search
HomeBackend DevelopmentPHP Tutorialphp中simplexml_load_file函数用法实例_PHP

本文实例讲述了php中simplexml_load_file函数用法。分享给大家供大家参考。具体用法分析如下:

在php中simplexml_load_file() 函数把 XML 文档载入对象中之后我们就可以利用由此函数返回的对象进行相关的操作了,下面我们看几个测试实例.

例子,XML文件代码如下:

代码如下:

 

George
John
Reminder
Don't forget the meeting!


PHP 代码如下:

代码如下:

if (file_exists('test.xml')) 

  $xml = simplexml_load_file('test.xml'); 
  var_dump($xml); 

else 

  exit('Error.'); 

?>


 
运行输出结果如下: 

代码如下:


object(SimpleXMLElement)#1 (4) {
  ["to"]=>
  string(6) "George"
  ["from"]=>
  string(4) "John"
  ["heading"]=>
  string(8) "Reminder"
  ["body"]=>
  string(25) "Don't forget the meeting!"
}


假如有一个“iciba.xml”文件,其内容如下:

代码如下:

 
 
 天空 
  
 Array;Array; 
  
  The church tower stood against the sky like a finger pointing towards heaven. 
  教堂的尖塔在天空的映衬下宛如指向天空的手指。 
 
 
  
  A balloon floated across the sky. 
  气球飘过天空。 
 
 
  
  A bolt of lightning lit up the sky. 
  (一道)闪电照亮了天空。 
 
 
  
  A bright moving object appeared in the sky at sunset. 
  日落西山时,天空出现了一个移动的发亮物体。 
 
 
  
  A bright rainbow arched above. 
  一弯明亮的彩虹悬挂在天空。 
 
 


在PHP语言中我们可以用以下方法取得我们想要的值: 

代码如下:

$xmldata = simplexml_load_file("iciba.xml"); 
 
header("Content-Type: text/html; charset=UTF-8"); 
print_r($xmldata); //第一部分 
 
$listcount = count($xmldata->sent); 
 
for($i=0;$i  $dictlist = $xmldata->sent[$i]; 
 echo "
例句:".$dictlist->orig; 
 echo "
翻译:".$dictlist->trans; 

?>

“第一部分”将输出: 

代码如下:


SimpleXMLElement Object
(
    [@attributes] => Array
        (
            [num] => 219
            [id] => 219
            [name] => 219
        )

    [key] => 天空
    [pos] => SimpleXMLElement Object
        (
        )

    [acceptation] => Array;Array;
    [sent] => Array
        (
            [0] => SimpleXMLElement Object
                (
                    [orig] => The church tower stood against the sky like a finger pointing towards heaven.
                    [trans] => 教堂的尖塔在天空的映衬下宛如指向天空的手指。
                )

            [1] => SimpleXMLElement Object
                (
                    [orig] => A balloon floated across the sky.
                    [trans] => 气球飘过天空。
                )

            [2] => SimpleXMLElement Object
                (
                    [orig] => A bolt of lightning lit up the sky.
                    [trans] => (一道)闪电照亮了天空。
                )

            [3] => SimpleXMLElement Object
                (
                    [orig] => A bright moving object appeared in the sky at sunset.
                    [trans] => 日落西山时,天空出现了一个移动的发亮物体。
                )

            [4] => SimpleXMLElement Object
                (
                    [orig] => A bright rainbow arched above.
                    [trans] => 一弯明亮的彩虹悬挂在天空。
                )

        )

)

“第二部分”将输出: 

代码如下:


例句:The church tower stood against the sky like a finger pointing towards heaven.
翻译:教堂的尖塔在天空的映衬下宛如指向天空的手指。
例句:A balloon floated across the sky.
翻译:气球飘过天空。
例句:A bolt of lightning lit up the sky.
翻译:(一道)闪电照亮了天空。
例句:A bright moving object appeared in the sky at sunset.
翻译:日落西山时,天空出现了一个移动的发亮物体。
例句:A bright rainbow arched above.
翻译:一弯明亮的彩虹悬挂在天空。

例子,更深入的一个遍历输出生成表格,代码如下:

