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run code in 200+ php & hhvm versions
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<?php $dbconn = pg_connect("host=localhost dbname=publishing user=www password=foo") or die('No se ha podido conectar: ' . pg_last_error());
Output for 7.0.0 - 7.2.11
Fatal error: Uncaught Error: Call to undefined function pg_connect() in /in/i7ueM:3 Stack trace: #0 {main} thrown in /in/i7ueM on line 3
Process exited with code 255.
Output for hhvm-3.22.0
Warning: pg_last_error() expects exactly 1 parameter, 0 given in /in/i7ueM on line -1 No se ha podido conectar:
Output for hhvm-3.15.4, hhvm-3.18.4 - 3.21.3
Warning: pg_last_error() expects exactly 1 parameter, 0 given in /in/i7ueM on line 4 No se ha podido conectar:
Output for hhvm-3.17.3

Process exited with code 137.
Output for hhvm-3.11.1, hhvm-3.13.2
Fatal error: Uncaught Error: Call to undefined function pg_connect() in /in/i7ueM:3 Stack trace: #0 {main}
Process exited with code 255.
Output for hhvm-3.12.14
Fatal error: Uncaught Error: Call to undefined function pg_connect() in /in/i7ueM:3 Stack trace: #0 {main}
Process exited with code 137.
Output for 5.0.0 - 5.6.38, hhvm-3.10.1
Fatal error: Call to undefined function pg_connect() in /in/i7ueM on line 3
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: pg_connect() in /in/i7ueM on line 3
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: pg_connect() in /in/i7ueM on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: pg_connect() in /in/i7ueM on line 3