很简单：如何用php替换“all between”？

php replace str-replace

2022-08-30 15:29:00

$string = "<tag>i dont know what is here</tag>"
$string = str_replace("???", "<tag></tag>", $string);
echo $string; // <tag></tag>

那么我在寻找什么代码呢？

答案 1

一个通用函数：

function replace_between($str, $needle_start, $needle_end, $replacement) {
    $pos = strpos($str, $needle_start);
    $start = $pos === false ? 0 : $pos + strlen($needle_start);

    $pos = strpos($str, $needle_end, $start);
    $end = $pos === false ? strlen($str) : $pos;

    return substr_replace($str, $replacement, $start, $end - $start);
}

演示

答案 2

$search = "/[^<tag>](.*)[^<\/tag>]/";
$replace = "your new inner text";
$string = "<tag>i dont know what is here</tag>";
echo preg_replace($search,$replace,$string);

输出：