代码如下:

eader("content-type:text/html; charset=utf-8"); //设置编码 
$xml = simplexml_load_file('a.xml'); //载入xml文件 $lists和xml文件的根节点是一样的 
echo $xml->company."
"; 
echo $xml->town."
id:"; 
echo $xml->town['id']."
parent:"; 
echo $xml->town['parent']."
"; 
 
echo "
循环读取:
"; 
foreach($xml->user as $users){ //有多个user,取得的是数组,循环输出 
    echo "-------------------
"; 
    echo "姓名:".$users->name."
"; 
    echo "编号:".$users->age."
"; 
    echo "性别:".$users->age['sex']."
"; 
    echo "序号:".$users->height."
"; 
}
 
echo "
循环读取:
"; 
foreach($xml->town as $towns){ //有多个user,取得的是数组,循环输出 
    echo "-------------------
"; 
    echo "id:".$towns['id']."
"; 
    echo "归属:".$towns['parent']."
"; 
    echo "地区:".$towns."
"; 
}

希望本文所述对大家的PHP程序设计有所帮助。

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
How can you check if a PHP session has already started?How can you check if a PHP session has already started?Apr 30, 2025 am 12:20 AM

In PHP, you can use session_status() or session_id() to check whether the session has started. 1) Use the session_status() function. If PHP_SESSION_ACTIVE is returned, the session has been started. 2) Use the session_id() function, if a non-empty string is returned, the session has been started. Both methods can effectively check the session state, and choosing which method to use depends on the PHP version and personal preferences.

Describe a scenario where using sessions is essential in a web application.Describe a scenario where using sessions is essential in a web application.Apr 30, 2025 am 12:16 AM

Sessionsarevitalinwebapplications,especiallyfore-commerceplatforms.Theymaintainuserdataacrossrequests,crucialforshoppingcarts,authentication,andpersonalization.InFlask,sessionscanbeimplementedusingsimplecodetomanageuserloginsanddatapersistence.

How can you manage concurrent session access in PHP?How can you manage concurrent session access in PHP?Apr 30, 2025 am 12:11 AM

Managing concurrent session access in PHP can be done by the following methods: 1. Use the database to store session data, 2. Use Redis or Memcached, 3. Implement a session locking strategy. These methods help ensure data consistency and improve concurrency performance.

What are the limitations of using PHP sessions?What are the limitations of using PHP sessions?Apr 30, 2025 am 12:04 AM

PHPsessionshaveseverallimitations:1)Storageconstraintscanleadtoperformanceissues;2)Securityvulnerabilitieslikesessionfixationattacksexist;3)Scalabilityischallengingduetoserver-specificstorage;4)Sessionexpirationmanagementcanbeproblematic;5)Datapersis

Explain how load balancing affects session management and how to address it.Explain how load balancing affects session management and how to address it.Apr 29, 2025 am 12:42 AM

Load balancing affects session management, but can be resolved with session replication, session stickiness, and centralized session storage. 1. Session Replication Copy session data between servers. 2. Session stickiness directs user requests to the same server. 3. Centralized session storage uses independent servers such as Redis to store session data to ensure data sharing.

Explain the concept of session locking.Explain the concept of session locking.Apr 29, 2025 am 12:39 AM

Sessionlockingisatechniqueusedtoensureauser'ssessionremainsexclusivetooneuseratatime.Itiscrucialforpreventingdatacorruptionandsecuritybreachesinmulti-userapplications.Sessionlockingisimplementedusingserver-sidelockingmechanisms,suchasReentrantLockinJ

Are there any alternatives to PHP sessions?Are there any alternatives to PHP sessions?Apr 29, 2025 am 12:36 AM

Alternatives to PHP sessions include Cookies, Token-based Authentication, Database-based Sessions, and Redis/Memcached. 1.Cookies manage sessions by storing data on the client, which is simple but low in security. 2.Token-based Authentication uses tokens to verify users, which is highly secure but requires additional logic. 3.Database-basedSessions stores data in the database, which has good scalability but may affect performance. 4. Redis/Memcached uses distributed cache to improve performance and scalability, but requires additional matching

Define the term 'session hijacking' in the context of PHP.Define the term 'session hijacking' in the context of PHP.Apr 29, 2025 am 12:33 AM

Sessionhijacking refers to an attacker impersonating a user by obtaining the user's sessionID. Prevention methods include: 1) encrypting communication using HTTPS; 2) verifying the source of the sessionID; 3) using a secure sessionID generation algorithm; 4) regularly updating the sessionID.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools