DOMElement::setAttribute

(PHP 5, PHP 7)

DOMElement::setAttribute — Adds new attribute

说明

public DOMAttr DOMElement::setAttribute ( string $name , string $value )

Sets an attribute with name name to the given value. If the attribute does not exist, it will be created.

参数

name: The name of the attribute.
value: The value of the attribute.

返回值

The new DOMAttr or FALSE if an error occurred.

错误／异常

DOM_NO_MODIFICATION_ALLOWED_ERR: Raised if the node is readonly.

范例

Example #1 Setting an attribute

  <?php
$doc  = new  DOMDocument ( "1.0" );
 $node  =  $doc -> createElement ( "para" );
 $newnode  =  $doc -> appendChild ( $node );
 $newnode -> setAttribute ( "align" ,  "left" );
 ?>

参见

DOMElement::hasAttribute() - Checks to see if attribute exists
DOMElement::getAttribute() - Returns value of attribute
DOMElement::removeAttribute() - Removes attribute

用户评论:

[#1] lehal2@hotmail [2013-06-06 09:44:35]

The use of Dom to first remove and then add the width and height to the first img tag from the text.I hope it help you to save your time
<?php
$html = '

<img src="http://www.example.com/images/header.jpg" width="898" height="223" style="border-bottom:5px solid #cccccc;"/>
<img src="http://www.example.com/images/header2.jpg" width="898" height="223" style="border-bottom:5px solid #cccccc;"/>
';

$doc = DOMDocument::loadHTML($html);
$c =0;
foreach($doc->getElementsByTagName('img') as $image){
if ($c>0) continue;
    foreach(array('width', 'height') as $attribute_to_remove){
echo $attribute_to_remove;
        if($image->hasAttribute($attribute_to_remove)){
            $image->removeAttribute($attribute_to_remove);

        }
        if($attribute_to_remove=='height'){
         if(!$image->hasAttribute($attribute_to_remove)){
         $image->setAttribute($attribute_to_remove,'220');

         }}
        if($attribute_to_remove=='width'){
      if(!$image->hasAttribute($attribute_to_remove)){
            $image->setAttribute($attribute_to_remove,'700');

        }}
        $c = $c+1;
    }
}
echo $doc->saveHTML();

[#2] Rakesh Verma - rakeshnsony at gmail dot com [2010-11-10 23:27:51]

<?php //Store your html into $html variable. $html=" <html> <head> <title>Untitled Document</title> </head> <body> <a href='http://example.com'>Example</a><br> <a href='http://google.com'>Google</a><br> <a href='http://www.yahoo.com'>Yahoo</a><br> </body> </html>"; $dom = new DOMDocument(); $dom->loadHTML($html); //Evaluate Anchor tag in HTML $xpath = new DOMXPath($dom); $hrefs = $xpath->evaluate("/html/body//a"); for ($i = 0; $i < $hrefs->length; $i++) { $href = $hrefs->item($i); $url = $href->getAttribute('href'); //remove and set target attribute $href->removeAttribute('target'); $href->setAttribute("target", "_blank"); $newURL=$url."/newurl"; //remove and set href attribute $href->removeAttribute('href'); $href->setAttribute("href", $newURL); } // save html $html=$dom->saveHTML(); echo $html; ?>

[#3] address at gmail dot com [2008-07-03 07:25:11]

If wanting to set an attribute of an element with unique id of "1"

<?php $dom = new DomDocument(); $dom->load('test.xml'); $xp = new DomXPath($dom); $res = $xp->query("/

  readonly public string  $publicId  
    ;
  readonly public string  $systemId  
    ;
  readonly public string  $notationName  
    ;
  public string  $actualEncoding  
    ;
  readonly public string  $encoding  
    ;
  readonly public string  $version  
    ;
 
  public DOMNode  DOMNode::appendChild 
    (   DOMNode  $newnode 
   )
  public string  DOMNode::C14N 
    ([  bool $exclusive 
   [,  bool $with_comments 
   [,  array $xpath 
   [,  array $ns_prefixes 
  ]]]] )
  public int  DOMNode::C14NFile 
    (  string $uri 
   [,  bool $exclusive 
   [,  bool $with_comments 
   [,  array $xpath 
   [,  array $ns_prefixes 
  ]]]] )
  public DOMNode  DOMNode::cloneNode 
    ([  bool $deep 
  ] )
  public int  DOMNode::getLineNo 
    ( void
   )
  public string  DOMNode::getNodePath 
    ( void
   )
  public bool  DOMNode::hasAttributes 
    ( void
   )
  public bool  DOMNode::hasChildNodes 
    ( void
   )
  public DOMNode  DOMNode::insertBefore 
    (   DOMNode  $newnode 
   [,   DOMNode  $refnode 
  ] )
  public bool  DOMNode::isDefaultNamespace 
    (  string $namespaceURI 
   )
  public bool  DOMNode::isSameNode 
    (   DOMNode  $node 
   )
  public bool  DOMNode::isSupported 
    (  string $feature 
   ,  string $version 
   )
  public string  DOMNode::lookupNamespaceURI 
    (  string $prefix 
   )
  public string  DOMNode::lookupPrefix 
    (  string $namespaceURI 
   )
  public void  DOMNode::normalize 
    ( void
   )
  public DOMNode  DOMNode::removeChild 
    (   DOMNode  $oldnode 
   )
  public DOMNode  DOMNode::replaceChild 
    (   DOMNode  $newnode 
   ,   DOMNode  $oldnode 
   )
   }

  属性
 
  publicId  
  
       The public identifier associated with the entity if specified, and
        NULL  otherwise.
      
 
   systemId  
  
       The system identifier associated with the entity if specified, and
        NULL  otherwise. This may be an absolute URI or not.
      
 
   notationName  
  
       For unparsed entities, the name of the notation for the entity. For
       parsed entities, this is  NULL .
      
 
   actualEncoding  
  
       An attribute specifying the encoding used for this entity at the
       time of parsing, when it is an external parsed entity. This is
        NULL  if it an entity from the internal subset or if it is not 
       known.
      
 
   encoding  
  
       An attribute specifying, as part of the text declaration, the
       encoding of this entity, when it is an external parsed entity. This
       is  NULL  otherwise.
      
 
   version  
  
       An attribute specifying, as part of the text declaration, the
       version number of this entity, when it is an external parsed
       entity. This is  NULL  otherwise.

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