Php 调整图像大小，然后使用Codigniter进行裁剪

嗨，我正在使用Codigniter图像处理类来创建具有固定大小的缩略图 因此，我不会首先调整它的大小（因此，当我裁剪它时，我会得到一个大的图像和平） 然后修剪它 调整大小有效，但裁剪无效

这是我创建的函数

function _generate_thumbnail($filename)
{
$config['image_library']     = 'gd2';
$config['source_image']      = './project_pics/big/'.$filename;
$config['new_image']         = './project_pics/resize/'.$filename;
$config['maintain_ratio']    = TRUE;
$config['width']             = 650;

$this->load->library('image_lib');
$this->image_lib->initialize($config);
$this->image_lib->resize();

$this->image_lib->clear();

$config['image_library'] = 'gd2';
$config['source_image']  = './project_pics/resize/'.$filename;
$config['new_image']     = './project_pics/crop/'.$filename;
$config['width']         = 650;
$config['height']        = 450;
$config['x_axis']        = 0;
$config['y_axis']        = 0;

$this->load->library('image_lib');
$this->image_lib->initialize($config);
$this->image_lib->crop();   
}

---

使用Codeigniter的

image_lib

库有一些限制。使用此库时，不能一次完成

“调整大小并裁剪”

您必须在每个操作之间重新初始化

image_lib

，如下所示：

function _generate_thumbnail($filename)
{
 $config1 = $config2 = array();

 $config1['image_library']     = 'gd2';
 $config1['source_image']      = './project_pics/big/'.$filename;
 $config1['new_image']         = './project_pics/resize/'.$filename;
 $config1['maintain_ratio']    = TRUE;
 $config1['width']             = 650;

 $this->load->library('image_lib');
 $this->image_lib->initialize($config1);
 $this->image_lib->resize();

 $this->image_lib->clear();

 $config2['image_library'] = 'gd2';
 $config2['source_image']  = './project_pics/resize/'.$filename;
 $config2['new_image']     = './project_pics/crop/'.$filename;
 $config2['width']         = 650;
 $config2['height']        = 450;
 $config2['x_axis']        = 0;
 $config2['y_axis']        = 0;

 $this->image_lib->initialize($config2);
 $this->image_lib->crop();   
}

这对我有用