3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $obj = new stdClass; $obj->{123} = '456'; // defined property but unusable as obj->property; see below. print_r($obj); echo 'Via {123}: ' . $obj->{123},"\n"; if (isset($obj->{123})) { echo '123 is set',"\n";} if (property_exists($obj,123)) echo 'property 123 exists',"\n"; echo $obj->{123}; //echo "\n",$obj->123; // Parse error: ...unexpected '123' (T_LNUMBER), expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$' echo "\n..............................\n"; $obj->{'a123'} = $obj->{123}; print_r($obj); echo 'Via Property a123: ' . $obj->a123,"\n"; // making a hash out of property a $obj->a["123"] = $obj->{'123'}; $obj->a["a123"] = $obj->{'a123'}; var_dump($obj); echo 'Via Property "a" and hashkey "123": ' . $obj->a["123"],"\n"; // contrast: $obj = (object)array('123' => '456'); // '123' => 123 and identifers must be strings print_r($obj); echo $obj->{'123'},"\n"; // so "Undefined property: stdClass::$123" if (!property_exists($obj,'123')) echo 'property 123 does not exist',"\n"; $obj = new stdClass; $obj->name = "blabe"; echo "The rain in {$obj->name} ...";
based on OceYY
Output for 5.2.6 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
stdClass Object ( [123] => 456 ) Via {123}: 456 123 is set property 123 exists 456 .............................. stdClass Object ( [123] => 456 [a123] => 456 ) Via Property a123: 456 object(stdClass)#1 (3) { ["123"]=> string(3) "456" ["a123"]=> string(3) "456" ["a"]=> array(2) { [123]=> string(3) "456" ["a123"]=> string(3) "456" } } Via Property "a" and hashkey "123": 456 stdClass Object ( [123] => 456 ) Notice: Undefined property: stdClass::$123 in /in/AMqjj on line 24 property 123 does not exist The rain in blabe ...
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.1.0 - 5.2.5
stdClass Object ( [123] => 456 ) Via {123}: 456 123 is set property 123 exists 456 .............................. stdClass Object ( [123] => 456 [a123] => 456 ) Via Property a123: 456 object(stdClass)#1 (3) { ["123"]=> string(3) "456" ["a123"]=> string(3) "456" ["a"]=> array(2) { [123]=> string(3) "456" ["a123"]=> string(3) "456" } } Via Property "a" and hashkey "123": 456 stdClass Object ( [123] => 456 ) Notice: Undefined property: stdClass::$123 in /in/AMqjj on line 24 property 123 does not exist The rain in blabe ...
Output for 5.0.0 - 5.0.5
stdClass Object ( [123] => 456 ) Via {123}: 456 123 is set Fatal error: Call to undefined function property_exists() in /in/AMqjj on line 7
Process exited with code 255.
Output for 4.3.3 - 4.4.9
Fatal error: Property name must be a string in /in/AMqjj on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.2

Process exited with code 139.