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DOMImplementation->hasFeature() — Test if the DOM implementation implements a specific feature
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.
The feature to test.
The version number of the feature to test. In level 2, this can be either 2.0 or 1.0.
如果成功则返回 TRUE，失败则返回 FALSE。
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";
}
}
?>