Try providing a custom comparison function. Almost for sure, PHP is attempting to "test" the == by a deeper scan than you think. On Fri, November 3, 2006 10:56 am, tamcy wrote: > Hello all, > > I'm new to this list. To not flooding the bug tracking system I hope > to clarify some of my understanding here. > > I am referring to the (now bogus) bug report > http://bugs.php.net/bug.php?id=39356&edit=2. This happens after my > upgrade to PHP 5.2, where the code shown produces a "Fatal error: > Nesting level too deep - recursive dependency?". Same testing code > reproduced below: > > ---------------------------- > <?php > class A > { > public $b; > } > > class B > { > public $a; > } > > $a = new A; > $b = new B; > $b->a = $a; > $a->b = $b; > > $test = array($a, $b); > > var_dump(in_array($a, $test)); > ---------------------------- > > I think this is not rare for a child item to have knowledge about its > parent, forming a cross-reference. > > This code runs with no problem in PHP5.1.6, but not in 5.2. Ilia > kindly points out that "In php 5 objects are passed by reference, so > your code does in > fact create a circular dependency.". I know the passed by reference > rule. What I'm now puzzled is, why this should lead to an error. > > To my knowledge, despite the type-casting issue and actual algorithm, > in_array() should actually do nothing more than: > > function mimic_in_array($search, $list) > { > foreach ($list as $item) > if ($search == $item) > return true; > return false; > } > > Which means: > 1. in_array() isn't multi-dimensional. > 2. in_array() doesn't care about the properties of any object. > > That is, I don't expect in_array() to nest through all available inner > arrays for a match, not to mention those are object properties, not > arrays. > > So here is the question: Why should in_array() throws such a "Fatal > error: Nesting level too deep" error? Why should it care? Is there any > behaviour I don't know? > > Thanks all in advance. > > Tamcy > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > -- Some people have a "gift" link here. Know what I want? I want you to buy a CD from some starving artist. http://cdbaby.com/browse/from/lynch Yeah, I get a buck. So? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
