我在字符串中找到关键字“paintball”，并将其包裹在span标签中以将其颜色更改为红色...$newoutput=str_replace("Paintball","Paintball",$output);echo$newoutput;这行得通，但人们在现场将其写为“Paintball”、“paintball”、“PaintBall”、“paintball”等。有没有更好的方法来做到这一点而不是对每个单词重复它？理想情况下类似...$words="Paintball","paintball","PaintBall","paintball";$newoutput=str_replac