PHP パンくず

<?php
class BreadCrumbs{

    public $separator   = "&nbsp;&gt;&nbsp;";
    public $indexkey    = "index";
    public $wrap        = "li";
    public $text        = "";


    public function __construct(){

        $this -> pattern = array();
        $this -> uri     = "";

    }

    public function setPattern( $arg ){
        $this -> pattern = $arg;
    }

    public function setURI($arg){
        $this -> uri = $this -> trimURI($arg);      
    }

    public function setAfterText($arg){
        $this -> text = $arg;
    }

    public function setIndexKey($arg){
        $this -> indexkey = $arg;
    }

    public function setWrap($arg){
        $this -> wrap = $arg;
    }

    public function setSeparator( $arg ){
        $this -> separator = $arg;
    }

    public function getString(){
        $str = "";
        if($this->uri == "") $this->uri = $this->trimURI($_SERVER["REQUEST_URI"]);

        $exp = explode("/",$this->trimURI($this->uri));
        $v = $this -> patternSearch($this->pattern,$exp);   

        if(!$v)return false;

        if($this->extraPattern($this -> uri)){
            unset($v[1][count($v[1])-1]);
        }
        foreach($v[1] as $e){
            $str .= $this -> link($e["name"],$e["url"]);
            $str .= $this -> separator."\n";
        }

        $str .= is_string($v[0])? $v[0]: (is_object($v[0])?$v[0]():"E");
        return $str;
    }

    private function extraPattern($uri){
        $regex = "/^\/.*?\/$/";
        return preg_match($regex,$uri);
    }


    private function patternSearch($v,$exp){
        $uri    = "";
        $cnt    = count($exp);
        $history= array();
        for($i =0; $i<$cnt;$i++){
            if(isset($result) && is_array($result) && isset($result["index"])) {
                $history[] = array( "name"  => $result["index"], "url"  => $uri);
            }
            $result = $this -> inArrayKey($v,$exp[$i]);
            if($result === false) return false;
            if(is_array($result)){
                $uri .= $exp[$i]."/";
            }else{
                $uri .= $exp[$i];
            }
            $v = $result;               
        }
        return array($v,$history);
    }

    private function inArrayKey($v,$x){
        if( $x == "") $x = $this -> indexkey;
        return (is_array($v) && isset($v[$x]))?$v[$x]:false;
    }

    private function link($text,$url){
        if($this -> wrap != ""){
            return "<{$this->wrap}><a href=\"{$url}\">{$text}</a>{$this->text}</{$this->wrap}>";    
        }
        return "<a href=\"{$url}\">{$text}</a>";    
    }

    private function trimURI( $uri ){

        if(strpos($uri,'?')!== false){
            list($uri) = explode('?',$uri,2);   
        }
        if(strpos($uri,'#')!== false){
            list($uri) = explode('#',$uri,2);
        }
        return $uri;
    }


}


$pattern = array(
    "index"=>array(
            "index"     => "TOP",
        "contents"  => array("index"=> "コンテンツ","archive"=>function(){return "アーカイブ";}),
        "contact"   => array("index"=> "お問い合わせ"),
        ),      
);
$bc = new BreadCrumbs();
$bc -> setPattern($pattern);
$bc -> setWrap("span");
$bc -> setURI("/contents/archive");
echo $bc -> getString();

実行結果

<span><a href="/">TOP</a></span>&nbsp;&gt;&nbsp;
<span><a href="/contents/">コンテンツ</a></span>&nbsp;&gt;&nbsp;
アーカイブ