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run code in 150+ php & hhvm versions
Bugs & Features
<?php $result = "°Freen\x18ew°\x90ɮ\xa0"; //$result = trim($result,"\xc2"/*"\xa0"*/); //echo preg_replace('#[\x00-\x1F\x7F-\x9F]#S', '', $result); //echo preg_replace('~[\x{0000}-\x{001F}\x{007F}-\x{00a0}]~', '', $result); echo preg_replace('~[\x{007F}-\x{00a0}]~', '', $result); /* //reject overly long 2 byte sequences, as well as characters above U+10000 and replace with ? $result= preg_replace('/[\x00-\x08\x10\x0B\x0C\x0E-\x19\x7F]'. '|[\x00-\x7F][\x80-\xBF]+'. '|([\xC0\xC1]|[\xF0-\xFF])[\x80-\xBF]*'. '|[\xC2-\xDF]((?![\x80-\xBF])|[\x80-\xBF]{2,})'. '|[\xE0-\xEF](([\x80-\xBF](?![\x80-\xBF]))|(?![\x80-\xBF]{2})|[\x80-\xBF]{3,})/S', '', $result ); echo $result; */
Output for 4.4.3 - 4.4.9, 5.1.3 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
°Freenew°ɮ
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.11 - 4.4.2, 5.0.0 - 5.1.2
Warning: preg_replace(): Compilation failed: range out of order in character class at offset 11 in /in/iXnMd on line 10
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: range out of order in character class at offset 11 in /in/iXnMd on line 10