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run code in 300+ PHP versions simultaneously
<?php foreach((new ReflectionMethod('DOMNamedNodeMap::getNamedItemNS'))->getParameters() as $parameter) { echo "Parameter name: "; var_dump($parameter->getName()); echo "It is optional: "; var_dump($parameter->isOptional()); if ($parameter->isDefaultValueAvailable()) { echo "Default Value available. It is: "; var_dump($parameter->getDefaultValue()); } else echo "Default value unavailable" . PHP_EOL; if ($parameter->allowsNull()){ echo "Allows null" . PHP_EOL;} }
Output for 8.0.0 - 8.0.13, 8.1rc1 - rc3
Parameter name: string(9) "namespace" It is optional: bool(false) Default value unavailable Allows null Parameter name: string(9) "localName" It is optional: bool(false) Default value unavailable
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.26
Parameter name: string(12) "namespaceURI" It is optional: bool(true) Default value unavailable Parameter name: string(9) "localName" It is optional: bool(true) Default value unavailable
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_OBJECT_OPERATOR in /in/em9Kr on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_OBJECT_OPERATOR in /in/em9Kr on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/em9Kr on line 3
Process exited with code 255.

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