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run code in 150+ php & hhvm versions
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<?php $string = '  love@outerbanks.org  '; preg_match('/^\x{c2a0}*(.*)\x{c2a0}*$/u', $string, $out); var_dump($out);
based on Qpn2W
Output for 4.3.3 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(2) { [0]=> string(27) "  love@outerbanks.org  " [1]=> string(27) "  love@outerbanks.org  " }
Output for 4.3.0 - 4.3.2
array(0) { }