3v4l.org

run code in 200+ PHP versions simultaneously
<?php class Foo { public $dummy1; public $dummy2; } class ErrorHandler { private $private = 'THIS IS PRIVATE'."\n"; function __construct() { set_error_handler( function ($errno, $errstr, $errfile, $errline) { $this->handleError($errno, $errstr, $errfile, $errline); } ); } private function handleError($errno, $errstr, $errfile, $errline, $errmodule = null) { echo __METHOD__. " dealing with error $errstr, $errfile:$errline\n"; // This attribute is no longer accessible in this object. Same for other // objects and their private attributes once we reach in this state. echo $this->private; echo "Never executed in PHP7.2; there is a fatal error in the line above\n"; } } function reproduceBug(Foo $f) { unset($f->dummy2); foreach ((new ReflectionObject($f))->getProperties() as $p) echo $p->getName() .' = '. $p->getValue($f) ."\n"; echo "This line is not reached in PHP7.2; but it is reached in PHP 7.0\n"; } $errorHandler = new ErrorHandler(); #echo $x; # uncommenting this fixes it reproduceBug(new Foo);
based on HWETd
Output for 7.0.7 - 7.0.33, 7.2.12 - 7.4.1
dummy1 = ErrorHandler::handleError dealing with error Undefined property: Foo::$dummy2, /in/9ScMs:39 THIS IS PRIVATE Never executed in PHP7.2; there is a fatal error in the line above dummy2 = This line is not reached in PHP7.2; but it is reached in PHP 7.0
Output for 7.1.0 - 7.2.11
dummy1 = ErrorHandler::handleError dealing with error Undefined property: Foo::$dummy2, /in/9ScMs:39 Fatal error: Uncaught Error: Cannot access private property ErrorHandler::$private in /in/9ScMs:28 Stack trace: #0 /in/9ScMs(17): ErrorHandler->handleError(8, 'Undefined prope...', '/in/9ScMs', 39) #1 [internal function]: ErrorHandler->{closure}(8, 'Undefined prope...', '/in/9ScMs', 39, Array) #2 /in/9ScMs(39): ReflectionProperty->getValue(Object(Foo)) #3 /in/9ScMs(48): reproduceBug(Object(Foo)) #4 {main} thrown in /in/9ScMs on line 28
Process exited with code 255.
Output for 5.6.0 - 7.0.6
dummy1 = dummy2 = This line is not reached in PHP7.2; but it is reached in PHP 7.0