PHP GD Functions


<?php

GdImage|false imagecreatefromgd2part ( string $filename,
                                                                       int $x,
                                                                       int $y,
                                                                       int $width,
                                                                       int $height )

where,

$filename = The path to an existing GD2 image

$x = x-coordinate of source point

$y = y-coordinate of source point

$width = The source width

$height = The source height 

?>

$filename

The path or stream resource.

$filename can reference a local file or, (configuration permitting), a remote file using one of the supported stream wrappers:

STREAM WRAPPERS	MEANING
file://	LOCAL File System
http://	URL HTTP
ftp://	URL FTP
php://	I/O streams
zlib://	Data Compression stream
data://	DATA (RFC-2397)
glob://	Find Filenames
phar://	PHP Archive
ssh2://	Secure Shell 2
rar://	RAR
ogg://	Audio
expect://	Interaction of stream processes
ed48

$x

x-coordinate of source point.

$y

y-coordinate of source point.

$width

The source width.

$height

The source height.

EXERCISE


<?php
 
echo 'PHP VERSION: ' . PHP_VERSION . '<br><br>';

$src_file = "gd2/GD2 004 03 (gif2gd2).gd2";

if (file_exists($src_file))
{
echo '<br>Source Image:<br><br>';

echo $src_file . '<br><br>';

echo '<br><br>The image EXISTS...<br>
          BUT CAN NOT BE DISPLAYED by this browser!<br><br><br>';

$src_file_x = 110;
$src_file_y = 110;
$sec_file_w = 167;
$sec_file_h = 125;

$im01 = 
imagecreatefromgd2part($src_file, $src_file_x, 
                                        $src_file_y, $sec_file_w, $sec_file_h);

// var_dump($im01);

$dst_file = "jpeg/JPEG 013 01 (gd2part2jpeg).jpg";

echo '<br><br>Target Image:';

echo '<br><br>' . $dst_file . '<br><br>';

imagejpeg($im01, $dst_file, 90);

?>

<img src="<?php echo $dst_file; ?>" 
alt="<?php echo $dst_file; ?>" 
title="<?php echo $$lang; ?>"><br><br>

<?php
imagedestroy($im01);
}
else
{
echo 'The SOURCE image DOES NOT EXIST!';
echo $src_file;
}

/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
 
   Current browsers, do not support .gd2.
   Therefore, files in this format should be transformed
   at .gif, .jpg or .png - to be displayed.

   - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */

?>