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php寫的設定過濾及保留屬性的類

WBOY

發布： 2016-07-25 09:04:19

原創

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/**
@ 設定與保留屬性的類別
@ class cleanHtml
@ link：bbs.it-home.org
@ date：2013/2/28
*/
function reg_escape( $str )
{
$conversions = array ( $str )
{
$conversions = array ( $str )
{
$conversions = array ( $str )
{
$conversions = array ( $str )
{
$conversions = array ( $str )
{
$conversions = array ( $str 是"^" => "^", "[" => "[", "." => ".", "$" => "$", "{" => "{", "*" => “*”，“（”=>“（”，“\”=>“\\”，“/”=>“/”，“+”=>“+”，“）”=>“）”， “|”=>“|”，“？”=>“？”，““”=>；“>”）；
return strtr( $str, $conversions );
}
/**
* 剝離屬性類別
* 從 XML 元素中刪除屬性
* @author David (semlabs.co.uk)
* @version 0.2.1
*/
class cleanHtml{
public $str = '';
public $allow = array();
public $exceptions = array();
public $ignore = array();
public function strip( $str )
{
$this->str = $str;
if( is_string( $str ) && strlen( $str ) > 0 )
{
$res = $this->findElements();
if( is_string( $res ) )
return $res;
$nodes = $this->findAttributes( $res );
$this->removeAttributes( $nodes );
}
return $this->str;
}
private function findElements()
{
# 建立具有屬性的元素陣列
$nodes = array();
preg_match_all( "/n]+)([^>]*)>/i", $this->str, $elements );
foreach( $elements[1] as $el_key => $element )
{
if( $elements[2][$el_key] )
{
$literal = $elements [ 0][$el_key];
$element_name = $elements[1][$el_key];
$attributes = $elements[2][$el_key];
if( is_array( $this->ignore ) && !in_array( $element_name, $this->ignore ) )
$nodes[] = array( 'literal' => $literal, 'name ' => $element_name, '屬性' => $attributes );
}
}
# 如果沒有要刪除的屬性，則傳回 XML
if( !$nodes[0] )
return $this->str;
else
回傳 $nodes;
}
private function findAttributes( $nodes )
{
# 提取屬性
foreach( $nodes as &$node )
( "/([^ =]+)s*=s*["|']{0,1}([^"']*)["|']{0,1}/i", $node[ '屬性'], $attributes );
if( $attributes[1] )
{
foreach( $attributes[1] as $att_key => $att )
{
$文字= $attributes[0][$att_key]
$attribute_name = $attributes[1][$att_key]
$value = $attributes[2][$att_key]
$atts [] = array ( 'literal' => $literal, '名稱' => $attribute_name, 'value' => $value );
}
} else $node ['屬性'] = null $node['屬性'] = $atts; 取消設定( $atts ); } 回傳$nodes }
private function removeAttributes( $nodes )
{
# 不需要刪除的屬性
foreach( $nodes as $node )
{
{
{
# 檢查如果節點有任何屬性要保留
$node_name = $node['name'];
$new_attributes = '';
if( is_array( $node['attributes'] ) )
{
foreach( $node['attributes'] as $attribute )
{
if( ( is_array( $this) ($thisy( $this) ->allow ) && in_array( $attribute['name'], $this->allow ) ) || $this->isException( $node_name, $attribute['name'], $this->例外) )
$new_attributes = $this->createAttributes( $new_attributes, $attribute['name'], $attribute['value'] );
}
}
$replacement = ( $new_attributes ) ? “”：""；
$this->str = preg_replace( '/'.reg_escape( $node['literal'] ) .'/', $replacement, $this->str );
}
}
私有函式 isException( $element_name, $attribute_name, $exceptions )
{
if( array_key_exists($elelementname, $-Pel> > {
if( in_array( $attribute_name, $this->exceptions[$element_name] ) )
return true;
}
回傳 false;
}
private function createAttributes( $new_attributes, $name, $value )
{
{ $new_attributes .= " ";
$new_attributes .= "$name="$value"";
回傳 $new_attributes;
}

}