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<?php $str = "ʪ֣ãÅìÐÄš³·¿­ÉÁÊ¡¸Ší¿ÃÐÁ®›¶œ¸˜Ï¹¥ç"; $esc = preg_replace( '~([^a-z0-9])~u','\\\$1',$str ); var_dump( $esc );
Output for git.master, git.master_jit, rfc.property-hooks
string(106) "\Ê\ª\Ö\£\ã\Å\ì\Ð\Ä\š\³\·\¿\­\É\Á\Ê\¡\¸\Š\í\¿\Ã\Ð\Á\®\›\¶\œ\¸\˜\Ï\¹\¥\ç"

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