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run code in 150+ php & hhvm versions
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<?php $s = fsockopen("www.jakpsatweb.cz",80);
Output for 5.2.6 - 7.1.0
Warning: fsockopen(): php_network_getaddresses: getaddrinfo failed: Name or service not known in /in/te48T on line 2 Warning: fsockopen(): unable to connect to www.jakpsatweb.cz:80 (php_network_getaddresses: getaddrinfo failed: Name or service not known) in /in/te48T on line 2
Output for 5.0.3 - 5.2.5
Warning: fsockopen(): php_network_getaddresses: getaddrinfo failed: Name or service not known in /in/te48T on line 2 Warning: fsockopen(): unable to connect to www.jakpsatweb.cz:80 (Unknown error) in /in/te48T on line 2
Output for 5.0.0 - 5.0.2
Warning: fsockopen(): php_network_getaddresses: gethostbyname failed in /in/te48T on line 2 Warning: fsockopen(): unable to connect to www.jakpsatweb.cz:80 (Unknown error) in /in/te48T on line 2
Output for 4.3.3 - 4.3.4, 4.3.10 - 4.4.9
Warning: fsockopen(): php_network_getaddresses: getaddrinfo failed: Name or service not known in /in/te48T on line 2 Warning: fsockopen(): unable to connect to www.jakpsatweb.cz:80 in /in/te48T on line 2
Output for 4.3.5 - 4.3.9
Warning: fsockopen(): php_network_getaddresses: gethostbyname failed in /in/te48T on line 2 Warning: fsockopen(): unable to connect to www.jakpsatweb.cz:80 in /in/te48T on line 2
Output for 4.3.2
Warning: fsockopen(): php_network_getaddresses: getaddrinfo failed: Name or service not known (is your IPV6 configuration correct? If this error happens all the time, try reconfiguring PHP using --disable-ipv6 option to configure) in /in/te48T on line 2 Warning: fsockopen(): unable to connect to www.jakpsatweb.cz:80 in /in/te48T on line 2
Output for 4.3.0 - 4.3.1

Process exited with code 139.