php遞歸優化

php遞歸優化

標籤(空格分隔): php

通用PHP樹類

<?php

/**
 * 通用的樹型類,可以生成任何樹型結構
 */
namespace utils;
class Tree {

/**
 * 生成樹型結構所需要的2維數組
 * @var array
 */
public $arr = array();

/**
 * 生成樹型結構所需修飾符號,可以換成圖片
 * @var array
 */
public $icon = array('│', '├', '└');
public $nbsp = "&nbsp;";
private $str ='';
/**
 * @access private
 */
public $ret = '';
public $org = [];

/**
 * 構造函數,初始化類
 * @param array 2維數組,例如:
 * array(
 *      1 => array('id'=>'1','parentid'=>0,'name'=>'一級欄目一'),
 *      2 => array('id'=>'2','parentid'=>0,'name'=>'一級欄目二'),
 *      3 => array('id'=>'3','parentid'=>1,'name'=>'二級欄目一'),
 *      4 => array('id'=>'4','parentid'=>1,'name'=>'二級欄目二'),
 *      5 => array('id'=>'5','parentid'=>2,'name'=>'二級欄目三'),
 *      6 => array('id'=>'6','parentid'=>3,'name'=>'三級欄目一'),
 *      7 => array('id'=>'7','parentid'=>3,'name'=>'三級欄目二')
 *      )
 */
public function init($arr=array()) {
    $this->arr = $arr;
    $this->ret = '';
    return is_array($arr);
}

/**
 * 得到父級數組
 * @param int
 * @return array
 */
public function get_parent($myid) {
    $newarr = array();
    if (!isset($this->arr[$myid]))
        return false;
    $pid = $this->arr[$myid]['parentid'];
    $pid = $this->arr[$pid]['parentid'];
    if (is_array($this->arr)) {
        foreach ($this->arr as $id => $a) {
            if ($a['parentid'] == $pid)
                $newarr[$id] = $a;
        }
    }
    return $newarr;
}

/**
 * 得到子級數組
 * @param int
 * @return array
 */
public function get_child($myid) {
    $a = $newarr = array();
    if (is_array($this->arr)) {
        foreach ($this->arr as $id => $a) {
            if ($a['parentid'] == $myid)
                $newarr[$id] = $a;
        }
    }
    return $newarr ? $newarr : false;
}



/**
 * 得到當前位置數組
 * @param int
 * @return array
 */
public function get_pos($myid, &$newarr) {
    $a = array();
    if (!isset($this->arr[$myid]))
        return false;
    $newarr[] = $this->arr[$myid];
    $pid = $this->arr[$myid]['parentid'];
    if (isset($this->arr[$pid])) {
        $this->get_pos($pid, $newarr);
    }
    if (is_array($newarr)) {
        krsort($newarr);
        foreach ($newarr as $v) {
            $a[$v['id']] = $v;
        }
    }
    return $a;
}

/**
 * 得到樹型結構
 * @param int ID,表示獲得這個ID下的所有子級
 * @param string 生成樹型結構的基本代碼,例如:"<option value=\$id \$selected>\$spacer\$name</option>"
 * @param int 被選中的ID,比如在做樹型下拉框的時候需要用到
 * @return string
 */
public function get_tree($myid, $str, $sid = 0, $adds = '', $str_group = '') {
    $number = 1;
    //一級欄目
    $child = $this->get_child($myid);
    if (is_array($child)) {
        $total = count($child);
        foreach ($child as $id => $value) {
            $j = $k = '';
            if ($number == $total) {
                $j .= $this->icon[2];
            } else {
                $j .= $this->icon[1];
                $k = $adds ? $this->icon[0] : '';
            }
            $spacer = $adds ? $adds . $j : '';
            $selected = $id == $sid ? 'selected' : '';
            @extract($value);
            $parentid == 0 && $str_group ? eval("\$nstr = \"$str_group\";") : eval("\$nstr = \"$str\";");
            $this->ret .= $nstr;
            $nbsp = $this->nbsp;
            $this->get_tree($id, $str, $sid, $adds . $k . $nbsp, $str_group);
            $number++;
        }
    }
    return $this->ret;
}

/**
 * 得到樹型結構
 * @param int ID,表示獲得這個ID下的所有子級
 * @param string 生成樹型結構的基本代碼,例如:"<option value=\$id \$selected>\$spacer\$name</option>"
 * @param int 被選中的ID,比如在做樹型下拉框的時候需要用到
 * @return string
 */
public function get_order_org($myid) {
    $number = 1;
    //一級欄目
    $child = $this->get_child($myid);
    if (is_array($child)) {
        foreach ($child as $id => $value) {
            $name  = $value['bmming'];
            if($value['level'] > 1) {
                $name  = '|' . str_repeat('__', $value['level']) . ' ' . $name;
            }
            $this->org[] = ['value'=> $value['id'], 'text' => $name] ;
            $this->get_order_org($value['id']);
            $number++;
        }
    }
    return $this->org;
}

