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
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
$print_r_data = <<<TXT
Array
(
[name] => fdipzone
[gender] => male
[age] => 18
[profession] => programmer
[detail] => Array(
[grade] => 1
[addtime] => 2016-10-31
)
)
TXT;
// 显示打印的数据
echo '显示打印的数据
';
echo '
'.$print_r_data.'';
$oRestorePrint = new RestorePrint;
$oRestorePrint->set('Array','group');
$oRestorePrint->set(' [','brackets,[');
$oRestorePrint->set('] => ',]');
$oRestorePrint->set(')',)');
$oRestorePrint->parse($print_r_data);
$result = $oRestorePrint->res;
echo '还原为数组
';
var_dump($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)
原文链接：https://www.f2er.com/php/18635.html