#28145 [NEW]: $this / instanceof issue with static calls of instance functions

From: wf at bitplan dot com Operating system: WindowsXP PHP version: 5.0.0RC1 PHP Bug Type: Class/Object related Bug description: $this / instanceof issue with static calls of instance functions Description: ------------ I am using PHP5 RC2 (couldn't yet select it - have downloaded it a few minutes ago ...) on Windows XP Professional with Apache2.0.49. This bug is similar to #20089 but I'm complaining more about the instanceof issue. The true fix is of course fixing #20089 first. Saying "This is not a bug" is not a good thing with the goal of better object orientation for PHP5 ... When calling an instance function ("->" needed) as a class function ("::") this should either be an error or instanceof for the given class should fail - it looks like a) instanceof returns "" instead of FALSE/0 when this is not the correct instance b) when calling an instance function of another class in a static way this should be an error Reproduce code: --------------- <?php class Foo { function __construct () { echo 'Generating a Foo object <br />'; } function getInstance () { return new Foo(); } function operation () { echo "Foo operation this is a ".get_Class($this)."<br>"; echo "This is a Foo: ".$this instanceof Foo."<br>"; } function baroperation () { Bar::operation(); } } class Bar { function __construct () { echo 'Generating a Bar object <br />'; } function getInstance () { return new Bar(); } function operation () { echo "Bar operation this is a ".get_Class($this)."<br>"; echo "This is a Bar: ".$this instanceof Bar."<br>"; } function fooOperation () { Foo::operation(); } } $foo = Foo::getInstance(); $bar = Bar::getInstance(); $foo->operation(); $bar->operation(); $foo->baroperation(); $bar->foooperation(); Foo::operation(); Bar::operation(); ?> Expected result: ---------------- Generating a Foo object Generating a Bar object Foo operation this is a Foo This is a Foo: 1 Bar operation this is a Bar This is a Bar: 1 error Bar operation but this is a Foo This is a Bar: 0 error Foo operation but this is a Bar This is a Foo: 0 Foo operation this is a nil This is a Foo: 0 Bar operation this is a nil This is a Bar: 0 Actual result: -------------- Generating a Foo object Generating a Bar object Foo operation this is a Foo This is a Foo: 1 Bar operation this is a Bar This is a Bar: 1 Bar operation this is a Foo This is a Bar: Foo operation this is a Bar This is a Foo: Foo operation this is a This is a Foo: Bar operation this is a This is a Bar: -- Edit bug report at http://bugs.php.net/?id=28145&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=28145&r=trysnapshot4 Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=28145&r=trysnapshot5 Fixed in CVS: http://bugs.php.net/fix.php?id=28145&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=28145&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=28145&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=28145&r=needscript Try newer version: http://bugs.php.net/fix.php?id=28145&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=28145&r=support Expected behavior: http://bugs.php.net/fix.php?id=28145&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=28145&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=28145&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=28145&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=28145&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=28145&r=dst IIS Stability: http://bugs.php.net/fix.php?id=28145&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=28145&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=28145&r=float