ptiswitz

You’ve got this kind of error because you run PHP in a strict mode.

Strict mode imply to class inheritance that a child function must have the same declaration that his parent.

The following example will throw a strict error :

class A {
   function foo($bar = 0) {}
}

class B extends A {
   function foo($bar) {}
}

The foo function of class B must be like that :

class B extends A {
   function foo($bar = 0) {}
}

For your case, you’ve to copy the exact declaration written in the Walker class file to fix that.

I found my problem, it come from my client theme which use an older version of jquery ui for its administration.

So look at your theme if it uses a specific version of jquery ui.

I hope that it will help you 🙂

Hi,

I’ve the same problem since i’ve update from 3.4.2 to 3.5.1.

When i look at the javascript console, i saw this error message “Uncaught TypeError: Cannot read property ‘length’ of undefined ” in jQuery.

Do you have this message too ?

I think the problem come from jquery loading… 🙂