php实现根据字符串生成对应数组的方法

先看看如下示例：

<?php
$config = array(
 'project|page|index' => 'content',
 'project|page|nav' => array(
 array(
 'image' => '1.jpg',
 'name' => 'home'
 ),
 array(
 'image' => '2.jpg',
 'name' => 'about'
 )
 ),
 'project|page|open' => true
);
?>

根据$config生成以下数组：

<?php
$result = array(
 'project' => array(
 'page' => array(
 'index' => 'content',
 'nav' => array(
  array(
  'image' => '1.jpg',
  'name' => 'home'
  ),
  array(
  'image' => '2.jpg',
  'name' => 'about'
  )
 ),
 'open' => true
 )
 )
);
?>

方法：使用eval实现：

<?php
$config = array(
 'project|page|index' => 'content',
 'project|page|nav' => array(
 array(
 'image' => '1.jpg',
 'name' => 'home'
 ),
 array(
 'image' => '2.jpg',
 'name' => 'about'
 )
 ),
 'project|page|open' => true
); 

$result = array();
foreach($config as $key=>$val){ 

 $tmp = '';
 $keys = explode('|', $key); 

 for($i=0,$len=count($keys); $i<$len; $i++){
 $tmp .= "['".$keys[$i]."']";
 } 

 if(is_array($val)){
 eval('$result'.$tmp.'='.var_export($val,true).';');
 }elseif(is_string($val)){
 eval('$result'.$tmp.'='.$val.';');
 }else{
 eval('$result'.$tmp.'=$val;');
 } 

} 

print_r($result); 

?>

输出结果：

Array
(
[project] => Array
(
[ page ] => Array
(
[index] => content
[nav] => Array
(
[0] => Array
(
[image] => 1.jpg
[name] => home
)
[1] => Array
(
[image] => 2.jpg
[name] => about
)
)
[open] => 1
)
)
)