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a very easy to use function to get a resized resampled copy of an image. the copy can be saved to a server or put out directly to the browser. If you want to put the image directly out to serve you will have to put proper header information in the calling page.
NOTE: Input can only be jpg.
PNG will be added soon
Note: This script requires :
GD 2.0.1 or later
PHP >= 4.0.6
| <?php
/**
* @return Void
* @param Integer $cp_bigs
* @param String $picdir
* @param String $picname
* @param String/Boolean $copydir
* @desc Makes a resized and resampled scaled copy into specified directory. Returns false if fails.
*/
function make_res_copy($cp_bigs, $picdir, $picname, $copydir)
{
//check if file has a jpg (jpeg) extension
if(strstr(strtolower($picname), ".jpg") or strstr(strtolower($picname), ".jpeg"))
{
if(strstr(strtolower($picname), ".jpg") or strstr(strtolower($picname), ".jpeg"))
{
$im = ImageCreateFromJPEG($picdir . "/" . $picname);
}
//get the original image size
$size = getImageSize($picdir . "/" . $picname);
$dstX = 0;
$dstY = 0;
$srcX = 0;
$srcY = 0;
//decide wether picture is horizontally or vertically aligned
//-->ofcourse if the picture is rectangular all sides of the
//-->copy will be equal
if($size[0] < $size[1])
{
$ratio = $size[1]/$cp_bigs;
$dstW = $size[0] / $ratio;
$dstH = $cp_bigs;
}
elseif($size[0] == $size[1])
{
$dstW = $cp_bigs;
$dstH = $cp_bigs;
}
else
{
$ratio = $size[0]/$cp_bigs;
$dstW = $cp_bigs;
$dstH = $size[1] / $ratio;
}
$srcW = $size[0];
$srcH = $size[1];
$imdst = ImageCreateTruecolor($dstW, $dstH);
ImageCopyResampled($imdst, $im, $dstX, $dstY, $srcX, $srcY, $dstW, $dstH, $srcW, $srcH);
if($copydir)
ImageJPEG($imdst, $copydir . "/" . $picname);
else
ImageJPEG($imdst);
}
}
?> | |
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