DOMImplementation::hasFeature

(PHP 5, PHP 7)

DOMImplementation::hasFeature Test if the DOM implementation implements a specific feature

说明

public bool DOMImplementation::hasFeature ( string $feature , string $version )

Test if the DOM implementation implements a specific feature.

You can find a list of all features in the » Conformance section of the DOM specification.

参数

feature

The feature to test.

version

The version number of the feature to test. In level 2, this can be either 2.0 or 1.0.

返回值

成功时返回 TRUE, 或者在失败时返回 FALSE

错误/异常

此方法可以被静态调用,但会抛出一个 E_STRICT 错误。

范例

Example #1 Testing your DOM Implementation

<?php

$features 
= array(
  
'Core'           => 'Core module',
  
'XML'            => 'XML module',
  
'HTML'           => 'HTML module',
  
'Views'          => 'Views module',
  
'Stylesheets'    => 'Style Sheets module',
  
'CSS'            => 'CSS module',
  
'CSS2'           => 'CSS2 module',
  
'Events'         => 'Events module',
  
'UIEvents'       => 'User interface Events module',
  
'MouseEvents'    => 'Mouse Events module',
  
'MutationEvents' => 'Mutation Events module',
  
'HTMLEvents'     => 'HTML Events module',
  
'Range'          => 'Range module',
  
'Traversal'      => 'Traversal module'
);
               
foreach (
$features as $key => $name) {
  if (
DOMImplementation::hasFeature($key'2.0')) {
    echo 
"Has feature $name\n";
  } else {
    echo 
"Missing feature $name\n";
  }
}

?>

参见

add a note add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top