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PHP使用SimpleXML检查XML文件结构是否合法实例

Jun 08, 2016 pm 05:20 PM
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SimpleXML 函数允许您把 XML 转换为对象。通过普通的属性选择器或数组迭代器,可以处理这个对象,就像处理任何其他对象一样。SimpleXML 函数是 PHP 核心的组成部分。无需安装即可使用这些函数。

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利用 SimpleXML 去检查 XML 结构是否符合规格,为了让这个程序可以多用途,采用了一个基准文件的作为结构准则,依据里面定义的节点跟属性,去检查文件是否符合基本要求的格式。

 代码如下 复制代码
/**检查 XML 文件结构  
* @param string $baseFilePath 基准结构文件  
* @param string $checkFilePath 待检查文件  
* @return bool 当结构与基准文件相符合时则传递 true,否则是 false  
* */   
function checkXmlFileStructure($baseFilePath,$checkFilePath){   
   /*开启 Base File*/   
   if(!file_exists($baseFilePath)){ return false; }   
   $base = simplexml_load_file($baseFilePath);   
   if($base===false){ return false; }   
   
   /*开启 Check File*/   
   if(!file_exists($checkFilePath)){ return false; }   
   $check = simplexml_load_file($checkFilePath);   
   if($check===false){ return false; }   
   
   /*比较起始点的名称*/   
   if($base->getName() != $check->getName()){ return false; }   
   
   /*比较结构*/   
   return checkXmlStructure($base,$check);   
}   
   
/**检查 XML 结构  
* @param SimpleXMLElement $base 基准结构对象  
* @param SimpleXMLElement $check 待检查 XML 对象  
* @return bool 当结构与基准对象相符合时则传递 true,否则是 false  
* */   
function checkXmlStructure($base,$check){   
   /*检查属性*/   
   foreach ($base->attributes() as $name => $baseAttr){   
       /*必要的属性不存在*/   
       if(!isset($check->attributes()->$name)){ return false; }   
   }   
   
   /*当没有子节点时,则检查对象也不能有子节点*/   
   if(count($base->children())==0){   
       return (count($check->children())==0);   
   }   
   
   /*将检查对象的子节点分群*/   
   $checkChilds = array();   
   foreach($check->children() as $name => $child){   
       $checkChilds[$name][] = $child;   
   }   
   
   /*检查子节点*/   
   $checked = array();   
   foreach($base->children() as $name => $baseChild){   
       /*跳过已经检查的子节点*/   
       if(in_array($name, $checked)){ continue; }   
       $checked[] = $name;   
   
       /*检查必要的子节点是否存在*/   
       if(emptyempty($checkChilds[$name])){ return false; }   
   
       foreach ($checkChilds[$name] as $child){   
           /*递回检查子节点*/   
           if( !checkXmlStructure($baseChild, $child) ){ return false; }   
       }   
   }   
   
   return true;   
}   
   
   
/*==============================================================================*/   
   
if(isset($_SERVER['argv'])){   
   parse_str(preg_replace('/&[-]+/','&',join('&',$_SERVER['argv'])), $_GET);   
   
   if(emptyempty($_GET['base_file']) || emptyempty($_GET['check_file'])){   
       echo "Run: ".basename(__FILE__)." base_file=base.xml check_file=check.xmln"; exit(1);   
   }   
   
   exit( checkXmlFileStructure($_GET['base_file'],$_GET['check_file']) ? 0 : 1);   
   
}else{   
   if(emptyempty($_GET['base_file']) || emptyempty($_GET['check_file'])){   
       echo "Run: ".basename(__FILE__)."?base_file=base.xml&check_file=check.xml
"; exit;   
   }   
   
   echo( checkXmlFileStructure($_GET['base_file'],$_GET['check_file']) ? '1' : '0');   
}  

使用方式(shell)

 代码如下 复制代码
php check_xml_file_structure.php base_file=base.xml check_file=check.xml   
   
if [ "j$?" != "j0" ]; then   
   echo "Run Error"   
fi

测试范例 1
base_1.xml

 代码如下 复制代码


  
       Category文字
       Title文字
  

check_1.xml

 代码如下 复制代码
   
   
      
       Category文字   
       Title文字   
  
   
      
       Category文字   
       Title文字   
       Description文字   
  
   

测试范例 2
base_2.xml

 代码如下 复制代码
   
   
      

check_2.xml

 代码如下 复制代码


      
      
      
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