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run code in 300+ PHP versions simultaneously
<?php var_dump(preg_match('~office\.react\.com~', 'office.react.com')); var_dump(preg_match('~office\.react\.com~A', 'office.react.com.random.org')); var_dump(preg_match('~office\.react\.com~A', 'www.office.react.com')); var_dump(preg_match('~office\.react\.com~A', 'www.office.react.com.random.org')); var_dump(preg_match('~office\.react\.com~A', "office.react.com\nWaa?")); var_dump(preg_match('~office\.react\.com~AD', "office.react.com\nWaa?"));
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, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
int(1) int(1) int(0) int(0) int(1) int(1)

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