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# DomDocument->dump_mem

(no version information, might be only in CVS)

DomDocument->dump_mem -- Dumps the internal XML tree back into a string

## 说明

string DomDocument->dump_mem ( [bool format [, string encoding]] )

警告
本函数是实验性的。本函数的行为，包括函数名称以及其它任何关于本函数的文档可能会在没有通知的情况下随 PHP 以后的发布而改变。使用本函数风险自担。

Creates an XML document from the dom representation. This function usually is called after building a new dom document from scratch as in the example below. The format specifies whether the output should be neatly formatted, or not.

例子 1. Creating a simple HTML document header

`<?php
$doc = domxml_new_doc("1.0");
$root = $doc->create_element("HTML");
$root = $doc->append_child($root);
$head = $doc->create_element("HEAD");
$head = $root->append_child($head);
$title = $doc->create_element("TITLE");
$title = $head->append_child($title);
$text = $doc->create_text_node("This is the title");
$text = $title->append_child($text);
echo "<PRE>";
echo htmlentities($doc->dump_mem(true));
echo "</PRE>";
?>`

> 注: The first parameter was added in PHP 4.3.0.

See also domdocument_dump_file(), and domdocument_html_dump_mem().

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