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                            # PHP asXML() 函數



## 定義和用法

asXML() 函數以字符串的形式從 SimpleXMLElement 對象返回 XML 文檔。

若失敗，則返回 false。

### 語法

```
class SimpleXMLElement
{
string asXML(file)
}
```

| 參數 | 描述 |
| --- | --- |
| file | 可選。如果規定了此參數，則該函數會把 XML 寫入一個文件，而不是返回它。 |

## 例子

XML 文件：

```
<?xml version="1.0" encoding="ISO-8859-1"?>
<note>
<to>George</to>
<from>John</from>
<heading>Reminder</heading>
<body>Don't forget the meeting!</body>
</note>
```

PHP 代碼：

```
<?php
if (file_exists('test.xml'))
  {
  $xml = simplexml_load_file('test.xml');
  }

echo $xml->asXML();
?>
```

輸出：

```
George John Reminder Don't forget the meeting!
```

如果在瀏覽器窗口中選擇“查看源文件”，會看到這些 HTML：

```
<note>
<to>George</to>
<from>John</from>
<heading>Reminder</heading>
<body>Don't forget the meeting!</body>
</note>
```




                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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