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Variable Scope
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Kyle B. Johnson
July 23, 2015
Programming
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130
Variable Scope
Kyle B. Johnson
July 23, 2015
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Transcript
Functions, Arguments, and Returns Variable Scope
Global Scope
Global Scope The Global Scope is the main context of
an Application. Variables in the Global Scope of a PHP application are accessible anywhere after the variable has been declared.
Global Scope
Application Input Output
Functions
Functions Functions are blocks of code which can be used
more than once within an application.
Functions
Functions Functions create a relationship between Input and Output. In
PHP, a function’s input is called the Argument list and the output is called the Return statement.
Function $args $return
Functions
Application Input Output Function $args $return
Functions
Object Oriented Programming
Classes
Classes
Class $args $return Method $args
Application Input Output Class $args $return Method $args Class $args
$return Method $args Class $args $return Method $args Class $args $return Method $args