php将print_r处理后的数据还原为原始数组的解决方法

2024-05-04 23:51:46

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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

<?phprequire 'RestorePrint.class.php';$print_r_data = <<<TXTArray(  [name] => fdipzone  [gender] => male  [age] => 18  [profession] => programmer  [detail] => Array(    [grade] => 1    [addtime] => 2016-10-31  ))TXT;// 显示打印的数据echo '显示打印的数据<br>';echo '<pre>'.$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)

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