如何在codeigniter中选择带有图片的整个文件夹？

I have a project in which i need to select whole folder with pictures inside it, and then do a transformation on all of the pictures inside the folder. Something similar like scripts in photoshop for massive pictures adjustment.

I don't think there is a function that could perform multiple image processing. But you could select files with glob() and then do your process in a loop ?

Check PHP's scandir() function

Loop through the results of your directory and do your image manipulation on each item.

Well, CodeIgniters Manual does have some helper functions, but I'm not using them myself.

Personally, I'm more comfortable using the DirectoryIterator PHP supplies you with. Combining this with CodeIgniters Image Manipulation Class you can achieve some pretty nifty handling of your image processing:

$images = array("jpg", "png", "bmp"); // Just to make sure that we get image files

foreach(new DirectoryIterator("/path/to/images/") as $file)
{
    if( $file->isFile() && in_array($file->getExtension(), $images) )
    {
        $config['image_library'] = 'imagemagick';
        $config['library_path'] = 'usr/bin/local/';
        $config['source_image'] = $file->getPathname();
        $config['new_image'] = $file->getPathname(); //Overwriting the source image
        $config['maintain_ratio'] = TRUE;
        $config['width']     = 75;
        $config['height']   = 50;       
        $this->load->library('image_lib', $config); 
        $this->image_lib->resize();
    }       
}

Or do some image processing of your own choice.

If you are using linux, you can mass edit the images using ImageMagick's mogrify command.

Example: mogrify -resize 150x150 *.jpg Result: all images were resized to 150x150

There is also a PHP class that deals with ImageMagick functionality in PEAR.