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run code in 150+ php & hhvm versions
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<?php $answer['message'] = "this is a test message. next is emptyline and here are to empty lines end."; print(preg_replace("/^$/ui", "", str_replace(["\n\r", "\n\n", "\r\r","\r\n"], "\n", $answer['message'])));
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
this is a test message. next is emptyline and here are to empty lines end.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/1tHXQ on line 10
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/1tHXQ on line 10
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/1tHXQ on line 10
Process exited with code 255.