PHP Manual
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(no version information, might be only in CVS)
This functions checks to see if an attribute named name exists in the current node.
The name of the tested attribute.
Returns TRUE if the asked attribute exists, FALSE otherwise.
Example 1. Testing the existence of an attribute
<?phpinclude("example.inc");if (!$dom = domxml_open_mem($xmlstr)) { echo "Error while parsing the document\n"; exit;}$root = $dom->document_element();$buffer = '<html';if ($root->has_attribute('language')) { $buffer .= 'lang="' . $root->get_attribute('language') . '"';}$buffer .= '>';?>
Use DOMElement->hasAttribute().