If we have 2 classes:

class A {
...
  // constructor
  function A() {
    // do things
  }
...
}

class B extends A {
...
  // constructor
  function B() {
    // do things
  }
...
}

When a B object is first created, its constructor is called but the constructor for class A is not.  For things to work as expected, the constructor for class A must be called as with class C below.

class C extends A {
...
  // constructor
  function C() {
    // do things
    // Manually exec the constructor for class A
    $this->A();
  }
...
}

Not that it should matter, but my configure command is below:

'./configure' '--with-apxs=/usr/sbin/apxs' '--enable-track-vars' '--enable-magic-quotes' '--enable-sigchild' '--enable-calendar' '--enable-ftp' '--with-gd=shared' '--with-mysql=/usr/local' '--with-pdflib=shared' '--enable-wddx' '--enable-sysvmem' '--enable-sysvshm' '--with-xml' '--with-zlib' '--with-ttf' '--enable-sockets'