NOTE: $enable can be integer as in example, or boolean.
(PHP 5 >= 5.1.2, PHP 7, PHP 8, PECL xmlwriter >= 0.1.0)
XMLWriter::setIndent -- xmlwriter_set_indent — Toggle indentation on/off
面向对象风格
过程化风格
Toggles indentation on or off.
xmlwriter仅用于过程调用。被修改的 XMLWriter 实例对象。此资源来自于对 xmlwriter_open_uri() 或 xmlwriter_open_memory() 的调用。
enableWhether indentation is enabled.
示例 #1 XMLWriter::setIndent() and mixed Content
Enabling indentation is not suitable for mixed content, because the indent string is also inserted before inline elements.
<?php
$writer = new XMLWriter();
$writer->openMemory();
$writer->setIndent(2);
$writer->startDocument();
$writer->startElement('p');
$writer->text('before');
$writer->writeElement('a', 'element');
$writer->text('after');
$writer->endElement();
$writer->endDocument();
echo $writer->outputMemory();
?>以上示例会输出：
<?xml version="1.0"?> <p>before <a>element</a> after</p>
注意:
The indent is reset when an xmlwriter is opened.