php将print_r处理后的数据还原为原始数组的解决方法

PHP print_r方法可以把变量打印显示，使变量易于理解。如果变量是string,integer或float，将打印变量值本身，如果变量是array，将会按照一定格式显示键和元素。object与数组类似。print_r用于打印数组较多。

php原生没有把print_r方法打印后的数据还原为原始数组，因此写了下面这个方法，实现将print_r处理后的数据还原为原始数组。

RestorePrint.class.php

    <?php
    /**
     * 将print_r处理后的数据还原为原始数组
     * Date:  2016-10-31
     * Author: fdipzone
     * Ver:   1.0
     */
    class RestorePrint{ // class start

      public $res = array();
      protected $dict = array();
      protected $buf = '';
      protected $keyname = '';
      protected $stack = array();

      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

    <?php
    require 'RestorePrint.class.php';

    $print_r_data = <<<TXT
    Array
    (
      [name] => fdipzone
      [gender] => male
      [age] => 18
      [profession] => programmer
      [detail] => Array(
        [grade] => 1
        [addtime] => 2016-10-31
      )
    )
    TXT;

    // 显示打印的数据
    echo '显示打印的数据<br>';
    echo '<pre>'.$print_r_data.'</pre>';

    $oRestorePrint = new RestorePrint;
    $oRestorePrint->set('Array', 'group');
    $oRestorePrint->set(' [', 'brackets,[');
    $oRestorePrint->set('] => ', 'brackets,]');
    $oRestorePrint->set(')', 'brackets,)');

    $oRestorePrint->parse($print_r_data);
    $result = $oRestorePrint->res;

    echo '还原为数组<br>';
    var_dump($result);

    ?>

输出：

显示打印的数据

Array
(
[name] => fdipzone
[gender] => male
[age] => 18
[profession] => programmer
[detail] => Array(
[grade] => 1
[addtime] => 2016-10-31
)
)

还原为数组

array (size=5)
'name' => string 'fdipzone' (length=8)
'gender' => string 'male' (length=4)
'age' => string '18' (length=2)
'profession' => string 'programmer' (length=10)
'detail' =>
array (size=2)
'grade' => string '1' (length=1)
'addtime' => string '2016-10-31' (length=10)

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。