Created attachment 141589 [details]
Find usages before refactoring

Created attachment 141590 [details]
Screen before executing refactor

Created attachment 141591 [details]
File after refactoring.

My initial reference to Find should be Find usages.

It works properly. You try to refactor static function which have to be used with self:: static:: ClassName:: prefix. Calling just a method name calls global function.

This fails with fatal error:

<?php
class TstCls {
    public static function staticFoo() {
        return "Wrong";
    }
    public static function staticBar() {
        echo staticFoo();
    }
}
TstCls::staticBar();
?>

This works and refacoring works as well:

<?php
class TstCls {
    public static function staticFoo() {
        return "Wrong";
    }

    public static function staticBar() {
        echo self::staticFoo();
    }
}
TstCls::staticBar();
?>

Thanks for the PHP lesson!