CODEWITHSUNDEEP
phpregexhtml-parsing
Jorge Zuverza
Jorge Zuverza

Reputation: 915

Get the value of a html input element as a php string

I have a html file loaded as a string in php, and I need to get the values of the input elements in the HTML string. Can someone help me build a function which takes the name of the input element and returns its value?

This is an example of the function I would like to do:

function getVal($name){

    $htmlStr = "<form action = \"action.php\"><input type=\"hidden\" name=\"command\" value=\"123456\">
                <input type=\"hidden\" name=\"quantity\" value=\"1\">
                <input type=\"hidden\" name=\"user_mode\" value=\"1\">
                <input type=\"hidden\" name=\"stock\" value=\"-1255303070\">
                <input type=\"hidden\" name=\"id\" value="429762082">
                <input type=\"hidden\" name=\"pidm\" value=\"2\"></form>";

            // I'd like to get the value of $name here probably using preg_match     

            return $value; //returns 123456

        }

$val = getVal("command"); //val should be 123456.

any idas? Thank you

Upvotes: 2

Views: 6975

Answers (2)

netcoder
netcoder

Reputation: 67735

Load the HTML in a DOMDocument, then a simple XPath query would to the trick:

$xpath = new DOMXPath($domDocument);
$items = $xpath->query('//*[@name="command"]/@value');
if ($items->length)
    $value = $items->item(0)->value;

Upvotes: 1

ioseb
ioseb

Reputation: 16951

Here is an example with DOM:

$html = "<form action = \"action.php\">
  <input type=\"hidden\" name=\"command\" value=\"123456\">
  <input type=\"hidden\" name=\"quantity\" value=\"1\">
  <input type=\"hidden\" name=\"user_mode\" value=\"1\">
  <input type=\"hidden\" name=\"stock\" value=\"-1255303070\">
  <input type=\"hidden\" name=\"id\" value=\"429762082\">
  <input type=\"hidden\" name=\"pidm\" value=\"2\">
</form>";

$document = new DOMDocument();
$document->loadHTML($html);

$inputs = $document->getElementsByTagName("input");

foreach ($inputs as $input) {
  if ($input->getAttribute("name") == "id") {
    $value = $input->getAttribute("value");
  }
}

echo $value;

Upvotes: 8

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