PHP json_encode输出josn格式并解决中文乱码

<?php
header('Content-type: text/json');

$fruits = array (
    "fruits"  => array("a" => "orange", "b" => "banana", "c" => "apple"),
    "numbers" => array(1, 2, 3, 4, 5, 6),
    "holes"   => array("first", 5 => "second", "third")
);
echo json_encode($fruits);
?>

<?php
$array = array
 (
   'title'=>iconv('gb2312','utf-8','这里是中文标题'),
  'body'=>'abcd...'
 );

echo json_encode($array);
?>

{"title":"u8fd9u91ccu662fu4e2du6587u6807u9898","body":"abcd..."}

$(function(){
     $('#send').click(function() {
          $.getJSON('json.php', function(data) {
              $('#resText').empty();
   var html = '';
   $.each( data  , function(commentIndex, comment) {
    html += '<div class="comment"><h6>' + comment['username'] + ':</h6><p class="para">' + comment['content'] + '</p></div>';
   })
  $('#resText').html(html);
         })
    })
})

<?php
/**************************************************************
 *
 * 使用特定function对数组中所有元素做处理
 * @param string &$array  要处理的字符串
 * @param string $function 要执行的函数
 * @return boolean $apply_to_keys_also  是否也应用到key上
 * @access public
 *
 *************************************************************/
function arrayRecursive(&$array, $function, $apply_to_keys_also = false)
{
    static $recursive_counter = 0;
    if (++$recursive_counter > 1000) {
        die('possible deep recursion attack');
    }
    foreach ($array as $key => $value) {
        if (is_array($value)) {
            arrayRecursive($array[$key], $function, $apply_to_keys_also);
        } else {
            $array[$key] = $function($value);
        }
 
        if ($apply_to_keys_also && is_string($key)) {
            $new_key = $function($key);
            if ($new_key != $key) {
                $array[$new_key] = $array[$key];
                unset($array[$key]);
            }
        }
    }
    $recursive_counter--;
}
 
/**************************************************************
 *
 * 将数组转换为JSON字符串（兼容中文）
 * @param array $array  要转换的数组
 * @return string  转换得到的json字符串
 * @access public
 *
 *************************************************************/
function JSON($array) {
 arrayRecursive($array, 'urlencode', true);
 $json = json_encode($array);
 return urldecode($json);
}

$array = array
       (
          'Name'=>'希亚',
          'Age'=>20
       );

echo JSON($array);
?>

public function request($method = null)
    {
        if (! $this->uri instanceof Zend_Uri_Http) {
            /** @see Zend_Http_Client_Exception */
            require_once 'Zend/Http/Client/Exception.php';
            throw new Zend_Http_Client_Exception('No valid URI has been passed to the client');
        }

        if ($method) {
            $this->setMethod($method);
        }
        $this->redirectCounter = 0;
        $response = null;

        // Make sure the adapter is loaded
        if ($this->adapter == null) {
            $this->setAdapter($this->config['adapter']);
        }

        // Send the first request. If redirected, continue.
        do {
            // Clone the URI and add the additional GET parameters to it
           //省略一万字
        } while ($this->redirectCounter < $this->config['maxredirects']);

        return $response;
    }

class db {
    private $mysqli; //数据库连接
    private $options; //SQL选项
    private $tableName; //表名
    public function __construct($tabName) {
        $this->tableName = $tabName;
        $this->db ();
    }
    private function db() {
        $this->mysqli = new mysqli ( 'localhost', 'root', '', 'hdcms' );
        $this->mysqli->query("SET NAMES GBK");
    }
    public function fields($fildsArr) {
        if (empty ( $fildsArr )) {
            $this->options ['fields'] = '';
        }
        if (is_array ( $fildsArr )) {
            $this->options ['fields'] = implode ( ',', $fildsArr );
        } else {
            $this->options ['fields'] = $fildsArr;
        }
        return $this;
    }
    public function order($str) {
        $this->options ['order'] = "ORDER BY " . $str;
        return $this;
    }
    public function select() {
        $sql = "SELECT {$this->options['fields']} FROM {$this->tableName}  {$this->options['order']}";
        return $this->query ( $sql );
    }
    private function query($sql) {
        $result = $this->mysqli
            ->query ( $sql );
        $rows = array ();
        while ( $row = $result->fetch_assoc () ) {
            $rows [] = $row;
        }
        return $rows;
    }
    private function close() {
        $this->mysqli
            ->close ();
    }
    function __destruct() {
        $this->close ();
    }
}
$chanel = new db ( "hdw_channel" );
$chanelInfo = $chanel->fields ( 'id,cname,cpath' )
    ->select ();
echo "<pre>";
print_r ( $chanelInfo );

class a {
    protected  function aa(){
        echo 222;
    }
}
class b extends a{
    function bb(){
        $this->aa();
    }
}
$c = new b();
$c->bb();

