Add and remove data to a list PHP - php

Question

I'm working on an application that uses some saved data to work with it later.
I can't use database so this have to be file based.
The thing works like this:
A file name called hosts.txt that contains host:service on every line (diff hosts and services).
My PHP file reads the txt line by line, splits by the delimiter ":" and makes a request with the data that has just recived.
Untill here, cool. I also have another file (a HTML form) that allows me to add that at the end of the file. But my problem is the next:
I want to be able to add and remove that from the file so when the next check is done (the check is made every 30 sec) the data should be updated.
Example:
host.txt contains this:
host1:service1
host1:service2
host2:service2
host3:service1
Now I want to be able to add a new host:service to the list (I've already done this by adding the new data at the end of the text file then that will be included on the next check when php will read again line by line.
Now now, how can I remove a host:service from the file ?
I mean, after reading the file, the PHP will make something like this:
Host: Host1 | Service: Service1 | Status: Warning (this will depend on the HTTP request I will make) (X)
Host: Host1 | Service: Service2 | Status: OK (X)
Host: Host3 | Service: Service1 | Status: Critical (X)
I want to be able to remove a host:service from the list (and the file) just by clicking that (X). Is this possible guys? I'm a bit lost ( It will be easy for me to work with database but I can't on this project).
I hope I will get something clear.
Thanks in advance,
Regards.

Answer 1

In PHP you want to do something like this:
Code
$string = 'host1:service1
host1:service2
host2:service2
host3:service1';
$splitted = explode("\n", $string);
$data = array();
foreach ($splitted as $key => $value) {
$data[$key] = explode(':', $value);
}
echo '<pre>';
print_r($data);
echo '<pre>';
You now have structured data you can do checks with if certain values match or are specific categories. The control over the output is now fully in your hands.
Output
Array
(
[0] => Array
(
[0] => host1
[1] => service1
)
[1] => Array
(
[0] => host1
[1] => service2
)
[2] => Array
(
[0] => host2
[1] => service2
)
[3] => Array
(
[0] => host3
[1] => service1
)
)
If you still have issues outputting your data, feel free to ask in a comment and I'll update the answer.

Answer 2

Roughly:
1) Do an explode on the enters in the textfile so that you have a numbered array.
2) set an id for each line in the html (integer for each line number)
3) make a jquery function that has a "click" listener
4) create an AJAX script that has the integer as input
5) read the hosts.txt again, remove the line which corresponds with the number (unset($array['linenumber']))
6) implode with enters, write to file (overwriting the old one)
7) reload page (or hide the row)