PHP htaccess Watermark Apostrophe Problem

I have a PHP script which places a watermark on images on my site.  The problem is, any image with an apostrophe in its URL no longer displays.  How can I modify my code so that this no longer happens?

Here's my code:

<?php
    
    /*
     * This script places a watermark on a given jpeg, png or gif image.
     */
    
      // loads a png, jpeg or gif image from the given file name
      function imagecreatefromfile($image_path) {
        // retrieve the type of the provided image file
        list($width, $height, $image_type) = getimagesize($image_path);
    
        // select the appropriate imagecreatefrom* function based on the determined
        // image type
        switch ($image_type)
        {
          case IMAGETYPE_GIF: return imagecreatefromgif($image_path); break;
          case IMAGETYPE_JPEG: return imagecreatefromjpeg($image_path); break;
          case IMAGETYPE_PNG: return imagecreatefrompng($image_path); break;
          default: return ''; break;
        }
      }
    
      // load source image to memory
      $image = imagecreatefromfile($_GET['image']);
      if (!$image) die('Unable to open image');
    
      // load watermark to memory
      $watermark = imagecreatefromfile($_GET['watermark']);
      if (!$image) die('Unable to open watermark');
    
      // calculate the position of the watermark in the output image (the
      // watermark shall be placed in the lower right corner)
      $watermark_pos_x = imagesx($image) - imagesx($watermark);
      $watermark_pos_y = imagesy($image) - imagesy($watermark);
    
      // merge the source image and the watermark
      imagecopy($image, $watermark,  $watermark_pos_x, $watermark_pos_y, 0, 0,
        imagesx($watermark), imagesy($watermark));
    
      // output watermarked image to browser
      header('Content-Type: image/jpeg');
      imagejpeg($image, '', 85);  // use best image quality (100)
    
      // remove the images from memory
      imagedestroy($image);
      imagedestroy($watermark);
    
    ?>

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Not sure if this matters but here's my .htaccess code:

RewriteEngine on
    RewriteRule ^(.*\.(jp?g))$ /videogames/watermark.php?image=$1&watermark=watermark.png [NC]

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