How to solve the compatibility of PHP4.0 and PHP5.0 class constructors

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In versions above PHP5.0, it is also compatible with the definition rules of constructors in version 4.0. If both the 4. 0 constructor and the _ _ construct () function are defined, the _ _ construct () function takes precedence.

To make your class code compatible with both PHP4.0 and 5.0, you can do the following:

The code is as follows:

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