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<?php $str = "id:5918351498722606 sub:001 dlvrd:001 submit date:1410311037 done date:1410311038 stat:DELIVRD err:000 text:New HTTP Test TxtN"; $pattern = '/([^:]+):([A-Z]{2,}|\d+|\w+(?: \w+)*)/'; preg_match_all($pattern, $str, $matches); $res = array_combine((array_map("trim", $matches[1])), $matches[2]); print_r($res);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
Array ( [id] => 5918351498722606 [sub] => 001 [dlvrd] => 001 [submit date] => 1410311037 [done date] => 1410311038 [stat] => DELIVRD [err] => 000 [text] => New HTTP Test TxtN )

preferences:
142.71 ms | 408 KiB | 5 Q