如何在忽略分隔符大小写的情况下分解字符串？

Question

我有以下代码：

$string = "zero Or one OR two or three";
print_r(explode("or", $string));

现在这导致：

Array ( [0] => zero Or one OR two [1] => three )

但我想忽略定界符的大小写，因此它适用于 Or、OR，...我的结果是：

Array ( [0] => zero [1] => one [2] => two [3] => three )

我该怎么做？

Answer 1

$string = "zero Or one OR two or three";
$keywords = preg_split("/or/i", $string);
echo '<pre>';print_r($keywords);echo '</pre>';

输出：

Array
(
    [0] => zero 
    [1] =>  one 
    [2] =>  two 
    [3] =>  three
)

How to explode a string ignoring the case of the delimiter?