php实现根据字符串生成对应数组的方法

本文实例讲述了php实现根据字符串生成对应数组的方法，是比较实用的技巧。分享给大家供大家参考。具体方法如下：

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
)
)
)

希望本文所述对大家PHP程序设计的学习有所帮助。