
<?php  





//read-only of width and height after frist GET

function sendGetPage () {

  //too many ' and " in heredoc?

  $serverNamePhpSelf = $_SERVER['SERVER_NAME'].$_SERVER['PHP_SELF'];



 echo <<< endOfGetPage

<html>

<head>

<title>PHP Convert image file to ascii art</title>

</head>

<body bgcolor="black" text="white">

Specify a small image file to be converted to HTMLized-ASCII art

<br>

<form name="uploadForm" 

enctype="multipart/form-data"

action="http://$serverNamePhpSelf";

method="post">

  Filename:

<input type="file" size="30" maxlength="100"  name="uploadFile">

<input value="Upload" type="submit">

</form>

endOfGetPage;

}



//initial page load.  display form

if ($_SERVER['REQUEST_METHOD'] == 'GET') {

  bail("");    //no error.

}





$uploadFileTmp_name = $_FILES['uploadFile']['tmp_name'];

$uploadFileName = $_FILES['uploadFile']['name'];

$uploadFileSize = $_FILES['uploadFile']['size'];



if (!is_uploaded_file($uploadFileTmp_name) || $uploadFileSize==0) {

  bail("<b>Bad file! </b>Try again<p>\n");

}  







//echo "uploadFileName: ".$uploadFileName."<br>\n";

//echo "uploadFileTmp_name: ".$uploadFileTmp_name."<br>\n";



$pathinfoArray = pathinfo($uploadFileName);

$extension = strtoupper($pathinfoArray['extension']);

//echo "file extension: ".$extension."<br>\n";



switch ($extension) {

 case 'PNG':

   $im = ImageCreateFromPNG($uploadFileTmp_name);

   break;

 case 'GIF':

   $im = ImageCreateFromGIF($uploadFileTmp_name);

   break;

 case 'JPG':

 case 'JPEG':

   $im = ImageCreateFromJPEG($uploadFileTmp_name);

   break;

 default:

   bail("<b>Unknown file type: $extension</b><p>\n");

}



$dx = ImageSX($im);

$dy = ImageSY($im);

if ($dx>300 || $dy>300) {

  bail("<b>File too big!</b><p>\n");

}  



sendGetPage();



echo "<pre>\n";

echo "<font size=\"1\">\n";

//from "Programming PHP":

for($y=0; $y < $dy; $y++){

  for($x=0; $x < $dx; $x++){

    $col = ImageColorAt($im, $x, $y);

    $rgb = ImageColorsForIndex($im, $col);

    printf('<font color=#%02x%02x%02x>#</font>',

       $rgb['red'], $rgb['green'], $rgb['blue']);

  }

  //  echo "<br>\n";

  echo "\n";

}

echo "</pre>\n";

ImageDestroy($im);





echo "</body>\n</html>";









function bail ($reason) {

  echo $reason;

  sendGetPage();

  echo "</body>\n</html>";

  exit();

}



?>