global Variable inside a Function? - PHP Script Tips - Creating Your Own Functions By default, global variables are not accessible inside a function. However, you can make them accessible by declare them as "global" inside a function. Here is a PHP script on declaring "global" variab... 2007-04-24, 5321👍, 0💬

What Is the Scope of a Variable Defined in a Function
What Is the Scope of a Variable Defined in a Function? - PHP Script Tips - Creating Your Own Functions The scope of a local variable defined in a function is limited with that function. Once the function is ended, its local variables are also removed. So you can not access any local variable outside... 2007-04-24, 5318👍, 0💬

How To Return an Array from a Function
How To Return an Array from a Function? - PHP Script Tips - Creating Your Own Functions You can return an array variable like a normal variable using the return statement. No special syntax needed. Here is a PHP script on how to return an array from a function: <?php function powerBall() { $a... 2007-04-24, 5253👍, 0💬

How To Return a Reference from a Function
How To Return a Reference from a Function? - PHP Script Tips - Creating Your Own Functions To return a reference from a function, you need to: Add the reference operator "&" when defining the function. Add the reference operator "&" when invoking the function. Here is a PHP script on how to ... 2007-04-14, 5239👍, 0💬

How To Pass Arrays By References
How To Pass Arrays By References? - PHP Script Tips - Creating Your Own Functions Like normal variables, you can pass an array by reference into a function by taking a reference of the original array, and passing the reference to the function. Here is a PHP script on how to pass array as reference: ... 2007-04-24, 5206👍, 0💬

How Values Are Returned from Functions
How Values Are Returned from Functions? - PHP Script Tips - Creating Your Own Functions If a value is returned from a function, it is returned by value, not by reference. That means that a copy of the value is return. Here is a PHP script on how values are returned from a function: <?php $fav... 2007-04-24, 5158👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.