From: si at tinypla dot net Operating system: RHEL3 PHP version: 5.1.1 PHP Bug Type: SimpleXML related Bug description: Empty objects returned from simplexml_load_string evaluate to false.
Description: ------------ Hi All, Firstly, this covers ground in <a href="http://bugs.php.net/bug.php?id=35028";>bug #35028</a> and is related, but more specific. php 5.1.1 appears to interpret standard empty objects as "true" (as did 5.0.x). Unlike 5.0.x (and StdClass() in 5.1.1) empty objects returned from the simpleXML parser in 5.1.1 appear to be evaluated as "false" when queried in an if() statement. I know we should all be using isset(), but not all programmers play by these rules, and code which was made based on 5.0.x's way of doing it doesn't work. If I try and include this code in my app, it breaks. It could be argued that this logic is counter intuitive. Reproduce code: --------------- function runTest($object){ if($object) { echo "php 5.1.1 evaluates object as true\n"; } else { echo "php 5.1.1 evaluates object as false\n"; } var_dump($object); } $object0 = new StdClass(); $object1 = simplexml_load_string('<foo attr="value">bar</foo>'); $object2 = simplexml_load_string('<foo attr="value"></foo>'); $object3 = simplexml_load_string('<foo attr="value" />'); runTest($object0); runTest($object1); runTest($object2); runTest($object3); Expected result: ---------------- php 5.1.1 evaluates object as true object(stdClass)#1 (0) { } php 5.1.1 evaluates object as true object(SimpleXMLElement)#2 (1) { [0]=> string(3) "bar" } php 5.1.1 evaluates object as true object(SimpleXMLElement)#2 (0) { } php 5.1.1 evaluates object as true object(SimpleXMLElement)#2 (0) { } Actual result: -------------- php 5.1.1 evaluates object as true object(stdClass)#1 (0) { } php 5.1.1 evaluates object as true object(SimpleXMLElement)#2 (1) { [0]=> string(3) "bar" } php 5.1.1 evaluates object as false object(SimpleXMLElement)#2 (0) { } php 5.1.1 evaluates object as false object(SimpleXMLElement)#2 (0) { } -- Edit bug report at http://bugs.php.net/?id=35899&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=35899&r=trysnapshot44 Try a CVS snapshot (PHP 5.1): http://bugs.php.net/fix.php?id=35899&r=trysnapshot51 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=35899&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=35899&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=35899&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=35899&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=35899&r=needscript Try newer version: http://bugs.php.net/fix.php?id=35899&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=35899&r=support Expected behavior: http://bugs.php.net/fix.php?id=35899&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=35899&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=35899&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=35899&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=35899&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=35899&r=dst IIS Stability: http://bugs.php.net/fix.php?id=35899&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=35899&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=35899&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=35899&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=35899&r=mysqlcfg
