php中可以通过$_PHP_SELF变量表示当前页面,下面的代码通过将表单的action设置为$_PHP_SELF变量将表单信息提交到当前页面
<?php if( $_POST["name"] || $_POST["age"] ) { echo "Welcome ". $_POST['name']. "<br />"; echo "You are ". $_POST['age']. " years old."; exit(); } ?> <html> <body> <form action="<?php $_PHP_SELF ?>" method="POST"> Name: <input type="text" name="name" /> Age: <input type="text" name="age" /> <input type="submit" /> </form> </body> </html>