生成如下XML串
Xml代码
复制代码 代码如下:
方法I.【直接生成字符串】
使用纯粹的PHP代码生成字符串,并把这个字符串写入一个以XML为后缀的文件。这是最原始的生成XML的方法,不过有效!
复制代码 代码如下:
$data_array = array(
array(
'title' => 'title1',
'content' => 'content1',
'pubdate' => '2009-10-11',
),
array(
'title' => 'title2',
'content' => 'content2',
'pubdate' => '2009-11-11',
)
);
$title_size = 1;
$xml = "\n";
$xml .= "
foreach ($data_array as $data) {
$xml .= create_item($data['title'], $title_size, $data['content'], $data['pubdate']);
}
$xml .= "
echo $xml;
// 创建XML单项
function create_item($title_data, $title_size, $content_data, $pubdate_data)
{
$item = "
$item .= "
$item .= "
$item .= "
$item .= "
return $item;
}
?>
方法2:【DomDocument】
使用DomDocument生成XML文件,创建节点使用createElement方法,创建文本内容使用createTextNode方法,添加子节点使用appendChild方法,创建属性使用createAttribute方法
复制代码 代码如下:
$data_array = array(
array(
'title' => 'title1',
'content' => 'content1',
'pubdate' => '2009-10-11',
),
array(
'title' => 'title2',
'content' => 'content2',
'pubdate' => '2009-11-11',
)
);
// 属性数组
$attribute_array = array(
'title' => array(
'size' => 1
)
);
// 创建一个XML文档并设置XML版本和编码。。
$dom=new DomDocument('1.0', 'utf-8');
// 创建根节点
$article = $dom->createElement('article');
$dom->appendchild($article);
foreach ($data_array as $data) {
$item = $dom->createElement('item');
$article->appendchild($item);
create_item($dom, $item, $data, $attribute_array);
}
echo $dom->saveXML();
function create_item($dom, $item, $data, $attribute) {
if (is_array($data)) {
foreach ($data as $key => $val) {
// 创建元素
$$key = $dom->createElement($key);
$item->appendchild($$key);
// 创建元素值
$text = $dom->createTextNode($val);
$$key->appendchild($text);
if (isset($attribute[$key])) {
// 如果此字段存在相关属性需要设置
foreach ($attribute[$key] as $akey => $row) {
// 创建属性节点
$$akey = $dom->createAttribute($akey);
$$key->appendchild($$akey);
// 创建属性值节点
$aval = $dom->createTextNode($row);
$$akey->appendChild($aval);
}
} // end if
}
} // end if
} // end function
?>
方法3:【XMLWriter】
使用XMLWriter类创建XML文件,此方法在PHP 5.1.2后有效。另外,它可以输出多种编码的XML,但是输入只能是utf-8
复制代码 代码如下:
$data_array = array(
array(
'title' => 'title1',
'content' => 'content1',
'pubdate' => '2009-10-11',
),
array(
'title' => 'title2',
'content' => 'content2',
'pubdate' => '2009-11-11',
)
);
// 属性数组
$attribute_array = array(
'title' => array(
'size' => 1
)
);
$xml = new XMLWriter();
$xml->openUri("php://output");
// 输出方式,也可以设置为某个xml文件地址,直接输出成文件
$xml->setIndentString(' ');
$xml->setIndent(true);
$xml->startDocument('1.0', 'utf-8');
// 开始创建文件
// 根结点
$xml->startElement('article');
foreach ($data_array as $data) {
$xml->startElement('item');
if (is_array($data)) {
foreach ($data as $key => $row) {
$xml->startElement($key);
if (isset($attribute_array[$key]) && is_array($attribute_array[$key]))
{
foreach ($attribute_array[$key] as $akey => $aval) {
// 设置属性值
$xml->writeAttribute($akey, $aval);
}
}
$xml->text($row); // 设置内容
$xml->endElement(); // $key
}
}
$xml->endElement(); // item
}
$xml->endElement(); // article
$xml->endDocument();
$xml->flush();
?>
方法4: 【SimpleXML】
使用SimpleXML创建XML文档
复制代码 代码如下:
$data_array = array(
array(
'title' => 'title1',
'content' => 'content1',
'pubdate' => '2009-10-11',
),
array(
'title' => 'title2',
'content' => 'content2',
'pubdate' => '2009-11-11',
)
);
// 属性数组
$attribute_array = array(
'title' => array(
'size' => 1
)
);
$string =
XML;
$xml = simplexml_load_string($string);
foreach ($data_array as $data) {
$item = $xml->addChild('item');
if (is_array($data)) {
foreach ($data as $key => $row) {
$node = $item->addChild($key, $row);
if (isset($attribute_array[$key]) && is_array($attribute_array[$key]))
{
foreach ($attribute_array[$key] as $akey => $aval) {
// 设置属性值
$node->addAttribute($akey, $aval);
}
}
}
}
}
echo $xml->asXML();
?>

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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