/**
 * 得到樹型結構數組
 * @param int ID,表示獲得這個ID下的所有子級
 * @param string 生成樹型結構的基本代碼,例如:"<option value=\$id \$selected>\$spacer\$name</option>"
 * @param int 被選中的ID,比如在做樹型下拉框的時候需要用到
 * @return array
 */
public function get_tree_array($myid, $str = '', $sid = 0, $adds = '', $str_group = '') {
    $retarray = array();
    //一級欄目數組
    $child = $this->get_child($myid);
    if (is_array($child)) {
        //數組長度
        foreach ($child as $id => $value) {
            @extract($value);
            $retarray[$value['id']] = $value;
            $retarray[$value['id']]["child"] = $this->get_tree_array($id, '');
        }
    }
    return $retarray;
}

/**
 * 同上一方法類似,但允許多選
 *
 * @param $myid
 * @param $str
 * @param int $sid
 * @param string $adds
 * @return string
 */
public function get_tree_multi($myid, $str, $sid = 0, $adds = '') {
    $number = 1;
    $child = $this->get_child($myid);
    if (is_array($child)) {
        $total = count($child);
        foreach ($child as $id => $a) {
            $j = $k = '';
            if ($number == $total) {
                $j .= $this->icon[2];
            } else {
                $j .= $this->icon[1];
                $k = $adds ? $this->icon[0] : '';
            }
            $spacer = $adds ? $adds . $j : '';

            $selected = $this->have($sid, $id) ? 'selected' : '';
            @extract($a);
            eval("\$nstr = \"$str\";");
            $this->ret .= $nstr;
            $this->get_tree_multi($id, $str, $sid, $adds . $k . '&nbsp;');
            $number++;
        }
    }
    return $this->ret;
}

/**
 * @param integer $myid 要查詢的ID
 * @param string $str   第一種HTML代碼方式
 * @param string $str2  第二種HTML代碼方式
 * @param integer $sid  默認選中
 * @param string $adds 前綴
 * @return string
 */
public function get_tree_category($myid, $str, $str2, $sid = 0, $adds = '') {
    $number = 1;
    $child = $this->get_child($myid);
    if (is_array($child)) {
        $total = count($child);
        foreach ($child as $id => $a) {
            $j = $k = '';
            if ($number == $total) {
                $j .= $this->icon[2];
            } else {
                $j .= $this->icon[1];
                $k = $adds ? $this->icon[0] : '';
            }
            $spacer = $adds ? $adds . $j : '';

            $selected = $this->have($sid, $id) ? 'selected' : '';
            @extract($a);
            if (empty($html_disabled)) {
                eval("\$nstr = \"$str\";");
            } else {
                eval("\$nstr = \"$str2\";");
            }
            $this->ret .= $nstr;
            $this->get_tree_category($id, $str, $str2, $sid, $adds . $k . '&nbsp;');
            $number++;
        }
    }
    return $this->ret;
}

/**
 * 同上一類方法,jquery treeview 風格,可伸縮樣式(需要treeview插件支持)
 * @param $myid 表示獲得這個ID下的所有子級
 * @param $effected_id 需要生成treeview目錄數的id
 * @param $str 末級樣式
 * @param $str2 目錄級別樣式
 * @param $showlevel 直接顯示層級數,其餘爲異步顯示,0爲全部限制
 * @param $style 目錄樣式 默認 filetree 可增加其他樣式如'filetree treeview-famfamfam'
 * @param $currentlevel 計算當前層級,遞歸使用 適用改函數時不需要用該參數
 * @param $recursion 遞歸使用 外部調用時爲FALSE
 * @return string
 */
function get_treeview($myid, $effected_id='example', $str="<span class='file'>\$name</span>", $str2="<span class='folder'>\$name</span>", $showlevel = 0, $style='filetree ', $currentlevel = 1, $recursion=FALSE) {
    $child = $this->get_child($myid);
    if (!defined('EFFECTED_INIT')) {
        $effected = ' id="' . $effected_id . '"';
        define('EFFECTED_INIT', 1);
    } else {
        $effected = '';
    }
    $placeholder = '<ul><li><span class="placeholder"></span></li></ul>';
    if (!$recursion)
        $this->str .='<ul' . $effected . '  class="' . $style . '">';
    foreach ($child as $id => $a) {

