php CodeIgniter 上传图片，然后调整它的大小
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CodeIgniter Upload image and then resize it
提问by user794846
I am trying to upload images and resize them, so far the upload is working and also the creation of thumb nail images. But I cant get the original image to be resized. All that is happening is the file is directly uploaded to the folder in its original size. I guess I am trying to take this image resize it then overwrite the originally uploaded file.
我正在尝试上传图像并调整它们的大小，到目前为止，上传工作正常，并且还在创建拇指指甲图像。但我无法调整原始图像的大小。所发生的只是文件以其原始大小直接上传到文件夹。我想我正在尝试调整此图像的大小，然后覆盖最初上传的文件。
Here is my code what am I missing:
这是我的代码我缺少什么：
//Initialise the upload file class
$config['upload_path'] = './image_uploads/';
$config['allowed_types'] = 'jpg|jpeg|gif|png';
$config['max_size'] = '6048';
$this->load->library('upload', $config);
$userfile = "_upload_image";
//check if a file is being uploaded
if(strlen($_FILES["_upload_image"]["name"])>0){
if ( !$this->upload->do_upload($userfile))//Check if upload is unsuccessful
{
$upload_errors = $this->upload->display_errors('', '');
$this->session->set_flashdata('errors', 'Error: '.$upload_errors);
redirect('admin/view_food/'.$food->course_id);
}
else
{
//$image_data = $this->upload->data();
////[ THUMB IMAGE ]
$config2['image_library'] = 'gd2';
$config2['source_image'] = $this->upload->upload_path.$this->upload->file_name;
$config2['new_image'] = './image_uploads/thumbs';
$config2['maintain_ratio'] = TRUE;
$config2['create_thumb'] = TRUE;
$config2['thumb_marker'] = '_thumb';
$config2['width'] = 75;
$config2['height'] = 50;
$this->load->library('image_lib',$config2);
if ( !$this->image_lib->resize()){
$this->session->set_flashdata('errors', $this->image_lib->display_errors('', ''));
}
//[ MAIN IMAGE ]
$config['image_library'] = 'gd2';
$config['source_image'] = $this->upload->upload_path.$this->upload->file_name;
//$config['new_image'] = './image_uploads/';
$config['maintain_ratio'] = TRUE;
$config['width'] = 250;
$config['height'] = 250;
$this->load->library('image_lib',$config);
if ( !$this->image_lib->resize()){
$this->session->set_flashdata('errors', $this->image_lib->display_errors('', ''));
}
}
}
采纳答案by Altrim
Did you tried to add this to the config options
您是否尝试将其添加到配置选项中
$config['overwrite'] = TRUE;
This should do the trick.
这应该可以解决问题。
According to the documentation
根据文档
If set to true, if a file with the same name as the one you are uploading exists, it will be overwritten. If set to false, a number will be appended to the filename if another with the>same name exists.
如果设置为 true，如果存在与您上传的文件同名的文件，它将被覆盖。如果设置为 false，如果存在另一个具有>相同名称的文件名，则会在文件名后附加一个数字。
回答by Maitho David
i have been trying to create thumbnails for the past 20 hrs and i was not successful until i realized where i was messing up with the code, i was not INITIALIZING my config array!!!
在过去的 20 小时里，我一直在尝试创建缩略图，但直到我意识到我在哪里弄乱了代码，我才成功，我没有初始化我的配置数组！！！
Just add this line of code after loading your image_lib
只需在加载image_lib后添加这行代码
$this->image_lib->initialize($config);
Hope this works for you...........thumbs up!
希望这对你有用.........竖起大拇指！
回答by Oguz Kurtcuoglu
If you like to play with Image with CI, I highly recommend , image_moo library.
如果你喜欢用 CI 来玩 Image，我强烈推荐 image_moo 库。
