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run code in 300+ PHP versions simultaneously
<?php $host = $_SERVER['HTTP_HOST']; preg_match("/[^\.\/]+\.[^\.\/]+$/", $host, $matches); echo "domain name is: {$matches[0]}\n";
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined array key "HTTP_HOST" in /in/DtCBk on line 2 Deprecated: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in /in/DtCBk on line 3 Warning: Undefined array key 0 in /in/DtCBk on line 4 domain name is:
Output for 8.0.0 - 8.0.30
Warning: Undefined array key "HTTP_HOST" in /in/DtCBk on line 2 Warning: Undefined array key 0 in /in/DtCBk on line 4 domain name is:
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Notice: Undefined index: HTTP_HOST in /in/DtCBk on line 2 Notice: Undefined offset: 0 in /in/DtCBk on line 4 domain name is:
Output for 7.3.32 - 7.3.33, 7.4.26
domain name is:
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Notice: Undefined index: HTTP_HOST in /in/DtCBk on line 2 Notice: Undefined offset: 0 in /in/DtCBk on line 4 domain name is:
preferences:
253.1 ms | 402 KiB | 373 Q