< ?php
class tree {
var $arr = array();
var $icon = array('│','├','└');
var $ret = '';
var $parentid = 'parentid';
function tree($arr=array()) {
$this->arr = $arr;
$this->ret = '';
return is_array($arr);
}
function get_parent($myid) {
$newarr = array();
if(!isset($this->arr[$myid])) return false;
$pid = $this->arr[$myid][$this->parentid];
if(isset($this->arr[$pid][$this->parentid])) {
$pid = $this->arr[$pid][$this->parentid];
foreach($this->arr as $id => $a) {
if($a[$this->parentid] == $pid) $newarr[$id] = $a;
}
}
return $newarr;
}
function get_child($myid) {
$a = $newarr = array();
if(is_array($this->arr)) {
foreach($this->arr as $id => $a) {
if($a[$this->parentid] == $myid) $newarr[$id] = $a;
}
}
return $newarr ? $newarr : false;
}
function get_pos($myid,&$newarr) {
$a = array();
if(!isset($this->arr[$myid])) return false;
$newarr[] = $this->arr[$myid];
$pid = $this->arr[$myid][$this->parentid];
if(isset($this->arr[$pid])) {
$this->get_pos($pid,$newarr);
}
if(is_array($newarr)){
krsort($newarr);
foreach($newarr as $v){
$a[$v['id']] = $v;
}
}
return $a;
}
function get_tree($myid, $str, $sid = 0, $adds = '', $str_group = '') {
$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 = $id==$sid ? 'selected' : '';
@extract($a);
$parentid == 0 && $str_group ? eval("\$nstr = \"$str_group\";") : eval("\$nstr = \"$str\";");
$this->ret .= $nstr;
$this->get_tree($id, $str, $sid, $adds.$k.' ',$str_group);
$number++;
}
}
return $this->ret;
}
function get_tree_multi($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' : '';
//echo $sid.'=>'.$id.' : '.$selected.' .
';
@extract($a);
eval("\$nstr = \"$str\";");
$this->ret .= $nstr;
$this->get_tree_multi($id, $str, $sid, $adds.$k.' ');
$number++;
}
}
return $this->ret;
}
function have($list,$item){
return(strpos(','.$list.',',','.$item.','));
}
}
? >
< ?php
$a = $newarr = array();
echo $newarr ? '1' : '2';
$category = array(
1 => array('id'=>'1','parentid'=>0,'name'=>'一级栏目一'),
2 => array('id'=>'2','parentid'=>0,'name'=>'一级栏目二'),
3 => array('id'=>'3','parentid'=>1,'name'=>'二级栏目一'),
4 => array('id'=>'4','parentid'=>1,'name'=>'二级栏目二'),
5 => array('id'=>'5','parentid'=>2,'name'=>'二级栏目三'),
6 => array('id'=>'6','parentid'=>3,'name'=>'三级栏目一'),
7 => array('id'=>'7','parentid'=>3,'name'=>'三级栏目二')
);
$tree = new tree($category);
//$tree->parentid = 'fid';
$str = $tree->get_tree(0, "< option value=\$id \$selected>\$spacer\$name< /option>");
echo '< select name="myselect">',$str,'< /select>
';
$str = $tree->get_tree_multi(0, "< option value=\$id \$selected>\$spacer\$name< /option>", '1,3,5' );
echo '< select size="5" name="yourlike[]" multiple>',$str,'< /select>
';
//print_r( $tree->get_parent(5));
//print_r( $tree->get_child(3));
//print_r( $tree->get_pos(7,$category));
? > 21朵
1个
