removing a blank line in txt file with php

Hi,

I made this super simple (learning) php script to subscribe to an e-mail list, send the mails with a webbased textfield and that works all ok. The problem is unsubscribing.

In the mail is a link like this: http://wwww.somhost.com/[email protected]

I made a form where the initial value is that email, when they press the submit button it posts it to this script:
(Ihave 1 e-mail per line)

PHP Code:

---

$T1 = $_POST['T1']; 

$splitmails = file("themails.dat");
$tn = 0;
for ($i = 0; $i < count($splitmails); $i++) { 

$deleteadres = $splitmails[$tn];
$tn++;

$deleteadres = str_replace("$T1", "", $deleteadres);

$fp .= $deleteadres;
}

$a = fopen("themails.dat", "w"); 
fputs($a, "$fp");
fclose($a);
?> 


---

This leaves a blank line where the unsubscribed e-mail was. Is there any way to remove that blank line too?

Thanks :)

Hi,

the possible problem with your script:
if [email protected] and [email protected] are both subscribed, it will even leave a plain u

Consider this snippet

Code:

---

$newlist = array();
for($n = 0 ; $n < count($splitmails ; $n++)
  if(!eregi("^$T1", $splitmails[$n]))
    $newlist[] = $splitmails[$n];

---

Of course you want to save the $newlist this time.
If there is ever a chance that two people unsubscribe at the same time, you would have to replace your file handling

Musicman

Never thought of that, but it could well be possible indeed.
To get thing clear, eregi checks if it is that precise email and takes out the email that is equal to $T1 ?

Then i would write that array to the textfile again like this(?)

PHP Code:

---

<?
$T1 = $_POST['T1']; 

$splitmails = file("themails.dat");

$newlist = array();

$tn = 0;
for($n = 0 ; $n < count($splitmails ; $n++){
  if(!eregi("^$T1", $splitmails[$n]))
     $newlist[] = $splitmails[$n];

// I think this adds it to $fp
$fp .= $newlist[$tn] . "\n";
// add a new line?
$tn++
}

$a = fopen("themails.dat", "w"); 
fputs($a, "$fp");
fclose($a);
?>

---

If two people run this script the same time, would that mean it could mess up 'themails.dat'? I was hoping PHP would handle that for me (processing one after another).

Is there a way to script around this (without using a db)?

Thanks for your suggestions and help :)