回答編集履歴
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調整
answer
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@@ -1,6 +1,6 @@
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1
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```PHP
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$a=["ab","a b","ab ","a b"," "," "," "];
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-
$pattern="/[^\x20\xE3\x80\x80]+/";
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$pattern="/[^\x20\xE3\x80\x80]+/u";
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foreach($a as $str){
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if(preg_match($pattern,$str)){
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print "[".$str."]<br>";
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