在php中搜索不区分大小写的xpath

$search_str = 'apple';
$replace_str = 'orange';
$subject = 'The quick brown fox jumps over the lazy dog';

$result = str_ireplace($search_str, $replace_str, $subject);

echo $result; // 输出 "The quick brown fox jumps over the lazy dog"

$search_str = 'apple';
$replace_str = 'orange';
$subject = array('The quick brown fox jumps over the lazy dog', 'The quick red fox jumps over the lazy dog');

$result = array_map(function($item) use ($search_str, $replace_str) {
    return str_ireplace($search_str, $replace_str, $item);
}, $subject);

print_r($result); // 输出 Array ( [0] => The quick brown fox jumps over the lazy dog [1] => The quick red fox jumps over the lazy dog )