PHP script to remove e-mail addresses from a comma-separated list [closed]

Answer 1

This answer was originally appended to the question body by the OP.

First I moved the form to /cancel.html and used

.

(Where I have written .html, it is just to demonstrate, as my server is configured to use no page extentions and also so that PHP is parsed on .html pages.)

Then I put the PHP code into the page /cancel_submit.html and moved

if ($str1 > $str2) {
    echo ("You Have Successfully Unsubscribed From Our Newsletter....
You Will Not Receive Any More Emails From Us.");
} else {
    echo ("The Email Address You Specified Is Not In Our Mailing List.");
}

to another set of PHP brackets.

This meant that the e-mail affffdress was sent via POST to the other page, which then performed the actual removal of the e-mail address from the list and then checked to see if an address been removed to provide the comfirmation message.

I also added two commas to $oldword = "$email"; to make it $oldword = ",$email,"; so that it only finds the text entered into the e-mail box if it has a comma on either side. This addresses the case where someone submits half of an e-mail address.

I also changed $newWord = ""; to $newWord = ","; so that if the script removes an e-mail address with commas at each side, the two e-mail addresses that were next to it will not be separated by a comma.

Here is the code I have for both pages now:

1. cancel.html

   To cancel our Newsletter please enter your email address below....
   
   
   Email Address: 
   
   
   

2. cancel_submit.html

   
    $str2) {
           echo ("You Have Successfully Unsubscribed From Our Newsletter....
   You Will Not Receive Any More Emails From Us.");
       } else {
           echo ("The Email Address You Specified Is Not In Our Mailing List.");
       }
   ?>
   
       
   Please wait to be re-directed or CLICK HERE.
       
   

EDIT:

I made a few improvements. I added:

$email = strtolower($email);

to both the e-mail add script and the e-mail remove script. This converted all characters entered into either form to lowercase; previously, it wouldnt remove e-mails typed in a different case than the big list had.

This messed up the confirmation message command, so I changed it to

if (str_replace($oldWord , $newWord , $basetext)) {
    echo ("You Have Successfully Unsubscribed From Our Newsletter....
You Will Not Receive Any More Emails From Us.");
} else {
    echo ("The Email Address You Specified Is Not In Our Mailing List.");
}