PHP Help

<?php
if(file_exists('/home/nintendo/public_html/picblur/' . $_POST['file'] . '.png'))
{
}
else
{
echo "Picture Does Not Exist!";
}

$im = imagecreatefrompng('/home/nintendo/public_html/picblur/' . $_POST['file'] . '.png');
$currentheight = 1;
$currentwidth = 1;
$size = getimagesize('/home/nintendo/public_html/picblur/' . $_POST['file'] . '.png');
$width = $size[0];
$height = $size[1];

while($done !== 'yes')
{
$rgb = imagecolorat($im, $currentheight, $currentwidth);
$r = ($rgb >> 16) & 0xFF;
$g = ($rgb >> 8) & 0xFF;
$b = $rgb & 0xFF;

$r = 255 - $r;
$g = 255 - $g;
$b = 255 - $b;

$color = imagecolorallocate($im,$r,$g,$b);

imagefilledrectangle($im,$currentwidth,$currentheight,$currentwidth,$currentheight,$color);
$currentwidth++;

 if($currentwidth < $width)
 {
 }
 else
 {
  if($currentheight <= $height)
  {
  }
  elseif($currentwidth = $width)
  {
  $currentheight++;
  $currentwidth = '1';
  }
  else
  {
  $done = 'yes';
  }
 }
}

header('Image/PNG');
imagepng($im);
imagedestroy($im);
?>

Code (markup):

Why does that return a 500 error?

 

Perahaps it's because the file does not exist? You test for it but the script still proceeds if it fails the test. Change it to read:

<?php
if(file_exists('/home/nintendo/public_html/picblur/' . $_POST['file'] . '.png'))
{

$im = imagecreatefrompng('/home/nintendo/public_html/picblur/' . $_POST['file'] . '.png');
$currentheight = 1;
$currentwidth = 1;
$size = getimagesize('/home/nintendo/public_html/picblur/' . $_POST['file'] . '.png');
$width = $size[0];
$height = $size[1];

while($done !== 'yes')
{
$rgb = imagecolorat($im, $currentheight, $currentwidth);
$r = ($rgb >> 16) & 0xFF;
$g = ($rgb >> 8) & 0xFF;
$b = $rgb & 0xFF;

$r = 255 - $r;
$g = 255 - $g;
$b = 255 - $b;

$color = imagecolorallocate($im,$r,$g,$b);

imagefilledrectangle($im,$currentwidth,$currentheight,$currentwidth,$currentheight,$color);
$currentwidth++;

 if($currentwidth < $width)
 {
 }
 else
 {
  if($currentheight <= $height)
  {
  }
  elseif($currentwidth = $width)
  {
  $currentheight++;
  $currentwidth = '1';
  }
  else
  {
  $done = 'yes';
  }
 }
}

header('Image/PNG');
imagepng($im);
imagedestroy($im);

}
else
{
echo "Picture Does Not Exist!";
}

?>

PHP:

 

What is the chmod settings of the directory "picblur"

 

You don't need to tell us that it returns a "500 error", you need to show the error logs.

 

Nevermind it was just the header. I set it wrong.

 

Once even I had a similar problem, and same way, changing the header did the job