What's the right pattern for this hidden input - php

Question

I have this field Returned by curl_exec:
<input name="NUMBER_R" type="hidden" value="1500000">
150000 is a random number and may change the others are constant
i tried:
preg_match ('/<input name="NUMBER_R" type="hidden" value="([^"]*)" \/>/', $result, $number)
and also:
preg_match ('/<input name=\'NUMBER_R\' type=\'hidden\' value=\'(\\d+)\'>/ims', $result, $number)
but no luck...
Here is the full code:
$result=curl_exec($cid);
curl_close($cid);
$number = array();
if (preg_match ('REGEX', $result, $number))
{
echo $number[1];
}
EDIT 1:
Sorry i forgot [1] in echo $number[1];
Also 1500000 is a random number and may change

Answer 1

Description
This regex will find the input tag which has the attributes name="number_r" and type="hidden" in any order. Then it'll pull out the attribute value with it's associated values. It does require the value text to be all digits
<input\b\s+(?=[^>]*name=(["'])number_r\1)(?=[^>]*type=(["'])hidden\2)[^>]*value=(["'])(\d+)\3[^>]*>
<input\b\s+ consume the open bracket and the tag name, ensure there is a word break and white space
(?=[^>]*name=(["'])number_r\1) look ahead to ensure this tag include the correct name attribute
(?=[^>]*type=(["'])hidden\2) look ahead to ensure this tag also includes the type attribute
[^>]* move the cursor forward until we find the
value= tag
(["']) capture the open qoute
(\d+) capture the substring and require it to be all digits
\3 match the correct close quote. This is can be omitted as you've already received the desired substring.
[^>]*> match the rest of the characters in the tag. This is can be omitted as you've already received the desired substring.
Groups
Group 0 gets the entire input tag
the open quote for name which is back referenced to ensure the correct close quote is captured
the open quote for type which is back referenced to ensure the correct close quote is captured
the open quote for value which is back referenced to ensure the correct close quote is captured
the value in the attribute named value
PHP Code Example:
<?php
$sourcestring="<input name="NUMBER_R" type="hidden" value="1500000">";
preg_match('/<input\b\s+(?=[^>]*name=(["\'])number_r\1)(?=[^>]*type=(["\'])hidden\2)[^>]*value=(["\'])(\d+)\3[^>]*>/im',$sourcestring,$matches);
echo "<pre>".print_r($matches,true);
?>
$matches Array:
(
[0] => <input name="NUMBER_R" type="hidden" value="1500000">
[1] => "
[2] => "
[3] => "
[4] => 1500000
)

Answer 2

Try using DOM and Xpath for get that.
$xml = new DomDocument;
$xml->loadXml('<input name="NUMBER_R" type="hidden" value="1500000" />');
$xpath = new DomXpath($xml);
// traverse all results
foreach ($xpath->query('//input[#name="NUMBER_R"]') as $rowNode) {
var_dump($rowNode->getAttribute('value'));
}
testet : http://codepad.viper-7.com/8dwu9f