how to stop duplicate values from being written to text file using php

Question

i have a script that keeps reloading every 2 seconds, i made a code to create a txt file for each user IP and write the user name $name inside it. my problem is that everytime my script reloads it will write the $name of the specific IP again with every reload. the code is

 $ip_file = "ips/".$ip.".txt";

    $logip = fopen($ip_file,"a", 1);

    $name = $name."\n";

    fwrite($logip, $name);  

    fclose($logip);

    return;

i need some way to verify if the name is already in the $ip_file and if it's there then not to write it again.

the idea behind this is to check if the same IP is used by more than one $name and then create a function to check all the $ip_file files for more than 1 $name and if so ban the violating $ip

thanks in advance

FuzzyTree · Accepted Answer · 2014-11-02 01:54:48Z

3

$ip_file = "ips/".$ip.".txt";
$names = file_get_contents($ip_file); //read names into string
if(false === strpos($names,$name)) { //write name if it's not there already
    file_put_contents($ip_file,"$name\n",FILE_APPEND);
}

edited Nov 2, 2014 at 1:54

answered Nov 2, 2014 at 1:14

FuzzyTree

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5 Comments

Leandro Bardelli Over a year ago

+1 that's better than my answer, I couldn't understand the main idea

GuestofHonor Over a year ago

thanks a lot, that worked exactly the way i want it to :) i think i will now need a way using preg_split to check if file has more than one name to perform a function

GuestofHonor Over a year ago

how can i add a code to check if more than 1 $name is in $ip_file to execute another command ? thanks in advance

FuzzyTree Over a year ago

@GuestofHonor if(count(file($ip_file)) > 1)

GuestofHonor Over a year ago

@FuzzyTree, that command didn't work, as it banned all my users :) command counted $ip_file and not the $name inside the file :)

Leandro Bardelli · Accepted Answer · 2014-11-02 01:11:52Z

1

Is this what you need?

<?php
$ip_file = "ips/".$ip.".txt";
$name = $name."\n";

if (file_exists($ip_file)) {

    $valueInFile = file_get_contents($ip_file, true);

    if ($valueInFile == $name) {
       //Do something
    }
} else {
    $logip = fopen($ip_file,"a", 1);
    fwrite($logip, $name);  
    fclose($logip);
}
return;
?>

From: http://php.net/manual/en/function.file-exists.php

edited Nov 2, 2014 at 1:11

answered Nov 2, 2014 at 1:02

Leandro Bardelli

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3 Comments

Jens A. Koch Over a year ago

This answer is not related to duplicate values.

GuestofHonor Over a year ago

i'm already writing that filename.txt so i know it exists, i need to verify the data inside it

Leandro Bardelli Over a year ago

oh sorry, then maybe the "a" parameter? Is not from append?

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