如何在 PHP 中获取两个字符串之间的子字符串

发布于03月23日

I need a function that returns the substring between two words (or two characters). I'm wondering whether there is a php function that achieves that. I do not want to think about regex (well, I could do one but really don't think it's the best way to go). Thinking of strpos and substr functions. Here's an example:

$string = "foo I wanna a cake foo";

We call the function: $substring = getInnerSubstring($string,"foo");
It returns: " I wanna a cake ".

Update:

$string =" foo I like php foo, but foo I also like asp foo, foo I feel hero  foo";

我得到一个像{"I like php", "I also like asp", "I feel hero"}的array.

推荐答案

如果字符串不同(即:[foo]&；[/foo])，请看贾斯汀·库克(Justin Cook)的this post. 我将他的代码复制到下面:

function get_string_between($string, $start, $end){
    $string = ' ' . $string;
    $ini = strpos($string, $start);
    if ($ini == 0) return '';
    $ini += strlen($start);
    $len = strpos($string, $end, $ini) - $ini;
    return substr($string, $ini, $len);
}

$fullstring = 'this is my [tag]dog[/tag]';
$parsed = get_string_between($fullstring, '[tag]', '[/tag]');

echo $parsed; // (result = dog)