DOMElement::removeAttribute()

(PHP 5, PHP 7)

Removes attribute

说明

publicDOMElement::removeAttribute(string $name): bool

Removes attribute named$namefrom the element.

参数

$name: The name of the attribute.

返回值

成功时返回TRUE，或者在失败时返回FALSE。

错误／异常

DOM_NO_MODIFICATION_ALLOWED_ERR: Raised if the node is readonly.

参见

DOMElement::hasAttribute() Checks to see if attribute exists
DOMElement::getAttribute() Returns value of attribute
DOMElement::setAttribute() Adds new attribute

<?php
/*When I try to get a some attribute from not validated HTML or XML document, PHP dies with no errors in logs or output:
*/
    function is_attribute_value($obj,$type,$value)
    {
      $_ret=false;
      if($obj)
      {
        if($val=$obj->getAttribute($type))
        {
          if($val==$value)
          {
            $_ret=true;
          }
        }
      }
      return $_ret;
    }
//And this check helped to me:
    function is_attribute_value($obj,$type,$value)
    {
      $_ret=false;
      if($obj->attributes)
      {
        if($val=$obj->getAttribute($type))
        {
          if($val==$value)
          {
            $_ret=true;
          }
        }
      }
      return $_ret;
    }
?>

<?php
//Store your html into $html variable.
$html="<html>
<head>
<title>Rakesh Verma</title>
</head>
<body>
  <a href='http://example.com'>Example</a>
  <a href='http://google.com'>Google</a>
  <a href='http://www.yahoo.com'>Yahoo</a>
</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.".au";
    //remove and set href attribute    
    $href->removeAttribute('href');
    $href->setAttribute("href", $newURL);
}
// save html
$html=$dom->saveHTML();
echo $html;
?>