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<?php $xml = new SimpleXMLElement('<root><elem>Text</elem></root>'); echo 'elem2 is: ' . ($xml->elem2 ?? 'backup string'); echo 'elem2 is: ' . (isset($xml->elem2) ? $xml->elem2 : 'backup string');
Output for 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
elem2 is: backup stringelem2 is: backup string
Output for 7.0.0 - 7.0.10
elem2 is: elem2 is: backup string
Output for 5.6.0 - 5.6.25
Parse error: syntax error, unexpected '?' in /in/DF8AE on line 5
Process exited with code 255.

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