Solve PHP4.0 and PHP5.0 class constructor compatibility problem _ PHP Tutorial

Solve the compatibility problem between PHP4.0 and PHP5.0 class constructor. PHP5.0 and later versions are compatible with the definition rules of constructor 4.0. If both the constructor 4.0 and the _ construct () function are defined, the _ construct () function takes precedence. PHP5.0 and later versions are compatible with the definition rules of constructor 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;
?>

PHP5.0 and later versions are compatible with the definition rules of constructor 4.0. If the constructor 4.0 and the _ construct () function are defined at the same time, the _ construct () function takes precedence ....