        @extract($a);
        if ($showlevel > 0 && $showlevel == $currentlevel && $this->get_child($id))
            $folder = 'hasChildren'; //如設置顯示層級模式@2011.07.01
        $floder_status = isset($folder) ? ' class="' . $folder . '"' : '';
        $this->str .= $recursion ? '<ul><li' . $floder_status . ' id=\'' . $id . '\'>' : '<li' . $floder_status . ' id=\'' . $id . '\'>';
        $recursion = FALSE;
        //判斷是否爲終極欄目
        if ($child == 1) {
            eval("\$nstr = \"$str2\";");
            $this->str .= $nstr;
            if ($showlevel == 0 || ($showlevel > 0 && $showlevel > $currentlevel)) {
                $this->get_treeview($id, $effected_id, $str, $str2, $showlevel, $style, $currentlevel + 1, TRUE);
            } elseif ($showlevel > 0 && $showlevel == $currentlevel) {
                $this->str .= $placeholder;
            }
        } else {
            eval("\$nstr = \"$str\";");
            $this->str .= $nstr;
        }
        $this->str .=$recursion ? '</li></ul>' : '</li>';
    }
    if (!$recursion)
        $this->str .='</ul>';
    return $this->str;
}

/**
 * 同上一類方法,jquery treeview 風格,可伸縮樣式(需要treeview插件支持)
 * @param $myid 表示獲得這個ID下的所有子級
 * @param $effected_id 需要生成treeview目錄數的id
 * @param $str 末級樣式
 * @param $str2 目錄級別樣式
 * @param $showlevel 直接顯示層級數,其餘爲異步顯示,0爲全部限制
 * @param $style 目錄樣式 默認 filetree 可增加其他樣式如'filetree treeview-famfamfam'
 * @param $currentlevel 計算當前層級,遞歸使用 適用改函數時不需要用該參數
 * @param $recursion 遞歸使用 外部調用時爲FALSE
 * @param $dropdown 有子元素時li的class
 */ 

function get_treeview_menu($myid,$effected_id='example', $str="<span class='file'>\$name</span>", $str2="<span class='folder'>\$name</span>", $showlevel = 0,  $ul_class="" ,$li_class="" , $style='filetree ', $currentlevel = 1, $recursion=FALSE, $dropdown='hasChild') {
    $child = $this->get_child($myid);
	if (!defined('EFFECTED_INIT')) {
		$effected = ' id="' . $effected_id . '"';
		define('EFFECTED_INIT', 1);
	} else {
		$effected = '';
	}
$placeholder = '<ul><li><span class="placeholder"></span></li></ul>';
	if (!$recursion){
		$this->str .='<ul' . $effected . '  class="' . $style . '">';
	}

	foreach ($child as $id => $a) {

		@extract($a);
		if ($showlevel > 0 && is_array($this->get_child($a['id']))){
			$floder_status = " class='$dropdown $li_class'";
		}else{
			$floder_status = " class='$li_class'";;
		}
		$this->str .= $recursion ? "<ul class='$ul_class'><li  $floder_status id= 'menu-item-$id'>" : "<li  $floder_status   id= 'menu-item-$id'>";
		$recursion = FALSE;
		//判斷是否爲終極欄目
		if ($this->get_child($a['id'])) {
			eval("\$nstr = \"$str2\";");
			$this->str .= $nstr;
			if ($showlevel == 0 || ($showlevel > 0 && $showlevel > $currentlevel)) {
				$this->get_treeview_menu($a['id'], $effected_id, $str, $str2, $showlevel,   $ul_class ,$li_class ,$style, $currentlevel + 1, TRUE);
			} elseif ($showlevel > 0 && $showlevel == $currentlevel) {
				//$this->str .= $placeholder;
			}
		} else {
			eval("\$nstr = \"$str\";");
			$this->str .= $nstr;
		}
		$this->str .=$recursion ? '</li></ul>' : '</li>';
	}
	if (!$recursion)
		$this->str .='</ul>';
	return $this->str;
}

/**
 * 獲取子欄目json
 * Enter description here ...
 * @param unknown_type $myid
 */
public function creat_sub_json($myid, $str='') {
    $sub_cats = $this->get_child($myid);
    $n = 0;
    if (is_array($sub_cats))
        foreach ($sub_cats as $c) {
            $data[$n]['id'] = iconv(CHARSET, 'utf-8', $c['catid']);
            if ($this->get_child($c['catid'])) {
                $data[$n]['liclass'] = 'hasChildren';
                $data[$n]['children'] = array(array('text' => '&nbsp;', 'classes' => 'placeholder'));
                $data[$n]['classes'] = 'folder';
                $data[$n]['text'] = iconv(CHARSET, 'utf-8', $c['catname']);
            } else {
                if ($str) {
                    @extract(array_iconv($c, CHARSET, 'utf-8'));
                    eval("\$data[$n]['text'] = \"$str\";");
                } else {
                    $data[$n]['text'] = iconv(CHARSET, 'utf-8', $c['catname']);
                }
            }
            $n++;
        }
    return json_encode($data);
}

private function have($list, $item) {
    return(strpos(',,' . $list . ',', ',' . $item . ','));
}

}

發表評論
所有評論
還沒有人評論,想成為第一個評論的人麼? 請在上方評論欄輸入並且點擊發布.
相關文章