@@ -833,7 +833,7 @@ protected function peek($regex, &$out, $from = null)
833833 }
834834
835835 $ r = '/ ' . $ regex . '/ ' . $ this ->patternModifiers ;
836- $ result = preg_match ($ r , $ this ->buffer , $ out , null , $ from );
836+ $ result = preg_match ($ r , $ this ->buffer , $ out , 0 , $ from );
837837
838838 return $ result ;
839839 }
@@ -902,7 +902,7 @@ protected function match($regex, &$out, $eatWhitespace = null)
902902 {
903903 $ r = '/ ' . $ regex . '/ ' . $ this ->patternModifiers ;
904904
905- if (! preg_match ($ r , $ this ->buffer , $ out , null , $ this ->count )) {
905+ if (! preg_match ($ r , $ this ->buffer , $ out , 0 , $ this ->count )) {
906906 return false ;
907907 }
908908
@@ -983,7 +983,7 @@ protected function whitespace()
983983 {
984984 $ gotWhite = false ;
985985
986- while (preg_match (static ::$ whitePattern , $ this ->buffer , $ m , null , $ this ->count )) {
986+ while (preg_match (static ::$ whitePattern , $ this ->buffer , $ m , 0 , $ this ->count )) {
987987 if (isset ($ m [1 ]) && empty ($ this ->commentsSeen [$ this ->count ])) {
988988 // comment that are kept in the output CSS
989989 $ comment = [];
@@ -2219,7 +2219,7 @@ protected function propertyName(&$out)
22192219 static ::$ whitePattern ,
22202220 $ this ->buffer ,
22212221 $ m ,
2222- null ,
2222+ 0 ,
22232223 $ this ->count
22242224 )) {
22252225 if (! empty ($ m [0 ])) {
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