Write a Program to upload image with extension gif or jpeg. Write a PHP script to create watermarks using Imagecopymerge. Write a PHP script to convert images to grayscale || DWPD Sem 5 Practical 19

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DWPD : Practical 19-A

Write a Program to upload image with extension gif or jpeg



Script for index.php file<!DOCTYPE html>
<html>
<body>

<form action="upload.php" method="post" enctype="multipart/form-data">
    Select image to upload:
    <input type="file" name="fileToUpload" id="fileToUpload">
    <input type="submit" value="Upload Image" name="submit">
</form>

</body>
</html>

Output :

Script for upload.php file<?php
$target_dir = "uploads/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]); 

$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION); 

if(isset($_POST["submit"])) {
    $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
    if($check !== false) {
        echo "File is an image<br>File Type - " . $check["mime"] . ".";
        $uploadOk = 1;
    } else {
        echo "File is not an image.";
        $uploadOk = 0;
    }
}
if ($uploadOk == 0)
{
    echo "Sorry, your file was not uploaded.";
}
else
{
 if($check["mime"]=="image/gif" or $check["mime"]=="image/jpeg")
 {
  if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file))
  {
   echo "<br>Your file <b>". basename( $_FILES["fileToUpload"]["name"]). "</b> has been uploaded.";
  }
  else
  {
   echo "Sorry, there was an error uploading your file.";
  }
 }
 else
 {
  echo "<h3>Only .gif And .jpeg files allowed</h3>";
 }
}
?>


Output :


 

DWPD : Practical 19-B
Write a PHP script to create watermarks using Imagecopymerge



Script for index.php file<?php
 $sourceImage = 'wtr.jpg';
 $destImage = 'sunset.jpg';

 list($srcWidth, $srcHeight) = getimagesize($sourceImage);
 $src = imagecreatefromjpeg($sourceImage);
 $dest = imagecreatefromjpeg($destImage);

 imagecolortransparent($src,imagecolorat($src,0,0));
 imagecopymerge($dest,$src,10,10,0,0,$srcWidth,$srcHeight,50);
 imagejpeg($dest,'use-imagecopymerge()-to-watermark-an-image-with-php.jpg',100);
 imagedestroy($src);
 imagedestroy($dest);
?>

Output :


 

DWPD : Practical 19-C
Write a PHP script to convert images to grayscale



Script for index.php file<?php
 $source_file="sr.jpg";
 $im=ImageCreateFromJpeg($source_file);
 $imgw=imagesx($im);
 $imgh=imagesy($im);
 
 for($i=0;$i<$imgw;$i++)
 {
  for($j=0;$j<$imgh;$j++)
  {
   $rgb=ImageColorAt($im,$i,$j);
   $rr=($rgb >> 16) & 0xFF;
   $gg=($rgb >> 8) & 0xFF;
   $bb=$rgb & 0xFF;
   $g=round(($rr+$gg+$bb)/3);
   $val=imagecolorallocate($im,$i,$j,$val);
   imagesetpixel($im,$i,$j,$val);
  }
 }
 header('Content-type: image/jpeg');
 imagejpeg($im);
?>

Output :



 

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