Brother, I used flex+php+mysql to read data and it showed that there were related problems! How can I change the writing?

I used flex+php+mysql to read data and there was a problem! How can I change the writing? ?
This is the code for BookDAO.php:

<?php

$link = mysql_connect(“localhost”,”***”,”***”);

Mysql_select_db(“book”);

mysql_query(“SET NAMES ‘utf8’ “);

/*Return books in XML format*/

$sql = ‘SELECT * FROM books’;

$result = mysql_query($sql);

echo “”;

echo “\n”;

while($row = mysql_fetch_array($result)){

echo “” .$row[“id”].””;

echo “” .$row[“author”]. “”;

echo “\n”;

echo “” .$row[“genre”]. “\n”;

echo “” .$row[“price”]. “\n”;

echo “” .$row[“publish_date”]. “\n”;

echo “” .$row[“description”]. “\n”;

}

echo “\n”;

Mysql_close($link);
?>

The result displayed in mxml is: Since I can’t put a picture, I simply counted the results:
Hello!
This is the content of the data displayed by the datagrid. The auhtor tag is also displayed on the page, instead of just displaying the content “Hello!” . . .
Looking for a way to write it?

——Solution——————–
htmlspecialchars() Put your XML string in it and print it out. This is because you did not specify the content-type with the Header.

You can directly header(“Content-Type:xml”);, the code behind remains unchanged, and the browser can still print out tagged XML.