Operator Overloading in PHP

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Summary

This article explains how operator overloading works in PHP, and how to implement operator overloading in a PHP extension using C/C++.

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• Operator Overloading  What is operator overloading.
• Opcodes in PHP  Opcodes in the Zend implementation of PHP.
• Opcode Handlers  Handlers of PHP opcodes.
• Overloading Operators  How to overload PHP operators.
• Notes  Caveats and suggestions.
• Examples  Working examples of operator overloading.

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