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<?php
/**
* Object that provides entity lookup table from entity name to character
*/
class HTMLPurifier_EntityLookup
{
/**
* Assoc array of entity name to character represented.
* @type array
*/
public $table;
/**
* Sets up the entity lookup table from the serialized file contents.
* @param bool $file
* @note The serialized contents are versioned, but were generated
* using the maintenance script generate_entity_file.php
* @warning This is not in constructor to help enforce the Singleton
*/
public function setup($file = false)
{
if (!$file) {
$file = HTMLPURIFIER_PREFIX . '/HTMLPurifier/EntityLookup/entities.ser';
}
$this->table = unserialize(file_get_contents($file));
}
/**
* Retrieves sole instance of the object.
* @param bool|HTMLPurifier_EntityLookup $prototype Optional prototype of custom lookup table to overload with.
* @return HTMLPurifier_EntityLookup
*/
public static function instance($prototype = false)
{
// no references, since PHP doesn't copy unless modified
static $instance = null;
if ($prototype) {
$instance = $prototype;
} elseif (!$instance) {
$instance = new HTMLPurifier_EntityLookup();
$instance->setup();
}
return $instance;
}
}
// vim: et sw=4 sts=4
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