PHP中的图片上传概念

Question

how to take image from one folder and rename and re-size the images and move to another folder? I need to get image from one folder and rename and re-size the same image and move into another folder using php

Answer 1

You will most likely be using gd for resizing the images. Here is a pretty crappy, but hopefully useful code sample. In this case, $originalName is the name given in the $_FILES array's tmp_name position. I am resizing to a width of 1200 in this case, with the height adapting according to such width. You might (and most likely will) not desire this behavior. This is just some ugly code I used in some courses I taught about 3 years ago, I don't have the newer samples in this computer so you will have to get used to the idea :)

$newDir is where the file will be located. by calling imagejpeg or imagepng and passing the filename as second argument, it means to the function that you wish to save the image in that location.

if ($type == 'image/jpeg') {
    $original = imagecreatefromjpeg($originalName);
}
else {
    $original = imagecreatefrompng($originalName);
}
$width = imagesx($original);
$height = imagesy($original);
//prepare for creation of image with width of 1000
$new_height = floor($height * (1200 / $width));
// create the 1200 width image
$tmp_img = imagecreatetruecolor(1200, $new_height);
// copy and resize old image into new image
imagecopyresized($tmp_img, $original, 0, 0, 0, 0, 
                 1200, $new_height, $width, $height);
//create a random and unique name to identify (here it isn't that random ;)

$newDir = '/this/is/some/directory/and/filename.';
if ($type == 'image/jpeg') {
    imagejpeg($tmp_img, $newDir."jpg");
}
else {
    imagepng($tmp_img, $newDir."png");
}

Answer 2

PHP已经内置了许多文件系统功能（例如， rename ），您将在此处找到使用GD库调整图像大小所需的大部分功能。

Answer 3

There are libraries available in PHP for image resize. Here are some useful links you may like.

1. http://www.fliquidstudios.com/2009/05/07/resizing-images-in-php-with-gd-and-imagick/

2. http://php.net/manual/en/book.image.php

3. PHP/GD - Cropping and Resizing Images

4. http://net.tutsplus.com/tutorials/php/image-resizing-made-easy-with-php/

Answer 4

Use imagick library to resize; it's good.

Answer 5

使用imagick http://php.net/manual/zh/imagick.resizeimage.php

Answer 6

If I were you I would write a PE using a diffent language (one that you might be best used to) to adjust anything of the given image then just feel free to phpexec it to do all the steps you mentioned, you can sit relax and wait for the end result. HHAHAHHA :-)