XMLWriter::startAttributeNs()函數是PHP中的一個內置函數,用於啟動命名空間屬性。稍後可以使用XMLWriter::endAttribute()函數關閉此屬性。通常,網頁樣式無法在命名空間屬性中使用。
用法:
bool XMLWriter::startAttributeNs( string $prefix, string $name, string $uri )
參數:此函數接受上述和以下所述的三個參數:
- $prefix:它指定名稱空間的前綴。
- $name:它指定名稱空間的名稱。
- $uri:它指定名稱空間的值。
返回值:如果成功,此函數將返回TRUE,否則將返回FALSE。
以下示例說明了PHP中的XMLWriter::startAttributeNs()函數:
範例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();
?>
輸出:
<?xml version="1.0" encoding="UTF-8"?> <div pre:attrib="value" xmlns:pre="value"/>
範例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();
?>
輸出:
參考: https://www.php.net/manual/en/function.xmlwriter-start-attribute-ns.php
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