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Configuration
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 allowTag($tag_name)
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 allowAttribute( $tag_name, $attribute_name, $attribute_regexp = "/.*/" )
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 isAllowedTag($tag_name)
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 isAllowedAttribute( $tag_name, $attribute_name, $attribute_value )
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<?php
namespace AthosHun\HTMLFilter;
class Configuration
{
private $allowed_tags_with_attributes;
public function __construct()
{
$this->allowed_tags_with_attributes = array();
}
public function allowTag($tag_name)
{
if (!$this->isAllowedTag($tag_name)) {
$this->allowed_tags_with_attributes[(string)$tag_name] = array();
}
return $this;
}
public function allowAttribute(
$tag_name,
$attribute_name,
$attribute_regexp = "/.*/"
) {
$this->allowTag($tag_name);
$tag = (string)$tag_name;
$attr = (string)$attribute_name;
$this->allowed_tags_with_attributes[$tag][$attr] = $attribute_regexp;
return $this;
}
public function isAllowedTag($tag_name)
{
return array_key_exists((string)$tag_name,
$this->allowed_tags_with_attributes);
}
public function isAllowedAttribute(
$tag_name,
$attribute_name,
$attribute_value
) {
if (!$this->isAllowedTag($tag_name)) {
return false;
}
$tag = (string)$tag_name;
$attr = (string)$attribute_name;
$allowed_attributes = $this->allowed_tags_with_attributes[$tag];
if (!array_key_exists($attr, $allowed_attributes)) {
return false;
}
$restriction = $allowed_attributes[$attr];
return 1 === preg_match($restriction, $attribute_value);
}
}