DOM XML (PHP 4) 函数
PHP Manual

DomElement->has_attribute

(PHP 4 >= 4.1.0)

DomElement->has_attribute Checks to see if an attribute exists in the current node

说明

bool DomElement::has_attribute ( string $name )

This functions checks to see if an attribute named name exists in the current node.

参数

name

The name of the tested attribute.

返回值

Returns TRUE if the asked attribute exists, FALSE otherwise.

范例

Example #1 Testing the existence of an attribute

<?php

include("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 .= '>';

?>

Migrating to PHP 5

Use DOMElement::hasAttribute.


DOM XML (PHP 4) 函数
PHP Manual