Php Reusing Code And Writing Functions

Reusing Code and Writing Functions All about functions, arguments, passing by reference, globals and scope

Introduction ,[object Object],[object Object]

Why function? ,[object Object],[object Object],[object Object],[object Object]

Example of function ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Typical format for a function ,[object Object]

Arguments ,[object Object],[object Object],[object Object]

Example of arguments ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object]

Return a value ,[object Object],[object Object],[object Object]

Examples ,[object Object],[object Object],[object Object],[object Object]

Examples cont….. ,[object Object],[object Object],[object Object],[object Object],[object Object]

Examples cont….. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Marching arguments order ,[object Object],[object Object]

Examples of argument order ,[object Object],[object Object]

Default value for arguments ,[object Object],[object Object]

Examples ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Function functions ,[object Object],[object Object],[object Object]

Example ,[object Object],[object Object],[object Object],[object Object]

Globals ,[object Object],[object Object]

Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Example cont… ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Passing by value and reference ,[object Object],[object Object],[object Object]

Passing by value ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Passing by reference ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object]

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