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run code in 150+ php & hhvm versions
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<?php $x = openssl_pkey_new(); $csr = openssl_csr_new(["countryName" => "DE"], $x, ["x509_extensions" => 0xDEADBEEF]); ?>
Output for 5.4.32 - 7.1.0
Output for 5.4.15 - 5.4.31

Process exited with code 139.
Output for 5.4.0 - 5.4.14
Fatal error: Call to undefined function openssl_pkey_new() in /in/EKI0F on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/EKI0F on line 3
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/EKI0F on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/EKI0F on line 3
Process exited with code 255.