调试php的时候 最简单的echo不输出
<html><br /><body><br /><br /><form action="./welcome_get.php" method="post"><br />Name: <input type="text" name="name"><br><br />E-mail: <input type="text" name="email"><br><br /><input type="submit"><br /></form><br /><br /></body><br /></html>
<html><br /><body><br /><br />Welcome <?php echo test; ?><br><br />Your email address is: <?php echo $_POST["email"]; ?><br /> <br /><br /></body><br /></html>
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