PHP Parse error: syntax error, unexpected T_ENCAPSED_AND_WH_PHP教程

At the beginning of the program, the error encountered was:

PHP Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or T_VARIABLE or T_NUM_STRING in /var/www/developer/pp1/8-22.php tutorial on line 5, referer: http://localhost/developer/pp1 /form_input.html, I checked it online and it was said to be a syntax error. I checked the syntax and found that the echo statement in the last line of group 8-22.php is correct. It should be changed to:

echo"The product will arrive within three days".$_GET['address']."

";

The other 8-22.php code is:

echo $_GET['company']."Hello:

";
echo "Thank you for ordering our products".$_GET['amount'].",";
echo "Total payment".($_GET['amount']*100)."Yuanzheng.

";
echo"The product will arrive within three days$_GET['address']

";
?>

html code