Solve the compatibility problem between PHP4.0 and PHP5.0 class constructor

The following is a detailed analysis of PHP4.0 and PHP5.0 class constructor compatibility issues. if you need a friend, refer to PHP5.0 or above, it is also compatible with the definition rules of constructors of version 4.0. If both the constructor 4.0 and the _ construct () function are defined, the _ construct () function takes precedence.
To make the class code compatible with both PHP4.0 and 5.0, you can use the following methods:
The code is as follows:
Class MyClass {
Function _ construct () {// for PHP5.0
Echo 'this is class2 construct ';
}
// To make the class code compatible with both PHP4.0 and 5.0
Function MyClass () {// for PHP4.0
$ This->__ construct ();
}
}
$ C3 = new MyClass;
?>