How to find a particular value from a string

I have a string (not xml )

<headername>X-Mailer-Recptid</headername>
<headervalue>15772348</headervalue>
</header>

from th开发者_如何学JAVAis, i need to get the value 15772348, that is the value of headervalue. How is possible?

---

Use PHP DOM and traverse the headervalue tag using getElementsByTagName():

<?php
$doc = new DOMDocument;
@$doc->loadHTML('<headername>X-Mailer-Recptid</headername><headervalue>15772348</headervalue></header>');

$items = $doc->getElementsByTagName('headervalue');

for ($i = 0; $i < $items->length; $i++) {
    echo $items->item($i)->nodeValue . "\n";
}
?>

This gives the following output:

15772348

[EDIT]: Code updated to suppress non-HTML warning about invalid headername and headervalue tags as they are not really HTML tags. Also, if you try to load it as XML, it totally fails to load.

---

This looks XML-like to me. Anyway, if you don't want to parse the string as XML (which might be a good idea), you could try something like this:

<?
$str = "<headervalue>15772348</headervalue>";
preg_match("/<headervalue\>([0-9]+)<\/headervalue>/", $str, $matches);
print_r($matches);
?>

---

// find string short way

function my_url_search($se_action_data)
    {
        // $regex = '/https?\:\/\/[^\" ]+/i';
           $regex="/<headervalue\>([0-9]+)<\/headervalue>/"
         preg_match_all($regex, $se_action_data, $matches);
         $get_url=array_reverse($matches[0]);
         return array_unique($get_url);
    }
echo my_url_search($se_action_data)

---

       <?php
      $html = new simple_html_dom();
        $html = str_get_html("<headername>X-Mailer-Recptid</headername>headervalue>15772348</headervalue></header>");        // Use Html dom here 
        $get_value=$html->find("headervalue", 0)->plaintext;
        echo $get_value;

    ?>



  http://simplehtmldom.sourceforge.net/manual.htm#section_find