[PHP] DOM - change a tag name ??
If I'm manipulating a dom object, is there a way to change the tag name? I know you manipulate just about everything else in a node - but is the tagName really off limits? from the documentation for DOMElement - /* Properties */ readonly public bool $schemaTypeInfo ; readonly public string $tagName ; so if I really needed to change it, I'd have to create a virgin node with the new name, identical attributes and children, and replace the existing node with the new one? Is there any other way to alter the tagName without doing all that? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] DOM - change a tag name ??
Michael A. Peters wrote:
If I'm manipulating a dom object, is there a way to change the tag name?
I know you manipulate just about everything else in a node - but is the
tagName really off limits?
from the documentation for DOMElement -
/* Properties */
readonly public bool $schemaTypeInfo ;
readonly public string $tagName ;
so if I really needed to change it, I'd have to create a virgin node
with the new name, identical attributes and children, and replace the
existing node with the new one?
Is there any other way to alter the tagName without doing all that?
I've not actually tried this (IE may be errors) - I will in a little
bit, but is something like this really the only way to change a tag name?
function changeNodeElement($document,$node,$elementTag) {
$newNode = $document-createElement($elementTag);
// get all attributes from old node
$attributes = $node-attributes;
foreach ($attributes as $attribute) {
$name = $attribute-name;
$value = $attribute-value;
$newNode-setAttribute($name,$value);
}
// get all children from old node
$children = $node-childNodes();
foreach ($children as $child) {
// clone node and add it to newNode
$newChild = $child-cloneNode(true);
$newNode-appendChild($newChild);
}
// replace the old node with the newNode
$node-parent-replaceChild($newNode,$node);
}
It seems that changing the tag name should be a little easier. I don't
expect s/oldtag/newtag/ but am I just missing something obvious?
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] DOM - change a tag name ??
Unfortunately, you are correct. This is the only way to do it at the moment.
tagName/nodeName are readonly in the DOM and are set when created. I know
this is possible in the .NET world and I am still beside myself as to which
is the better way.
-Original Message-
From: Michael A. Peters [mailto:mpet...@mac.com]
Sent: Wednesday, March 11, 2009 1:40 PM
To: php-general@lists.php.net
Subject: Re: [PHP] DOM - change a tag name ??
Michael A. Peters wrote:
If I'm manipulating a dom object, is there a way to change the tag name?
I know you manipulate just about everything else in a node - but is the
tagName really off limits?
from the documentation for DOMElement -
/* Properties */
readonly public bool $schemaTypeInfo ;
readonly public string $tagName ;
so if I really needed to change it, I'd have to create a virgin node
with the new name, identical attributes and children, and replace the
existing node with the new one?
Is there any other way to alter the tagName without doing all that?
I've not actually tried this (IE may be errors) - I will in a little
bit, but is something like this really the only way to change a tag name?
function changeNodeElement($document,$node,$elementTag) {
$newNode = $document-createElement($elementTag);
// get all attributes from old node
$attributes = $node-attributes;
foreach ($attributes as $attribute) {
$name = $attribute-name;
$value = $attribute-value;
$newNode-setAttribute($name,$value);
}
// get all children from old node
$children = $node-childNodes();
foreach ($children as $child) {
// clone node and add it to newNode
$newChild = $child-cloneNode(true);
$newNode-appendChild($newChild);
}
// replace the old node with the newNode
$node-parent-replaceChild($newNode,$node);
}
It seems that changing the tag name should be a little easier. I don't
expect s/oldtag/newtag/ but am I just missing something obvious?
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
__ Information from ESET Smart Security, version of virus signature
database 3927 (20090311) __
The message was checked by ESET Smart Security.
http://www.eset.com
__ Information from ESET Smart Security, version of virus signature
database 3927 (20090311) __
The message was checked by ESET Smart Security.
http://www.eset.com
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] DOM - change a tag name ??
On Wed, Mar 11, 2009 at 11:52 AM, Michael A. Peters mpet...@mac.com wrote: If I'm manipulating a dom object, is there a way to change the tag name? I know you manipulate just about everything else in a node - but is the tagName really off limits? from the documentation for DOMElement - /* Properties */ readonly public bool $schemaTypeInfo ; readonly public string $tagName ; so if I really needed to change it, I'd have to create a virgin node with the new name, identical attributes and children, and replace the existing node with the new one? Is there any other way to alter the tagName without doing all that? If this is related to your earlier post about attributes, is XSLT not an option? I hate to sound like a broken record, but PHP has support for XSL transformations and it sounds like that is exactly what you are trying to do. Andrew -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] DOM - change a tag name ??
Andrew Ballard wrote: On Wed, Mar 11, 2009 at 11:52 AM, Michael A. Peters mpet...@mac.com wrote: If I'm manipulating a dom object, is there a way to change the tag name? I know you manipulate just about everything else in a node - but is the tagName really off limits? from the documentation for DOMElement - /* Properties */ readonly public bool $schemaTypeInfo ; readonly public string $tagName ; so if I really needed to change it, I'd have to create a virgin node with the new name, identical attributes and children, and replace the existing node with the new one? Is there any other way to alter the tagName without doing all that? If this is related to your earlier post about attributes, is XSLT not an option? I hate to sound like a broken record, but PHP has support for XSL transformations and it sounds like that is exactly what you are trying to do. Andrew No. XSLT is certainly one of the technologies I'm going to look into, but right now I'm building a filter that (hopefully) will fully implement the Mozilla developer Content Security Policy server side before the document gets sent to the browser - by removing what would violate the specified CSP before it is sent. My primary interest in changing tag names is to ensure all tags are lower case so I can then run the rest of the filter. They are all lower case if you use loadHTML() but I don't want my class to assume it has a properly created DOMDocument to start with, so I want to walk the DOM and change bad tags/attribute names before I apply the CSP filtering. That might be something where XSLT is better but I believe I need to install some libraries and recompile php before I can use XSLT as it appears my current build doesn't support it (according to phpinfo()) so playing with XSLT is for another day. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] DOM - change a tag name ??
