Fetch URL and replace in HTML form

Anon

Hi folks,

I am trying to administer several web sites from a makeshift server. This in and of itself is not a problem except that my ISP will not grant me a static IP address. Can anyone throw me a bone and give me some suggestions as to how I might write a simple PHP code that can automatically replace URL redirects in external forms and pages where the URL is directed back to my numeric server IP.

For example:

I have a PHP run HTML form that exists on a an outside server (not mine) and PHP script that operates the form resides on my server. So I simply wrote the form to POST using FORM ACTION = http://myserver

Is there some way I can script this so that instead of having to upload a revised form every time my IP changes I can have the FORM ACTION fetch the latest IP link address from another stable external server?

Any hlep would be much appreciated.

matto

I thought about that ...

I would try this:
on the server of which you need to know the IP, place a script containing a function that reads out and returns the server's IP using getenv("SERVER_ADDR"); (I hope this always returns the IP and not the server name depending on something ...)

include that script and call the function in the form script on the other server, now include the IP in your form action value.

I haven't tried this out except the getenv part, but I would start trying this.

Anon

Thanks for the suggestions. with some minor adjustments I was able to get most of it running. The scriot I used was as follows:
<?PHP
//This portion of the script reads out and returns the server's IP using //getenv("SERVER_NAME");
//This is the line that gives you the updated IP address as long as you change it in the apache config every time a change comes through
//The change in Apache is necessary because the pseudo-server operates from behind a router and the getenv() function only reads back the local IP
$display = getenv("SERVER_NAME");
getenv("SERVER_NAME");
//This portion of the script writes the IP change to a data file
$IP = "IP.dat";
$fp = fopen($IP, "r");
$IPChange = $display;
$IPchange = (int) fread($fp, 20);
fclose($fp);
$IPChange++;
$fp = fopen($IP, "w");
fwrite($fp, $IPChange);
fclose($fp);
//This line echos back the changed IP address
echo ("$display");
//I could then have the script upload the .dat or .txt file containg the new IP address to a stable external server
$fp = fopen("ftp://ExternalServer/IP.dat", "w");
fwrite($fp, "$IPChange");
fclose($fp);
//Then include that script and call the function in the form script on the other //server
//Now this sounds easy enough, but the problem is that the external server is //not running PHP!!!!
?>

So I am thinking that I should simply change the script so that is creates a HTML header file (instead of a .dat file) that is uniform on all the external pages and then have the script ftp the changed header file to all the external pages. But this seems rather redundant.

Any suggestions?