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run code in 300+ PHP versions simultaneously
<?php $s = "Bearer 1a2b3c4d"; preg_match('~Bearer\s(?P<access_token>\S+)~', $s, $m); var_dump($m);
Output for 4.3.3 - 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, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.21, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
array(3) { [0]=> string(15) "Bearer 1a2b3c4d" ["access_token"]=> string(8) "1a2b3c4d" [1]=> string(8) "1a2b3c4d" }
Output for 4.3.0 - 4.3.2
array(2) { [0]=> string(15) "Bearer 1a2b3c4d" [1]=> string(8) "1a2b3c4d" }

preferences:
218.18 ms | 401 KiB | 314 Q