如何通过php 将print_r处理后的数据还原为原始数组的方法

程序员文章站 2022-04-06 13:41:15

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

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