嗨,根据ci文档,您可以使用image_lib调整图像大小,有些选项建议我们可以从该图像创建其他缩略图

create_thumb    FALSE   TRUE/FALSE (boolean)    Tells the image PRocessing function to create a thumb.  R
thumb_marker    _thumb  None    SPEcifies the thumbnail indicator. IT will be inserted just before the file extension,so mypic.jpg would become mypic_thumb.jpg    R

所以这是我的代码

$config_manip = array(
            'image_library' => 'GD2','source_image'  => "./uploads/avatar/tmp/{$this->input->post('new_val')}",'new_image'     => "./uploads/avatar/{$this->input->post('new_val')}",'maintain_ratio'=> TRUE,'create_thumb'  => TRUE,'thumb_marker'  => '_thumb','width'         => 150,'height'        => 150 
        );

        $this->load->library('image_lib',$config_manip);
        $this->image_lib->resize();

我会假设此代码调整我的图像大小,并创建一个缩略图,但我只获得一个具有指定尺寸的图像和_tump后缀

我也尝试添加此代码手动创建第二个图像,但它仍然无法工作,我只得到一个图像

$this->image_lib->clear();

$config_manip['new_image'] = 
"./uploads/avatar/thumbnail_{$this->input->post('new_val')}";

            $config_manip['width']     = 30 ;
            $config_manip['height']    = 30 ;
            $this->load->library('image_lib',$config_manip);
            $this->image_lib->resize();

public function do_resize()
{
    $filename = $this->input->post('new_val');
    $source_path = $_SERVER['DOCUMENT_ROOT'] . '/uploads/avatar/tmp/' . $filename;
    $target_path = $_SERVER['DOCUMENT_ROOT'] . '/uploads/avatar/';
    $config_manip = array(
        'image_library' => 'gd2','source_image' => $source_path,'new_image' => $target_path,'maintain_ratio' => TRUE,'create_thumb' => TRUE,'thumb_marker' => '_thumb','width' => 150,'height' => 150
    );
    $this->load->library('image_lib',$config_manip);
    if (!$this->image_lib->resize()) {
        echo $this->image_lib->display_errors();
    }
    // clear //
    $this->image_lib->clear();
}