<?php // UNIT_MARKER_INVALID_CHARS = '_/\n<>'; echo $ic = preg_quote( '_/\n<>', '~'); var_dump( preg_match( "~[$ic]~", 'this-contains-letter-n' ) ); var_dump( preg_match( "~[$ic]~", 'this-comtaims-letter-m' ) ); var_dump( preg_match( "~[$ic]~", 'aaa' ) );
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