On Wed, Mar 11, 2009 at 3:06 PM, Michael A. Peters mpet...@mac.com wrote: Andrew Ballard wrote: On Wed, Mar 11, 2009 at 11:52 AM, Michael A. Peters mpet...@mac.com wrote: If I'm manipulating a dom object, is there a way to change the tag name? I know you manipulate just about everything else in a node - but is the tagName really off limits? from the documentation for DOMElement - /* Properties */ readonly public bool $schemaTypeInfo ; readonly public string $tagName ; so if I really needed to change it, I'd have to create a virgin node with the new name, identical attributes and children, and replace the existing node with the new one? Is there any other way to alter the tagName without doing all that? If this is related to your earlier post about attributes, is XSLT not an option? I hate to sound like a broken record, but PHP has support for XSL transformations and it sounds like that is exactly what you are trying to do. Andrew No. XSLT is certainly one of the technologies I'm going to look into, but right now I'm building a filter that (hopefully) will fully implement the Mozilla developer Content Security Policy server side before the document gets sent to the browser - by removing what would violate the specified CSP before it is sent. My primary interest in changing tag names is to ensure all tags are lower case so I can then run the rest of the filter. They are all lower case if you use loadHTML() but I don't want my class to assume it has a properly created DOMDocument to start with, so I want to walk the DOM and change bad tags/attribute names before I apply the CSP filtering. How are you traversing the DOM if it is not already properly formed? Every time I've ever tried to load a DOMDocument with xml that wouldn't validate, it blew up and the DOMDocument was left empty. I usually find loadHTML() to be more forgiving. That might be something where XSLT is better but I believe I need to install some libraries and recompile php before I can use XSLT as it appears my current build doesn't support it (according to phpinfo()) so playing with XSLT is for another day. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] DOM - change a tag name ??
Andrew Ballard wrote: On Wed, Mar 11, 2009 at 3:06 PM, Michael A. Peters mpet...@mac.com wrote: Andrew Ballard wrote: On Wed, Mar 11, 2009 at 11:52 AM, Michael A. Peters mpet...@mac.com wrote: If I'm manipulating a dom object, is there a way to change the tag name? I know you manipulate just about everything else in a node - but is the tagName really off limits? from the documentation for DOMElement - /* Properties */ readonly public bool $schemaTypeInfo ; readonly public string $tagName ; so if I really needed to change it, I'd have to create a virgin node with the new name, identical attributes and children, and replace the existing node with the new one? Is there any other way to alter the tagName without doing all that? If this is related to your earlier post about attributes, is XSLT not an option? I hate to sound like a broken record, but PHP has support for XSL transformations and it sounds like that is exactly what you are trying to do. Andrew No. XSLT is certainly one of the technologies I'm going to look into, but right now I'm building a filter that (hopefully) will fully implement the Mozilla developer Content Security Policy server side before the document gets sent to the browser - by removing what would violate the specified CSP before it is sent. My primary interest in changing tag names is to ensure all tags are lower case so I can then run the rest of the filter. They are all lower case if you use loadHTML() but I don't want my class to assume it has a properly created DOMDocument to start with, so I want to walk the DOM and change bad tags/attribute names before I apply the CSP filtering. How are you traversing the DOM if it is not already properly formed? Every time I've ever tried to load a DOMDocument with xml that wouldn't validate, it blew up and the DOMDocument was left empty. I usually find loadHTML() to be more forgiving. The problem isn't with xml that doesn't validate, the problem is that HTML is not case sensitive. script/script and scRIpT/scRIpT are both legal xml but are different tags to xml. In xhtml the first is a script element, the second has no meaning and is discarded by the browser. However when sending the document as html (necessary for IE users, for example) - html is not case sensitive, the second is valid script tag. So if the content security policy says no scripts are allowed on the page, I need to catch both the second and the first. I was actually doing it with regex by saving the document to a buffer first but to avoid altering content, I had to make sure I was operating inside tags etc. and then it dawned on me - it's structured data, use a tool designed to work with structured data. If the class was just for me it wouldn't matter, but if I put the class out in the wild - $doc-createElement(SCriPt); is legal and even can be used to produce legal validating HTML 4.01 upon saveHTML() but it would dodge how my class locates and checks for script elements. There doesn't seem to be a case insensitive way to find tags/elements in the php xml tools, so before my class does the filtering it needs to first make sure the tags/attributes are all lower case. How the potential users (if there ever are any) of my class get their page into DOMDocument is up to them, not me. They can loadHTML() or create it from scratch or import it from some other xml format. If their source is an html file (or buffer), I will recommend they run it through tidy first - tidy does wonders - but it's still up to them, not me, so my class can't assume the tags are lower case. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
