iam尝试使用php将图像大小调整为缩略图!我没有错误,但它不会将缩略图保存在我的服务器上。代码是:
#Resize image
function resize($input_dir, $cur_file, $newwidth, $output_dir)
{
$filename = $input_dir.'/'.$cur_file;
$format='';
if(preg_match("/.jpg/i", $filename))
{
$format = 'image/jpeg';
}
if (preg_match("/.gif/i", $filename))
{
$format = 'image/gif';
}
if(preg_match("/.png/i", $filename))
{
$format = 'image/png';
}
if($format!='')
{
list($width, $height) = getimagesize($filename);
$newheight=$height*$newwidth/$width;
switch($format)
{
case 'image/jpeg':
$source = imagecreatefromjpeg($filename);
break;
case 'image/gif';
$source = imagecreatefromgif($filename);
break;
case 'image/png':
$source = imagecreatefrompng($filename);
break;
}
$thumb = imagecreatetruecolor($newwidth,$newheight);
imagealphablending($thumb, false);
imagecopyresized($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
imagejpeg($thumb, 'thumb_'.$cur_file);
}
}
我的功能如下:
resize(plugins_url().'/MyImagePlugin/img', 'testimg.jpg', "200");
图片位于我的插件Dic中的文件夹“img”中。有线的事情是,我没有得到任何错误?!对于img-folder,CHMOD为777。
任何帮助都将不胜感激。
答案 0 :(得分:2)
将图像保存在行中时,您没有使用任何路径:
imagejpeg($thumb, 'thumb_'.$cur_file);
$cur_file
设置为testing.jpg。
您应该添加文件名的路径,否则它将在当前目录中创建它。
更改类似于:
function resize($input_dir, $cur_file, $newwidth, $output_dir = "" )
{
if($output_dir == "") $output_dir = $input_dir;
.....
imagejpeg($thumb, $output_dir.'/thumb_'.$cur_file);
}
}
答案 1 :(得分:0)
我知道这不是你的做法,但我相信它可以帮到你。
if (isset($_FILES['image']['name']))
{
$saveto = "dirname/file.jpg";
move_uploaded_file($_FILES['image']['tmp_name'], $saveto);
$typeok = TRUE;
switch($_FILES['image']['type'])
{
case "image/gif": $src = imagecreatefromgif($saveto); break;
case "image/jpeg": // Both regular and progressive jpegs
case "image/pjpeg": $src = imagecreatefromjpeg($saveto); break;
case "image/png": $src = imagecreatefrompng($saveto); break;
default: $typeok = FALSE; break;
}
if ($typeok)
{
list($w, $h) = getimagesize($saveto);
$max = 500;
\\ you can change this to desired product for height and width.
$tw = $w;
$th = $h;
if ($w > $h && $max < $w)
{
$th = $max / $w * $h;
$tw = $max;
}
elseif ($h > $w && $max < $h)
{
$tw = $max / $h * $w;
$th = $max;
}
elseif ($max < $w)
{
$tw = $th = $max;
}
$tmp = imagecreatetruecolor($tw, $th);
imagecopyresampled($tmp, $src, 0, 0, 0, 0, $tw, $th, $w, $h);
imageconvolution($tmp, array( // Sharpen image
array(-1, -1, -1),
array(-1, 16, -1),
array(-1, -1, -1)
), 8, 0);
imagejpeg($tmp, $saveto);
imagedestroy($tmp);
imagedestroy($src);
}
}