我认为这个功能不如它应该有效。我很欣赏一些关于如何构建它以加快速度并减少内存的建议。这就是代码的作用：
我认为效率低下来自于将步骤3,4,5全部分开。有没有办法巩固它们？谢谢！
function insert()
{
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'jpg';
$config['max_size'] = '5000';
$config['max_width'] = '4096';
$config['max_height'] = '4096';
$this->load->library('upload', $config);
if (!$this->upload->do_upload())
{
$data = array('error' => $this->upload->display_errors());
$data['title'] = "Add Photo | Mark The Dark";
$this->load->view('photo_add_view', $data);
}
else
{
//get uploaded image info
$data = array('upload_data' => $this->upload->data());
//clean the data
$data = $this->input->xss_clean($data);
//get orientation info and erase it from POST variable
//$orientation = $_POST['orientation'];
//unset($_POST['orientation']);
//grab the tags
$tags = $_POST['tags'];
unset($_POST['tags']);
//add in some other stuff
$_POST['time'] = date('YmdHis');
$_POST['author'] = $this->dx_auth->get_user_id();
//insert it in the database
$this->db->insert('photos', $_POST);
$photo_id = $this->db->insert_id();
//add stuff to tags table
/*
$tags_array = preg_split('/[\s,;]+/', $tags);
foreach($tags_array as $tag)
{
if($tag != "" || $tag != null)
$this->db->insert('tags', array('id' => $photo_id, 'word' => $tag));
}*/
//CXtags
/*$tags_array = preg_split('/[\s,;]+/', $tags);
foreach($tags_array as $tag)
{
if($tag == "" || $tag == null)
{unset($tags_array[$tag]);}
}
*/
$tags_array = $this->CXTags->comma_to_array($tags);
foreach($tags_array as $tag)
{$tags_array[$tag] = $this->CXTags->make_safe_tag($tag);}
$topass = array(
'table' => 'photos',
'tags' => $tags_array,
'row_id' => $photo_id,
'user_id' => $_POST['author']
);
$this->CXTags->add_tags($topass);
//rename the file to the id of the record in the database
rename("./uploads/" . $data['upload_data']['file_name'], "./uploads/" . $photo_id . ".jpg");
list($width, $height, $type, $attr) = getimagesize("./uploads/" . $photo_id . '.jpg');
if (($orientation == 1) || ($orientation == 2))
{
//echo $orientation;
//rotate image
$config['image_library'] = 'GD2';
$config['source_image'] = './uploads/' . $photo_id . '.jpg';
if ($orientation == 1)
{
$config['rotation_angle'] = 270;
}
elseif ($orientation == 2)
{
$config['rotation_angle'] = 90;
}
$this->load->library('image_lib', $config);
$this->image_lib->initialize($config);
if(!$this->image_lib->rotate())
{
echo $this->image_lib->display_errors();
}
}
$this->load->library('image_lib');
if ($width > 600)
{
//resize image
$config['image_library'] = 'GD2';
$config['source_image'] = './uploads/' . $photo_id . '.jpg';
$config['new_image'] = './uploads/photos/' . $photo_id . '.jpg';
$config['create_thumb'] = FALSE;
$config['maintain_ratio'] = TRUE;
$config['width'] = 600;//180
$config['height'] = 480;
$config['master_dim'] = 'width';
$this->image_lib->initialize($config);
$this->load->library('image_lib', $config);
if(!$this->image_lib->resize())
{
echo $this->image_lib->display_errors();
}
}
else
{
$source = './uploads/' . $photo_id . '.jpg';
$destination = './uploads/photos/' . $photo_id . '.jpg';
rename($source, $destination);
/*//buggy php???
$result = copy($source, $destination);
echo "HO" . $result;
*/
}
//create thumbnail
$config['image_library'] = 'GD2';
$config['source_image'] = './uploads/photos/' . $photo_id . '.jpg';
$config['new_image'] = './uploads/thumbnails/' . $photo_id . '.jpg';
$config['create_thumb'] = TRUE;
$config['thumb_marker'] = '_thumb';
$config['maintain_ratio'] = TRUE;
$config['width'] = 180;//180
$config['height'] = 100;
$config['master_dim'] = 'width';
$this->image_lib->initialize($config);
$this->load->library('image_lib', $config);
$this->image_lib->resize();
redirect('photo/show/' . $photo_id);
}
//redirect('photo/photo_add/');
}
答案 0 :(得分：2)
对于使用代码点火器为您公开的对象进行图像处理所需的所有工作，您可能希望自己严格使用php中的gd函数来完成此操作。我没有使用过代码点火器，但是我已经在php中完成了很多图像处理工作，并且它并不是非常困难。
只需查看您的代码，我假设这是代码点火方式，我看到您为每个操作调用image_lib->initialize()和load->library()。我将查看这些方法以及您正在使用的rotate()和resize()方法，看看它们是否在每次操作时创建和销毁图像资源。如果使用gd库，则可以为每个步骤重用相同的图像资源，然后在准备好时将其写入文件（重新使用相同的图像资源来创建缩略图）。这可能会在执行速度和使用的内存方面带来巨大的性能提升。
答案 1 :(得分：2)
好吧，我可以回答你的部分问题 - 你可以使用 Codeigniter 旋转带有exif轮换的图像。
<强>首先：
检测上传的图片exif数据
查看$exif数组并处理Orientation项
将所需的旋转度传递给codeigniters image_lib->rotate()函数。
EG：
public function auto_rotate_image($upload_data){//iphone rotation fix
$path = $upload_data['full_path'];
$exif = exif_read_data($path);
if(isset($exif['Orientation'])){
$rotate = false;
switch($exif['Orientation']){//only really interested in the rotation
case 1: // nothing
break;
case 2:// horizontal flip
break;
case 3: // 180 rotate left
$rotate = 180;
break;
case 4: // vertical flip
break;
case 5: // vertical flip + 90 rotate right
break;
case 6: // 90 rotate right
$rotate = 270;
break;
case 7: // horizontal flip + 90 rotate right
break;
case 8: // 90 rotate left
$rotate = 90;
break;
}
if($rotate){
$config=array();
$config['image_library'] = 'gd2';
$config['source_image'] = $path;
$config['rotation_angle'] = $rotate;
$config['overwrite'] = TRUE;
$this->load->library('image_lib',$config);
if(!$this->image_lib->rotate()){
echo $this->image_lib->display_errors();
}
}
}
}
答案 2 :(得分：0)
您可以按照codeigniter documentation将其配置存储在其他地方，这样会收紧代码。我不知道你怎么能把这些事件联系起来。