max(array("tdCommon", 0)) => "tdCommon"    // not a number

The documentation at php.net/max claims:
If one or more of the values is a float, all the values will be treated as floats, and a float is returned. If none of the values is a float, all of them will be treated as integers, and an integer is returned. 


Evidently, the behaviour of this function was intended to change (extrapolating from http://bugs.php.net/bug.php?id=2676 (bug # 2676)).

This should be reflected in the documentation.  (I was trying to get the key of the most recent element I had created in a "semi-associative" array by $array[] = $newVal and max as advertised would have done the trick.  Could it still work?  I don't know, because I don't really know what it's supposed to be doing anymore.  For example, what type of sort is being done now?).

Csaba Gabor