php将print_r处理后的数据还原为原始数组的解决方法

public function __construct() {
$this->stack[] =& $this->res;
}

public function __call($method,$param){
echo $this->buf .' not defined mehtod:'.$method. ' param:'.implode(',',$param);
}

public function set($word,$value=''){
if(is_array($word)){
foreach($word as $k=>$v){
$this->set($k,$v);
}
}
$p =& $this->dict;
foreach(str_split($word) as $ch){
if(!isset($p[$ch])){
$p[$ch] = array();
}
$p =& $p[$ch];
}
$p['val'] = $value;
return $this;
}

public function parse($str){
$this->doc = $str;
$this->len = strlen($str);
$i = 0;
while($i < $this->len){
$t = $this->find($this->dict,$i);
if($t){
$i = $t;
$this->buf = '';
}else{
$this->buf .= $this->doc{$i++};
}
}
}

protected function find(&$p,$i){
if($i >= $this->len){
return $i;
}
$t = 0;
$n = $this->doc{$i};
if(isset($p[$n])){
$t = $this->find($p[$n],$i+1);
}
if($t){
return $t;
}
if(isset($p['val'])){
$arr = explode(',$p['val']);
call_user_func_array(array($this,array_shift($arr)),$arr);
return $i;
}
return $t;
}

protected function group(){
if(!$this->keyname){
return ;
}
$cnt = count($this->stack)-1;
$this->stack[$cnt][$this->keyname] = array();
$this->stack[] =& $this->stack[$cnt][$this->keyname];
$this->keyname = '';
}

protected function brackets($c){
$cnt = count($this->stack)-1;
switch($c){
case ')':
if($this->keyname){
$this->stack[$cnt][$this->keyname] = trim($this->buf);
}
$this->keyname = '';
array_pop($this->stack);
break;

  case '[':
    if($this->keyname){
      $this->stack[$cnt][$this->keyname] = trim($this->buf);
    }
    break;

  case ']':
    $this->keyname = $this->buf;
    break;
}
$this->buf = '';

}

} // class end
?>

demo.php

'.$print_r_data.'