PHP ─ Object Oriented Programming .................................................................................................... 170
Object Oriented Concepts ........................................................................................................................... 170
Defining PHP Classes ................................................................................................................................... 171
Creating Objects in PHP ............................................................................................................................... 172
Calling Member Functions ........................................................................................................................... 172
Constructor Functions ................................................................................................................................. 173
Destructor .................................................................................................................................................... 174
Inheritance .................................................................................................................................................. 174
Function Overriding ..................................................................................................................................... 175
Public Members ........................................................................................................................................... 175
Private members ......................................................................................................................................... 175
Protected members ..................................................................................................................................... 176
Interfaces ..................................................................................................................................................... 177
Constants ..................................................................................................................................................... 177
Abstract Classes ........................................................................................................................................... 177
Static Keyword ............................................................................................................................................. 178
Final Keyword .............................................................................................................................................. 178
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