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<?php $txt="Неё, неё в этом дело. Но удержать такого запала, правда?"; var_dump(preg_match_all("~(?<![\p{L}\p{Nd}])не(?![\p{L}\p{Nd}])~iu", $txt, $out)); var_dump( $out );
Output for git.master, git.master_jit, rfc.property-hooks
int(0) array(1) { [0]=> array(0) { } }

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