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<?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 $obj->{123}; // Parse error: ...unexpected '123' (T_LNUMBER), expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$' $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} ...";
Output for git.master, git.master_jit, rfc.property-hooks
stdClass Object ( [123] => 456 ) Via {'123'}: 456 123 is set property 123 exists 456stdClass 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 ) 456 The rain in blabe ...

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