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<?php preg_match("/^010200060000\|(.|\n)?$/","^010200060000|"); echo $matches[1]; // 1234
Output for 8.3.0 - 8.3.6
Warning: Undefined variable $matches in /in/ndu4Y on line 3 Warning: Trying to access array offset on null in /in/ndu4Y on line 3
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Warning: Undefined variable $matches in /in/ndu4Y on line 3 Warning: Trying to access array offset on value of type null in /in/ndu4Y on line 3
Output for 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Notice: Undefined variable: matches in /in/ndu4Y on line 3 Notice: Trying to access array offset on value of type null in /in/ndu4Y on line 3
Output for 7.3.32 - 7.3.33, 7.4.26
Output for 5.0.4 - 5.0.5, 5.1.1 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31
Notice: Undefined variable: matches in /in/ndu4Y on line 3
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/ndu4Y on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
Notice: Undefined variable: matches in /in/ndu4Y on line 3

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