PHP RegEx 删除特定字符之间的字符

Question

I've done some digging around and can't seem to find an exact answer to this question. I've tried online regex testers to no avail. I am trying to remove text from a string between 2 points.

Here is an example of the string:

##- Please type your reply above this line -## Awesome service Message-Id:5HKR22W0_53adb264b3dc5_63f13f80dc4b33f824958ec_sprut - 3 days ago

I would like to trim the string to say only Awesome service .

So, I need to remove the ## and everything in between, as well as Message-ID through sprut .

How can I achieve this?

EDIT: Just to be clear, i am trying to squeeze this into a php expression. This is what i have that is not working:

<?php 

if(preg_match('##(.*?)##\\s*(.+?)\\s*Message-Id:.*$',$tweet['tweet'],$matches)) $tweet['tweet'] = $matches[1];
echo (string) trim($tweet["tweet"]);

?>

Answer 1

You can easily match portion between ## and ## using ##(.*?)## . Also removing everything after message id is trivial: Message-Id:.* . Joined together you have: ~##(.*?)##\\\\s*(.+?)\\\\s*Message-Id:.*$~ and you can easily use one of these:

$regex = '~##(.*?)##\\s*(.+?)\\s*Message-Id:.*$~';

// Use replace
$data = preg_replace( $regex, '$2', $data);

// Or match
$matches = array();
if( preg_match($regex, $data, $matches)){
    $data = $matches[2];
}

Life example here .

Answer 2

preg_match("!## (.+) Message.+ - (.+)!", $your_text, $taken)

访问捕获的单词，如果它们是 'isset' $taken[1] 和 $taken[2]

Answer 3

You can use:

$re = "/##.*?## *| Message-Id:.*$/"; 
$str = "##- Please type your reply above this line -## Awesome service Message-Id:5HKR22W0_53adb264b3dc5_63f13f80dc4b33f824958ec_sprut - 3 days ago"; 

$result = preg_replace($re, '', $str); // Awesome service

Working Demo

Answer 4

You could use a positive lookaheads and lookbehinds to extract the string Awesome Service which was in between ## and Message-ID .

<?php
$mystring = "##- Please type your reply above this line -## Awesome service Message-Id:5HKR22W0_53adb264b3dc5_63f13f80dc4b33f824958ec_sprut - 3 days ago";
$regex = '~.*(?<=##\s)(.*)(?= Message-Id:).*~';
$replacement = "$1";
echo preg_replace($regex, $replacement, $mystring);
?> //=> Awesome service

Working DEMO