VizHash_GD '.$VERSION.' - Visual Hash implementation in php4+GD.
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echo 'See homepage for more details.';
echo 'This is free software under the zlib/libpng licence
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echo '';
echo '
VizHash_GD accepts the following parameters:
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echo 't : string to hash
width: width of image (in pixels) (default:80, max:256)
height: height of image (in pixels) (default:80, max:256)
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echo 'Examples: "hi"';
$example_url=$_SERVER['PHP_SELF'].'?t=hi';
echo '
12x12:
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echo '
16x16:
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echo '
32x32:
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echo '
64x64:
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echo '
128x32:
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echo '
256x256:
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echo '';
exit;
}
$text = $_GET['t'];
// Size of vizshash in pixels (default:80x80)
$width=80; if (isset($_GET['width'])) { $width=$_GET['width']; }
$height=80; if (isset($_GET['height'])) { $height=$_GET['height']; }
if ($width>256) die("width is too big.");
if ($height>256) die("height is too big.");
// We hash the input string. (We don't use hash() to stay compatible with php4.)
$hash=sha1($text).md5($text);
$hash=$hash.strrev($hash); # more data to make graphics
// We convert the hash into an array of integers.
$VALUES=array();
for($i=0; $i