用Php读取XML最简单的情况:
XML文件(cy.xml)如下:
- 1
- 2
- 3
Php文件(cy.php)如下:
$xml = new DOMDocument();
$xml->load('cy.xml');
foreach($xml->getElementsByTagName('list') as $list)
{
$value = $list->firstChild->nodeValue;
echo $value.”
”;
}
?>
cy.php的运行结果:
1
2
3
=============
用Php读取XML稍微复杂一点的情况:
cy.xml如下:
- 1
- 2
- 3
cy.php如下(和第一种情况没有任何变化):
$xml = new DOMDocument();
$xml->load('cy.xml');
foreach($xml->getElementsByTagName('list') as $list)
{
$value = $list->firstChild->nodeValue;
echo $value.”
”;
}
?>
cy.php的运行结果和第一次也相同:
1
2
3
Php读取XML第三种情况:
XML文件(cy.xml)如下:
- 1
- 2
- 3
- 4
- 5
- 6
Php文件(cy.php)如下(和第一次依然没有变化):
$xml = new DOMDocument();
$xml->load('cy.xml');
foreach($xml->getElementsByTagName('list') as $list)
{
$value = $list->firstChild->nodeValue;
echo $value.”
”;
}
?>
cy.php的输出结果:
1
2
3
4
5
6
===========
Php读取XML第四种情况,保持cy.xml不变,改变cy.php:
XML文件(cy.xml)如下:
- 1
- 2
- 3
- 4
- 5
- 6
Php文件(cy.php)如下:
$xml = new DOMDocument();
$xml->load('cy.xml');
$main = $xml->getElementsByTagName('main');
foreach( $main as $main)
{
$list = $main->getElementsByTagName( “list” );
foreach ( $list as $list )
{
$value = $list->firstChild->nodeValue;
echo $value.”
”;
}
}
?>
cy.php输出结果:
1
2
3
4
5
6
为什么两次的cy.php不同,但输出结果是相同的?让我们来看下一个例子
==============
Php读取XML第五种情况,改变cy.xml,使cy.php保持第四种情况:
XML文件(cy.xml)如下:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
Php文件(cy.php)和第四种情况相同:
$xml = new DOMDocument();
$xml->load('cy.xml');
$main = $xml->getElementsByTagName('main');
foreach( $main as $main)
{
$list = $main->getElementsByTagName( “list” );
foreach ( $list as $list )
{
$value = $list->firstChild->nodeValue;
echo $value.”
”;
}
}
?>
cy.php输出结果为:
1
2
3
4
5
6
为什么
- 7
- 8
- 9
中的7,8,9没有被读出来?
因为我们的cy.php只读取标记中的内容.
我们这里所提到的”标记”,在XML里被称做”节点”;
关于”节点”的相关概念,我们将在以后说明.
Php读取XML情况六,再foreach一次,我们把7,8,9读出来!:
XML文件(cy.xm)如下:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
Php文件(cy.php)如下:
$xml = new DOMDocument();
$xml->load('cy.xml');
$main = $xml->getElementsByTagName('main');
foreach( $main as $main)
{
$list = $main->getElementsByTagName( “list” );
foreach ( $list as $list )
{
$value = $list->firstChild->nodeValue;
echo $value.”
”;
}
}
$m = $xml->getElementsByTagName('m');
foreach( $m as $m)
{
$list = $m->getElementsByTagName( “list” );
foreach ( $list as $list )
{
$value = $list->firstChild->nodeValue;
echo $value.”
”;
}
}
?>
cy.php输出结果:
1
2
3
4
5
6
7
8
9
===============
Php读取XML情况七,cy.xml变得更复杂一些:
XML文件(cy.xml)如下:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
那么,我们如何只读出内
Php文件(cy.php)如下:
$xml = new DOMDocument();
$xml->load('cy.xml');
$main = $xml->getElementsByTagName('main');
foreach( $main as $main)
{
$list = $main->getElementsByTagName( “list” );
foreach ( $list as $list )
{
$value = $list->firstChild->nodeValue;
echo $value.”
”;
}
$title = $main->getElementsByTagName( “title” );
foreach ( $title as $title )
{
$value = $title->firstChild->nodeValue;
echo $value.”
”;
}
}
$m = $xml->getElementsByTagName('m');
foreach( $m as $m)
{
$list = $m->getElementsByTagName( “list” );
foreach ( $list as $list )
{
$value = $list->firstChild->nodeValue;
echo $value.”
”;
}
}
?>
cy.php输出结果:
1
2
3
a
4
5
6
7
8
9
想一下,如何读出
Php读取XML再通过一个例子巩固一下:
XML文件(cy.xml)如下:
Php文件(cy.php)如下:
$xml = new DOMDocument(); //建立一个DOMDocument
$xml->load('cy.xml'); //Php指定需要读取xml文件的位置
$LevelOne = $xml->getElementsByTagName('LevelOne');//按照名称取得节点,返回所有节点的集合,不过这里这样读LevelOne是没有意义的….
$LevelOne = $xml->getElementsByTagName('LevelOne')->item(0);//返回第一个LevelOne节点中的内容
$LevelTwo = $LevelOne->getElementsByTagName('LevelTwo'); //按照名称取得节点,返回所有LevelTwo
foreach ( $LevelTwo as $Content )//循环读出所有LevelTwo,并在循环里,把LevelTwo用Content表示
{
$LevelThree = $Content->getElementsByTagName('LevelThree');//返回所有LevelThree
foreach ( $LevelThree as $Concert )
{
$name = $Concert->nodeName;//节点名称
$value = $Concert->nodeValue;//节点值
$id = $Concert->getAttribute('id');//”id”属性值
echo $name.”
”;
echo $value.”
”;
echo $id.”
”;
}
}
?>
如果用$LevelOne = $xml->getElementsByTagName('LevelOne')这样的方式取得节点,那么,读取里面的内容,需要用foreach 循环,因为$LevelOne = $xml->getElementsByTagName ('LevelOne')返回的,是一个集合,并不是一个具体的节点—-仅管叫做LevelOne的节点只有一个….
如果用$LevelOne = $xml->getElementsByTagName('LevelOne')->item(0)这样的方式取得节点,那么读取里面的内 容,可以直接$LevelOne->xxxxxx,因为这样返回的是一个具体的节点。
现在提供一种很简便的方法用PHP读取XML:
XML文件(cy.xml)如下:
Php文件(cy.php)如下:
$xml = simplexml_load_file('sxml.xml');
$part = $xml->site->part;
foreach ( $part as $content )
{
echo $content['id'].”
”;
echo $content->title.”
”;
echo $content->title['id'].”
”;
echo $content->describe.”
”;
}
?>
cy.php输出结果:
1
czbin xml版块
a
xml的相关文章
2
czbin php版块
php的相关文章
3
czbin ajax版块
c
ajax的相关文章
怎么样?的确很简单吧!

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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