Display IMAGE OR DATA through external TXT File - php

Question

I have file1.txt and A PHP Code which increment it.
I have a snippet to display the image.
I paste a snippet in my website that displays Images by reading the data number from file1.txt.
I use the snippet multiple times in one page but I get the same result. What happens is that when the website page is loaded it reads the file1.txt having ,lets say number 10, image number.
What I want is that Snippet 1 Displays 10 Increment file1.txt
then Snippet 2 Displays 11 and so on.
how should i make the snippet in such a way that it waits for the increment and then reads it and then it displays image.
Example:
Snippet 1 >10th Image
Snippet 2 >11th Image
Snippet 3 >12th Image
While all are executed in one page?
One Way i Think might be that the snippet GET the wait.txt and
checks if its 1 or 0 If It is 1 it waits for certain seconds then
execute the external php and if it is 0 it proceeds to executes the
external PHP. Then External PHP on Execution Sets wait.txt to
1 while its being used and then once it has finished it sets the
wait.txt to 0
But I doubt it will flawlessly work. I need you guys to help me out.
Okay the below code is what I have
The PHP Contains this:
$open = fopen("xml/file1.txt", "r+");
$num = fgets($open);
$close = fclose($open);
$num++;
$open = fopen("xml/file1.txt", "w+");
fwrite($open, $num);
$close = fclose($open);
The Snippet
<?php
$myFile = "../xml/file1.txt";
$line= file($myFile);//file in to an array
$image = $line[0]; //So that it Reads the first line if 2nd line has /n
echo "<img src=''.$image.'.img'></img>";
/*Executing PHP through php as it as additional code in php
which does some other verifications.*/
echo '<script src="//localhost/image.php"></script>';
?>
The file1.txt Contains:
1
//Ignore the comment here it just contain 1 number
//which increment each time the snippet executes the php
So I paste The snippet in one page Multiple times. But All snippet displays the same image instead of in ascending order. I want to find how can I do it? No MySql Database. And I don't want to list and read each line.
I want my snippet to read the data from file1.txt after it has been
updated
I want my snippet to know that the php is busy and needs to wait while other snippet is using it. As my project will include heavy traffic I want it Optimized.
Lastly I am a new to this so it's hard to figure out.
THE CODE BELOW WORKS BUT HOW CAN I OPTIMISE IT for heavy traffic?
<?php
session_start();
waitque();
function waitque() {
$input = $_SERVER['HTTP_HOST'];
$e = $_SERVER['REQUEST_URI'];
$ip = $_SERVER['REMOTE_ADDR'];
$input = trim($input, '/');
// If not have http:// or https:// then prepend it
if (!preg_match('#^http(s)?://#', $input)) {
$input = 'http://' . $input;
}
$urlParts = parse_url($input);
// Remove www.
$dom = preg_replace('/^www\./', '', $urlParts['host']);
if(isset($_SESSION['worker'])){
$open = fopen("queue/imageindex.txt", "r+");
$value = fgets($open);
$close = fclose($open);
$value++;
$open = fopen("queue/imageindex.txt", "w+");
fwrite($open, $value); // variable is not restated, bug fixed.
$close = fclose($open);
$myFile = "queue/imageindex.txt";
$line= file($myFile);//file in to an array
$relid = $line[0];
echo $relid." Code PUBLISHED</div>";
unset($_SESSION['worker']);
} else {
echo "<div>waiting...</div>";
$_SESSION['worker']= $dom.$a.$ip;
waitque();
}
}
?>