#31010 [NEW]: echo a variable that was unset before breaks output

From: lars_stegelitz at col dot wunderman dot com Operating system: Windows PHP version: 4.3.9 PHP Bug Type: Output Control Bug description: echo a variable that was unset before breaks output Description: ------------ When trying to echo an variable that was previously unset, no output at all is shown. I wrote a small test case (see below) Reproduce code: --------------- class Test { var $values; function Test() { $this->values = array(); } function __get($key, &$value) { $value = @$this->values[$key]; return true; } function __set($key, $value) { $this->values[$key] = @$value; return true; } } overload('Test'); $test = new Test(); $test->xyz = "test"; echo "<br/>1. {$test->xyz}"; unset($test->values['xyz']); echo "<br/>2. {$test->xyz}"; Expected result: ---------------- 1. test Notice: Undefined variable: xyz in <sourcecode> on line <x> 2. Actual result: -------------- Nothing. No output at all. No warning or error in log files or on screen. Not even the echo *before* unsetting the variable shows up. -- Edit bug report at http://bugs.php.net/?id=31010&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=31010&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=31010&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=31010&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=31010&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=31010&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=31010&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=31010&r=needscript Try newer version: http://bugs.php.net/fix.php?id=31010&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=31010&r=support Expected behavior: http://bugs.php.net/fix.php?id=31010&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=31010&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=31010&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=31010&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=31010&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=31010&r=dst IIS Stability: http://bugs.php.net/fix.php?id=31010&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=31010&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=31010&r=float MySQL Configuration Error: http://bugs.php.net/fix.php?id=31010&r=mysqlcfg