如何在php上使用preg_match_all在两种模式之间选择内容？

Question

Im trying to search for two HTML tags, and also grab everything in between. When I try each of the tags separately it finds them fine, so I know that they are spelled right and exist. The problem I think is with the pattern, can someone please help me with it. Everything I research online seems to go right over my head. So if you could please explain how your pattern works, that would be awesome!

See code below, and if you have any questions feel free to ask.

Thanks for your time:)

<?php
$date= date(Y)."/".date(n)."/".date(j);
$address= "http:www.example.com/".$date;
$text_page = file_get_contents("$address");

$searchfor1 = '<li id="menuSynchronizeSwitch">';
$searchfor2 = '<li  id="footerPrevWeek';

header('Content-Type: text/plain');

$pattern1 = preg_quote($searchfor1, '/');
$pattern2 = preg_quote($searchfor2, '/');

$pattern = "/^.*$pattern1.*\r*$pattern2.*\$/m";


if(preg_match_all($pattern, $text_page, $matches)){
   echo "Found matches:\n";
   echo implode("\n", $matches[0]);
}
else{
   echo "No matches found";
}
?>

Answer 1

尝试使用$pattern = '/\\<li id\\="menuSynchronizeSwitch"\\>.*\\<li id\\="footerPrevWeek/si';请注意/s ，它允许点匹配换行符，我怀疑是是什么导致此操作失败。

Answer 2

You'll need to group each pattern with parenthesis

like this:

$pattern = "/(some pattern)/";

and you can get each group by going through the $matches array