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An abstract class is one that defines methods but does not necessarily implement them. You are forced to implement the methods in derived classes. Similar to interfaces but allow you to define code in the base class.<br />
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I like this best:<br />
In a way it's like using error_reporting(E_ALL). &nbsp;To a novice, this is annoying because it shows all of his errors. &nbsp;To a professional this is revealing because it enables him to fix all of his errors.<br />
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where there are 20 or more developers workin on an advanced implementation of a very complex multiple CLASS<br />
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<br />
thanks
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An abstract class is one that defines methods but does not necessarily implement them. You are forced to implement the methods in derived classes. Similar to interfaces but allow you to define code in the base class.

I like this best:
In a way it's like using error_reporting(E_ALL).  To a novice, this is annoying because it shows all of his errors.  To a professional this is revealing because it enables him to fix all of his errors.

where there are 20 or more developers workin on an advanced implementation of a very complex multiple CLASS


thanks

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Please give real world explanations of why a php abstract class is needed.<br />
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What are the limitations.
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Please give real world explanations of why a php abstract class is needed.

What are the limitations.

php abstract class real example

PHP is a widely-used server-side scripting language especially suited for web development, powering tens of millions of sites from Facebook to personal WordPress blogs. PHP is often paired with the MySQL relational database, but includes support for most other mainstream databases. By utilizing different Server APIs, PHP can work on many different web servers as a server-side scripting language.