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<?php echo 'Should see "default value"' . "\n"; $empty_string = ""; $result1 = $empty_string ?: "default value"; var_dump($result1); echo 'Should see "overridden value"' . "\n"; $non_empty_string = "something"; $result2 = $non_empty_string ?: "overridden value"; var_dump($result2);
Output for 5.3.0 - 5.3.29, 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 - 7.2.33, 7.3.0 - 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
Should see "default value" string(13) "default value" Should see "overridden value" string(9) "something"
Output for 5.2.3 - 5.2.17
Parse error: syntax error, unexpected ':' in /in/YpKcP on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
<br /> <b>Parse error</b>: syntax error, unexpected ':' in <b>/in/YpKcP</b> on line <b>3</b><br />
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
<br /> <b>Parse error</b>: parse error, unexpected ':' in <b>/in/YpKcP</b> on line <b>3</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error in <b>/in/YpKcP</b> on line <b>3</b><br />
Process exited with code 255.
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272.94 ms | 401 KiB | 457 Q