正則表達式查找大寫和小寫和任何派生詞

Question

我想在我的字符串中刪除word：

Word , WOrd , WORd , wORd , word , WoRd 

我研究這件事，但不能找到一種方法來實現這一目標。我如何爲此寫出正則表達式？

Answer 1

使用/i修飾符來忽略大小寫。

$input = preg_replace("/word/i", "", $input); 

Answer 2

請看下面的例子從PHP manual

<?php 
// The "i" after the pattern delimiter indicates a case-insensitive search 
if (preg_match("/php/i", "PHP is the web scripting language of choice.")) { 
    echo "A match was found."; 
} else { 
    echo "A match was not found."; 
} 
?> 

Answer 3

可能不是你想要什麼，但在這裏不用...

$words = "Word , WOrd , WORd , wORd , word , WoRd"; 
$wordArray = explode(",", $words); 

foreach($wordArray as $key=>$word){ 
    if($word==strtolower($word)){ 
     unset($wordArray[$key]); 
    } 
}