How to find a particular value from a string

Question

I have a string (not xml )

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

from this, i need to get the value 15772348, that is the value of headervalue. How is possible?

You say you do not have xml, but what you present is definitely some kind of XML structured code. So if you have a XML structured document you should use the relying parser. — Julius F, Sep 03 '10 at 14:34
Could it be, that you have a HTTP Header, and show it as XML to us, but you actually talk about a HTTP Header? — Julius F, Sep 03 '10 at 15:30

shamittomar · Accepted Answer · 2010-09-03T18:57:10.183

10

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.

edited Sep 03 '10 at 18:57

answered Sep 03 '10 at 14:29

shamittomar

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it output the answer, but also getting some warning Warning: DOMDocument::loadHTML() [function.DOMDocument-loadHTML]: Tag headername invalid in Entity, line: 1 in C:\wamp\www\test.php on line 496 Warning: DOMDocument::loadHTML() [function.DOMDocument-loadHTML]: Tag headervalue invalid in Entity, line: 1 in C:\wamp\www\test.php on line 496 Warning: DOMDocument::loadHTML() [function.DOMDocument-loadHTML]: Unexpected end tag : header in Entity, line: 1 in C:\wamp\www\test.php on line 496 – Linto P D Sep 03 '10 at 14:41
@Linto, I have updated the code to suppress the warning. Try new code now. – shamittomar Sep 03 '10 at 14:44
It will fail to load as XML because there is no root element. – BoltClock Sep 03 '10 at 18:59
@Boltclock: yes, that's why I made it clear by editing the edit :) – shamittomar Sep 03 '10 at 19:01

Michael Mior · Answer 2 · 2010-09-03T17:27:59.850

2

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);
?>

edited Sep 03 '10 at 17:27

answered Sep 03 '10 at 14:32

Michael Mior

28,107
9
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3

It's ok for simple things like this, but obligatory warning about using regular expressions to parse non-regular languages. [That way lies madness](http://stackoverflow.com/questions/1732348/1732454#1732454). – James Sep 03 '10 at 14:42

score 1 · Answer 3 · answered Jun 19 '14 at 13:32

// 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)

score 1 · Answer 4 · answered Jun 20 '14 at 11:57

       <?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

How to find a particular value from a string

4 Answers4