/**
 * 创建父节点树形数组
 * 参数
 * $ar 数组，邻接列表方式组织的数据
 * $id 数组中作为主键的下标或关联键名
 * $pid 数组中作为父键的下标或关联键名
 * 返回 多维数组
 **/
function find_parent($ar, $id='id', $pid='pid') {
  foreach($ar as $v) $t[$v[$id]] = $v;
  foreach ($t as $k => $item){
    if( $item[$pid] ){
      if( ! isset($t[$item[$pid]]['parent'][$item[$pid]]) )
         $t[$item[$id]]['parent'][$item[$pid]] =& $t[$item[$pid]];

          $t[$k]['reference'] = true;
    }
  }
  return $t;
}

/**
 * 创建子节点树形数组
 * 参数
 * $ar 数组，邻接列表方式组织的数据
 * $id 数组中作为主键的下标或关联键名
 * $pid 数组中作为父键的下标或关联键名
 * 返回 多维数组
 **/
function find_child($ar, $id='id', $pid='pid') {
  foreach($ar as $v) $t[$v[$id]] = $v;
  foreach ($t as $k => $item){
    if( $item[$pid] ) {
      $t[$item[$pid]]['child'][$item[$id]] =& $t[$k];

      $t[$k]['reference'] = true;
    }
  }
  return $t;
}

示例：

$data = array(
    array('ID'=>1, 'PARENT'=>0, 'NAME'=>'祖父'),
    array('ID'=>2, 'PARENT'=>1, 'NAME'=>'父亲'),
    array('ID'=>3, 'PARENT'=>1, 'NAME'=>'叔伯'),
    array('ID'=>4, 'PARENT'=>2, 'NAME'=>'自己'),
    array('ID'=>5, 'PARENT'=>4, 'NAME'=>'儿子')
);
$p = find_parent($data, 'ID', 'PARENT');
$c = find_child($data, 'ID', 'PARENT');

上面两种方法是将所有节点按id平摊到一个数组中，然后找到他们的 parent 或 children ,通过引用将 平摊的元素挂接到 parent 、children 下，

但被引用的元素依然存在于平摊的数组中，因此，在实际应用时，最好标记那些被引用的元素，以避免以他们为根开始遍历，导致重复。

        foreach ($p as $key => $item) {
            if($item['reference']) continue;
            print_r($item);
        }

        foreach ($c as $key => $item) {
            if($item['reference']) continue;
            print_r($item);
        }

递归法，PHP 数组元素被删除后，数组游标会归零，因此在遍历过程中一些已经找到 “归宿” 的元素也不得不留在数组中，无法缩减后继元素的搜索范围：

$mylist = array(array( 'parent_id'=>0,'id'=>1),
                    array( 'parent_id'=>0,'id'=>2),
                    array( 'parent_id'=>0,'id'=>3),   
                    array( 'parent_id'=>2,'id'=>4),
                    array( 'parent_id'=>2,'id'=>5),
                    array( 'parent_id'=>3,'id'=>6),
                    array( 'parent_id'=>3,'id'=>7),   
                    array( 'parent_id'=>4,'id'=>8),
                    array( 'parent_id'=>5,'id'=>9),
                    array( 'parent_id'=>5,'id'=>10)
                );

    function _findChildren($list, $p_id){    //数据层级化，
          $r = array();
          foreach($list as $id=>$item){
            if($item['parent_id'] == $p_id) {
                   $length = count($r);
                  $r[$length] = $item;
                  if($t = $this->_findChildren($list, $item['id']) ){
                      $r[$length]['children'] = $t;
                  }               
            }
          }
          return $r;
    } 
 

print_r(_findChildren($mylist, 0));