我有一个我要过滤的字符串。 我想找到一些我想用 我的代码：
preg_replace 替换的单词。 我的参数是我想从字符串中取出的一系列单词，而我的替换只是一个空白区域。 有人可以帮我解决这个问题。
$ str =“你好 这是美好的一天。“;
$ para = array（”world“，”day“）;
$ newstr = preg_replace（'/ \ b（$ para）\ b /'，''，$ str ）;
echo $ newstr;
I have a string which I want to filter. I want to find some words which I want to replace using preg_replace. My parameters are an array of words I want to take out from my string, and my replacements is just an empty space. Can someone please help me to solve this problem.
My Code:
$str = "Hello world. It's a beautiful day.";
$para = array("world","day");
$newstr = preg_replace('/\b($para)\b/','',$str);
echo $newstr;
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