XMLWriter::startAttributeNs()函数是PHP中的一个内置函数,用于启动命名空间属性。稍后可以使用XMLWriter::endAttribute()函数关闭此属性。通常,网页样式无法在命名空间属性中使用。
用法:
bool XMLWriter::startAttributeNs( string $prefix, string $name, string $uri )
参数:此函数接受上述和以下所述的三个参数:
- $prefix:它指定名称空间的前缀。
- $name:它指定名称空间的名称。
- $uri:它指定名称空间的值。
返回值:如果成功,此函数将返回TRUE,否则将返回FALSE。
以下示例说明了PHP中的XMLWriter::startAttributeNs()函数:
范例1:
<?php
// Create a new XMLWriter instance
$writer = new XMLWriter();
// Create the output stream as PHP
$writer->openURI('php://output');
// Start the document
$writer->startDocument('1.0', 'UTF-8');
// Start a element
$writer->startElement('div');
// Start the namespaced attribute
$writer->startAttributeNs('pre', 'attrib', 'value');
// Add value to the attribute
$writer->text('value');
// End the attribute
$writer->endAttribute();
// End the element
$writer->endElement();
// End the document
$writer->endDocument();
?>
输出:
<?xml version="1.0" encoding="UTF-8"?> <div pre:attrib="value" xmlns:pre="value"/>
范例2:
<?php
// Create a new XMLWriter instance
$writer = new XMLWriter();
// Create the output stream as PHP
$writer->openURI('php://output');
// Start the document
$writer->startDocument('1.0', 'UTF-8');
// Start a element
$writer->startElement('div');
// Start the namespaced attribute with style attribute
// This will not work because it is namespaced
$writer->startAttributeNs('style', 'attrib', 'value');
// Add value to the attribute
$writer->text('color:blue');
// End the attribute
$writer->endAttribute();
// Add value to the element
$writer->text('Namespaced GeeksforGeeks');
// End the element
$writer->endElement();
// Start a h1 element
$writer->startElement('h1');
// Start the style attribute
$writer->startAttribute('style');
// Add value to the attribute
$writer->text('color:green');
// End the attribute
$writer->endAttribute();
// Add value to the element
$writer->text('Normal GeeksforGeeks');
// End the element
$writer->endElement();
// End the document
$writer->endDocument();
?>
输出:
参考: https://www.php.net/manual/en/function.xmlwriter-start-attribute-ns.php
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注:本文由纯净天空筛选整理自gurrrung大神的英文原创作品 PHP | XMLWriter startAttributeNs() Function。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。