Looping to a link with php script

[jlgray48]

I am trying to create a basic program for a college class that basically does the following.

 

1.) create a form asking for a password

2.) pass the password to a php script

3.) the php script contains an array of valid passwords

4.) compare the password entered to the passwords in the array

5.) print the password is valid or invalid depending on input

 

I've been successful with this part the next part is where I need help

 

6.) If the password is invalid display the form again

 

 

I have no idea how to link to the password form from the php script if the password is invalid

 

FYI this is an intro class so it has to be "basic" programming.

 

Thanks

[bwochinski]

Put it all in one file, with the PHP above the HTML form.  Have the form like: <form method="POST">.  Around your PHP add a check for  $_POST['submit'] being set, so you know if the form has been submitted, and then do your checking.  If the password is wrong, then just set an error message and let the page display again.  If it's right, then redirect to a "success" page.

[boo_lolly]

this is the way i'd do it:

<?php
        if(!isset($_POST['password'])){
                echo "<form action=\"\" method=\"post\">\n";
                echo "<input type=\"text\" name=\"password\">\n";
                echo "<input type=\"submit\" value=\"Submit\">\n";
                echo "</form>\n";
        }else{
                /*set password array*/
                $valid = array("password1", "password2", "password3", "password4");

                /*set valid password confirm variable*/
                $bool = NULL;

                /*upon form submit process password*/
                foreach($valid as $password){
                        if($_POST['password'] == $password){
                                $msg = "<div align=\"center\"><font color=\"AAAA00\">Password is valid.</font></div><br />\n";
                                $bool = true;
                        }
                }
                if($bool != true){
                        echo "<div align=\"center\"><font color=\"FF0000\">Password is not valid. Please try again.</font></div><br />\n";
                        echo "<form action=\"\" method=\"post\">\n";
                        echo "<input type=\"text\" name=\"password\">\n";
                        echo "<input type=\"submit\" value=\"Submit\">\n";
                        echo "</form>\n";
                }else{
                        echo $msg;
                }
                unset($_POST);
        }