可定制的PHP缩略图生成程式(需要GD库支持)_php实例

经典的PHP缩略图生成程式,基于GD库,可指定生成路径及生成目标的宽高细节 使用方法: 在支持GD库的PHP环境中,将以下代码另存为resize.php测试

经典的PHP缩略图生成程式,基于GD库,可指定生成路径及生成目标的宽高细节

使用方法: 在支持GD库的PHP环境中,将以下代码另存为resize.php测试

<?  <br><br>$FILENAME="image_name";  <br><br>// 生成图片的宽度  <BR>$RESIZEWIDTH=400;  <br><br>// 生成图片的高度  <BR>$RESIZEHEIGHT=400;  <br><br>//生成图片的路径  <BR>$uploaddir="c:/winnt/temp";  <br><br>function ResizeImage($im,$maxwidth,$maxheight,$name){  <BR>global $uploaddir;  <BR>$width = imagesx($im);  <BR>$height = imagesy($im);  <BR>if(($maxwidth && $width > $maxwidth) || ($maxheight && $height > $maxheight)){  <BR>if($maxwidth && $width > $maxwidth){  <BR>$widthratio = $maxwidth/$width;  <BR>$RESIZEWIDTH=true;  <BR>}  <BR>if($maxheight && $height > $maxheight){  <BR>$heightratio = $maxheight/$height;  <BR>$RESIZEHEIGHT=true;  <BR>}  <BR>if($RESIZEWIDTH && $RESIZEHEIGHT){  <BR>if($widthratio < $heightratio){  <BR>$ratio = $widthratio;  <BR>}else{  <BR>$ratio = $heightratio;  <BR>}  <BR>}elseif($RESIZEWIDTH){  <BR>$ratio = $widthratio;  <BR>}elseif($RESIZEHEIGHT){  <BR>$ratio = $heightratio;  <BR>}  <BR>$newwidth = $width * $ratio;  <BR>$newheight = $height * $ratio;  <BR>if(function_exists("imagecopyresampled")){  <BR>$newim = imagecreatetruecolor($newwidth, $newheight);  <BR>imagecopyresampled($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);  <BR>}else{  <BR>$newim = imagecreate($newwidth, $newheight);  <BR>imagecopyresized($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);  <BR>}  <BR>ImageJpeg ($newim,$uploaddir.$name . ".jpg");  <BR>ImageDestroy ($newim);  <BR>}else{  <BR>ImageJpeg ($im,$uploaddir.$name . ".jpg");  <BR>}  <BR>}  <br><br><br><br>if($_FILES['image']['size']){  <BR>if(<div style="color:transparent">本文来源gaodai.ma#com搞##代!^码@网*</div><pre>搞gaodaima代码

$_FILES[‘image’][‘type’] == “image/pjpeg”){
$im = imagecreatefromjpeg($_FILES[‘image’][‘tmp_name’]);
}elseif($_FILES[‘image’][‘type’] == “image/x-png”){
$im = imagecreatefrompng($_FILES[‘image’][‘tmp_name’]);
}elseif($_FILES[‘image’][‘type’] == “image/gif”){
$im = imagecreatefromgif($_FILES[‘image’][‘tmp_name’]);
}
if($im){
if(file_exists(“$FILENAME.jpg”)){
unlink(“$FILENAME.jpg”);
}
ResizeImage($im,$RESIZEWIDTH,$RESIZEHEIGHT,$FILENAME);
ImageDestroy ($im);
}
}
?>

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