php寫的設定過濾及保留屬性的類

/**
 @ 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;
 }

複製程式碼

$str = '這裡是一些例子 html，其  被打破了   > ';

$sa = 新的 cleanHtml;
$sa->allow = array( 'id' );

$sa->例外 = array(
 'img' => array( 'src', 'alt' ),
 'a' => array( 'href', '標題' ),
 'iframe'=>array('src','frameborder'),
);

複製程式碼