functions.php

<?php
include "config.php";


function generateRandomString($length = 5) {
    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
    $charactersLength = strlen($characters);
    $randomString = '';
    for ($i = 0; $i < $length; $i++) {
        $randomString .= $characters[rand(0, $charactersLength - 1)];
    }
    return $randomString;
  }
  
  function rand_color()
  {
    return "#" . str_pad(dechex(mt_rand(0, 0xffffff)), 6, "0", STR_PAD_LEFT);
  }

  
function remove_exif($in, $out)
{
   $buffer_len = 4096;
   $fd_in = fopen($in, 'rb');
   $fd_out = fopen($out, 'wb');
   while ($buffer = fread($fd_in, $buffer_len)) {
      //  \xFF\xE1\xHH\xLLExif\x00\x00 - Exif
      //  \xFF\xE1\xHH\xLLhttp://      - XMP
      //  \xFF\xE2\xHH\xLLICC_PROFILE  - ICC
      //  \xFF\xED\xHH\xLLPhotoshop    - PH
      while (
         preg_match(
            '/\xFF[\xE1\xE2\xED\xEE](.)(.)(exif|photoshop|http:|icc_profile|adobe)/si',
            $buffer,
            $match,
            PREG_OFFSET_CAPTURE
         )
      ) {
         $len = ord($match[1][0]) * 256 + ord($match[2][0]);
         fwrite($fd_out, substr($buffer, 0, $match[0][1]));
         $filepos = $match[0][1] + 2 + $len - strlen($buffer);
         fseek($fd_in, $filepos, SEEK_CUR);
         $buffer = fread($fd_in, $buffer_len);
      }
      fwrite($fd_out, $buffer, strlen($buffer));
   }
   fclose($fd_out);
   fclose($fd_in);
}

function GeneratePage($length, $file)
{
    include 'config.php';
    $generatedSymbols = generateRandomString();
    $tmpName = $file['sharex']['tmp_name'];
    $fileSize = $file['sharex']['size'] >> 10;
    $originalName = $file['sharex']['name'];
    date_default_timezone_set('Europe/Vienna');
    $uploadTime = date('l\, F jS\, Y, H:i');
    $encEmojis = urlencode($generatedSymbols);
    $target_file = $_FILES['sharex']['name'];
    $color = rand_color();
    $directoryPath = "media/{$generatedSymbols}";
    mkdir($directoryPath, 0777, true);
    chmod($directoryPath, 0777);

    $fileType = pathinfo($target_file, PATHINFO_EXTENSION);
    $originalFileType = $fileType;

    // Select the appropriate template file based on the file type
    if ($fileType == 'mp4' || $fileType == 'webm' || $fileType == 'ogg') {
        $templateFile = 'templates/template_video.html';
    } elseif (
        $fileType == 'mov' ||
        $fileType == 'wmv' ||
        $fileType == 'avi' ||
        $fileType == 'avchd' ||
        $fileType == 'mkv'
    ) {
        $templateFile = 'templates/template_video_others.html';
        $fileType = 'mp4'; // Set the file type to mp4 as html does not support playback of e.g. mov video format. $originalFileType still contains the original file type e.g. for download.
    } elseif (
        $fileType == 'jpeg' ||
        $fileType == 'png' ||
        $fileType == 'gif' ||
        $fileType == 'tiff' ||
        $fileType == 'jpg' ||
        $fileType == 'jfif'
    ) {
        $templateFile = 'templates/template_image.html';
    } 

    // Read the template file
    $template = file_get_contents($templateFile);

    // Replace the placeholders with dynamic values
    $template = str_replace('%color%', $color, $template);
    $template = str_replace('%originalName%', $originalName, $template);
    $template = str_replace('%fileSize%', $fileSize, $template);
    $template = str_replace('%fileType%', $fileType, $template);
    $template = str_replace('%uploadTime%', $uploadTime, $template);
    $template = str_replace('%imgurl%', "{$directoryPath}/image.{$fileType}", $template);
    $template = str_replace('%originalType%', $originalFileType, $template);
    $template = str_replace('%generatedSymbols%', $generatedSymbols, $template);
    $template = str_replace('%author%', $author, $template);
    $template = str_replace('%mediafolder%', $mediafolder, $template);
    $template = str_replace('%sitename%', $sitename, $template);
    $target_file = $_FILES['sharex']['name'];
    $tmpName = $file['sharex']['tmp_name'];

    if (move_uploaded_file($tmpName, "{$directoryPath}/old.{$fileType}")) {
        remove_exif("{$directoryPath}/old.{$fileType}", "{$directoryPath}/image.{$fileType}");
        unlink("{$directoryPath}/old.{$fileType}");
        file_put_contents("{$directoryPath}/index.html", $template);
        chmod($directoryPath, 0755);
        return $generatedSymbols;
    }
}