I've got an element by name attribute in Php using a DOMDocument (I do not want to use id) but how can I then set it's textContent and save to the dom object?
So far I have the following code:
$dom = new DOMDocument();
$dom->loadHTML($html);
foreach($dom->getElementsByTagName('*') as $element ){
$element_name = $element->getAttribute("name");
if($element_name == 'mytextareaname') {
$element->textContent = "Some text content";
}
}
$html_with_values = $dom->saveHTML();
But the values are not saved, because I probably need to reference the $dom object when saving rather than $element. How can I do that, can I add a key to the foreach and use that?
Setting the dom element's textContent for a textarea did not work, but setting it's nodeValue set both nodeValue and textContent.
Related
I'm trying to figure out how parse an html page to get a forms action value, the labels within the form tab as well as the input field names. I took at look at php.net Domdocument and it tells me to get a childnode but all that does is give me errors that it doesnt exist. I also tried doing print_r of the variable holding the html content and all that shows me is length=1. Can someone show me a few samples that i can use because php.net is confusing to follow.
<?php
$content = "some-html-source";
$content = preg_replace("/&(?!(?:apos|quot|[gl]t|amp);|#)/", '&', $content);
$dom = new DOMDocument;
$dom->preserveWhiteSpace = FALSE;
$dom->loadHTML($content);
$form = $dom->getElementsByTagName('form');
print_r($form);
I suggest using DomXPath instead of getElementsByTagName because it allows you to select attribute values directly and returns a DOMNodeList object just like getElementsByTagName. The # in #action indicates that we're selecting by attribute.
$doc = new DOMDocument();
$doc->loadHTML($content);
$xpath = new DomXPath($doc);
$action = $xpath->query('//form/#action')->item(0);
var_dump($action);
Similarly, to get the first input
$action = $xpath->query('//form/input')->item(0);
To get all input fields
for($i=0;$i<$xpath->query('//form/input')->length;$i++) {
$label = $xpath->query('//form/input')->item($i);
var_dump($label);
}
If you're not familiar with XPath, I recommend viewing these examples.
innerHTML in php DomDocument does not work in simple PHP script and I can't set the inner html of html element by id, There is no error/warning! what should I do ?
(I also checked the file name and the html element id)
$index = new DomDocument;
$index->validateOnParse = true;
$index->formatOutput = true;
$index->loadHTML('index.php');
$index->getElementById('element-unique-id')->innerHTML = 'some text';
echo $index->saveHTML();
the out put is blank.
As there's no inneHTML-property, you can solve it by creating and appending a new DOMText node:
$index->getElementById('element-unique-id')
->appendChild(new DOMText('some text'));
See also The DOMText class and DOMText::__construct.
Say I have an html file that I have loaded, I run this query:
$url = 'http://www.fangraphs.com/players.aspx';
$html = file_get_contents($url);
$myDom = new DOMDocument;
$myDom->formatOutput = true;
#$myDom->loadHTML($html);
$anchor = $xpath->query('//a[contains(#href,"letter")]');
That gives me a list of these anchors that look like the following:
Aa
But I need a way to only get "players.aspx?letter=Aa".
I thought I could try:
$anchor = $xpath->query('//a[contains(#href,"letter")]/#href');
But that gives me a php error saying I couldn't append node when I try the following:
$xpath = new DOMXPath($myDom);
$newDom = new DOMDocument;
$j = 0;
while( $myAnchor = $anchor->item($j++) ){
$node = $newDom->importNode( $myAnchor, true ); // import node
$newDom->appendChild($node);
}
Any idea how to obtain just the value of the href tags that the first query selects?? Thanks!
Use:
//a/#href[contains(., 'letter')]
this selects any href attribute of any a whose string value (of the attribute) contains the string "letter" .
Your XPath query is returning attributes themselves (i.e., DOMAttr objects) rather than elements (i.e., DOMElement objects). That's fine, and that seems to be what you want, but appending them to the document is the problem. A DOMAttr is not a standalone node in the document tree; it's associated with a DOMElement but is not a child in the usual sense. Thus, directly appending a DOMAttr to the document is invalid.
From the W3C specs:
Attr objects inherit the Node interface, but since they are not actually child nodes of the element they describe, the DOM does not consider them part of the document tree. . . . The DOM takes the view that attributes are properties of elements rather than having a separate identity from the elements they are associated with
Either associate the DOMAttr with a DOMElement and append that element, or pull out the DOMAttr's value and use that as you wish.
To just append its plain text value, use its value in a DOMText node and append that. For example, change this line:
$newDom->appendChild($node);
to this:
$newDom->appendChild(new DOMText($node->value));
try this..
$xml_string = 'your xml string';
$xml = simplexml_load_string($xml_string);
foreach($xml->a[0]->attributes() as $href => $value) {
$myAnchorsValues[] = $value;
}
var_dump($myAnchorsValues);
I'm using PHP/Zend to load html into a DOM, and then I get a specific div id that I want to modify.
$dom = new Zend_Dom_Query($html);
$element = $dom->query('div[id="someid"]');
How do I modify the text/content/html displayed inside that $element div, and then save the changes to the $dom or $html so I can print the modified html. Any idea how to do this?
Zend_Dom_Query is tailored just for querying a dom, so it doesn't provide an interface in and of itself to alter the dom and save it, but it does expose the PHP Native DOM objects that will let you do so. Something like this should work:
$dom = new Zend_Dom_Query($html);
$document = $dom->getDocument();
$elements = $dom->query('div[id="someid"]');
foreach($elements AS $element) {
//$element is an instance of DOMElement (http://www.php.net/DOMElement)
//You have to create new nodes off the document
$node = $document->createElement("div", "contents of div");
$element->appendChild($node)
}
$newHtml = $document->saveXml();
Take a look at the PHP Doc for DOMElement to get an idea of how you can alter the dom:
http://www.php.net/DOMElement
Is there a way to remove a HTML element by using the DOMDocument class?
In addition to Dave Morgan's answer you can use DOMNode::removeChild to remove child from list of children:
Removing a child by tag name
//The following example will delete the table element of an HTML content.
$dom = new DOMDocument();
//avoid the whitespace after removing the node
$dom->preserveWhiteSpace = false;
//parse html dom elements
$dom->loadHTML($html_contents);
//get the table from dom
if($table = $dom->getElementsByTagName('table')->item(0)) {
//remove the node by telling the parent node to remove the child
$table->parentNode->removeChild($table);
//save the new document
echo $dom->saveHTML();
}
Removing a child by class name
//same beginning
$dom = new DOMDocument();
$dom->preserveWhiteSpace = false;
$dom->loadHTML($html_contents);
//use DomXPath to find the table element with your class name
$xpath = new DomXPath($dom);
$classname='MyTableName';
$xpath_results = $xpath->query("//table[contains(#class, '$classname')]");
//get the first table from XPath results
if($table = $xpath_results->item(0)){
//remove the node the same way
$table ->parentNode->removeChild($table);
echo $dom->saveHTML();
}
Resources
http://us2.php.net/manual/en/domnode.removechild.php
How to delete element with DOMDocument?
How to get full HTML from DOMXPath::query() method?
http://us2.php.net/manual/en/domnode.removechild.php
DomDocument is a DomNode.. You can just call remove child and you should be fine.
EDIT: Just noticed you were probably talking about the page you are working with currently. Don't know if DomDocument would work. You may wanna look to use javascript at that point (if its already been served up to the client)