Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we will be discussing about the PHP Global Variables.
A global variable in PHP can be accessed in any part of the program. Nevertheless, to be modified, a global variable must be explicitly declared to be global in the function in which it is to be modified. This can be effortlessly achieved by placing the keyword GLOBAL in front of the variable that should be identified as global.
Placing this keyword in front of an already existing variable informs PHP to make use of the variable having that name.
A global variable in PHP can be accessed in any part of the program. Nevertheless, to be modified, a global variable must be explicitly declared to be global in the function in which it is to be modified. This can be effortlessly achieved by placing the keyword GLOBAL in front of the variable that should be identified as global.
Placing this keyword in front of an already existing variable informs PHP to make use of the variable having that name.
Example
The following below is a simple example -
<?php $somevar = 30; function addit() { GLOBAL $somevar; $somevar++; print "Somevar is $somevar"; } addit(); ?>
Output
When the above code is executed, it will produce the following result -
Somevar is 31
READ: PHP Function Parameters
Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial guide, we are going to be discussing about the PHP Function Static Variables.
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Feel free to ask your questions where necessary and we will attend to them as soon as possible. If this tutorial was helpful to you, you can use the share button to share this tutorial.
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Thanks for reading and bye for now.