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<?php $input = '[Tue Jun 18 22:25:32 BST 2013] NeoThermic likes B*witched - C"est La Vie'; $bracketpos = strpos($input, '['); $endbracketpos = strpos($input, ']'); $datestamp = substr($input, $bracketpos + 1, $endbracketpos - $bracketpos); $result = strtotime($datestamp); var_dump($datestamp); var_dump($result);
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
string(29) "Tue Jun 18 22:25:32 BST 2013]" bool(false)
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5
string(29) "Tue Jun 18 22:25:32 BST 2013]" int(-1)

preferences:
230.7 ms | 402 KiB | 356 Q