我正在尝试在用户上传时调整图片大小，但它没有调整大小，水印看起来非常小，图像很大，而且在较小的图像上看起来很大
这是我的代码
if (!empty($_FILES['IMG']['tmp_name']))
{
$config["upload_path"] = "./uploads/";
$config["allowed_types"] = "gif|jpg|png|jpeg";
$config["max_size"] = "20444448";
$config["encrypt_name"] = true;
$this->load->library("upload", $config);
if ($this->upload->do_upload('IMG'))
{
$photo = $this->upload->data();
$row1['photo'] = $photo['file_name'];
$this->ads_photos->create($row1);
$this->load->library('image_lib');
//make image smaller
$config['image_library'] = 'gd2';
$config['source_image'] = './uploads/' . $photo['file_name'];
$config['create_thumb'] = true;
$config['thumb_marker'] = '_thumb';
$config['master_dim'] = 'auto';
$config['quality'] = '70%';
$config['new_image'] = './uploads/cars-list/'. $photo['file_name'];
$config['width'] = '700';
$config['height'] = '300';
$this->image_lib->clear();
$this->image_lib->initialize($config);
$this->image_lib->resize();
$config['image_library'] = 'gd2';
$config['source_image'] = './uploads/cars-list/'. $photo['file_name'];
$config['wm_type'] = 'overlay';
$config['wm_overlay_path'] = './uploads/watermark.png';
//the overlay image (watermark)
$config['wm_opacity'] = 60;
$config['wm_vrt_alignment'] = 'bottom';
$config['wm_hor_alignment'] = 'right';
$config['create_thumb'] = true;
$config['new_image'] = './uploads/cars-list/'. $photo['file_name'];
$config['width'] = '400';
$config['height'] = '250';
$this->image_lib->initialize($config);
$this->image_lib->resize();
if (!$this->image_lib->watermark()) {
$this->session->set_userdata('message', $this->image_lib->display_errors());
}
//the rest of code is adding the images to database
}
}
我尝试了很多修复工作，已经过了2周，没有任何工作
答案 0 :(得分：0)
我有调整大小图像的片段。我已将此代码用于许多项目。
任何控制器：
$this->modelname->resizeImage($originalImagepath,$toWidth,$toHeight,$filename, $path, $extention);
在模型中（modelname.php）
/**
* Resize Image
**/
function resizeImage($originalImage,$toWidth,$toHeight,$filename, $path, $extention){
$new_width = $toWidth;
$new_height = $toHeight;
// Get the original geometry and calculate scales
list($width, $height) = getimagesize($originalImage);
$xscale=$width/$toWidth;
$yscale=$height/$toHeight;
if(($width > $toWidth) && ($height > $toHeight))
{
// Recalculate new size with default ratio
if ($yscale<$xscale){
$new_width = round($width * (1/$yscale));
$new_height = round($height * (1/$yscale));
}
else {
$new_width = round($width * (1/$xscale));
$new_height = round($height * (1/$xscale));
}
}
else
{
$new_width = $width;
$new_height = $height;
}
// Resize the original image
$imageResized = imagecreatetruecolor($new_width, $new_height);
if($extention == 'image/jpeg' || $extention == 'image/jpg') {
$imageTmp = imagecreatefromjpeg ($originalImage);
imagecopyresampled($imageResized, $imageTmp, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
imagejpeg($imageResized,$path."thumb_".$filename,100);
}
else if($extention == 'image/png')
{
$imageTmp = imagecreatefrompng ($originalImage);
imagecopyresampled($imageResized, $imageTmp, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
imagepng($imageResized,$path."thumb_".$filename);
}
else if($extention == 'image/gif')
{
$imageTmp = imagecreatefromgif ($originalImage);
imagecopyresampled($imageResized, $imageTmp, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
imagegif($imageResized,$path."thumb_".$filename,100);
}
return $imageResized;
}
一切顺利。
答案 1 :(得分：0)
您遇到的主要问题是您多次覆盖$config变量（总是很好地为每个操作启动一个新变量）。而你也覆盖了水印/调整大小的版本：
if (!empty($_FILES['IMG']['tmp_name'])) {
$upload["upload_path"] = "./uploads/";
$upload["allowed_types"] = "gif|jpg|png|jpeg";
$upload["max_size"] = "20444448";
$upload["encrypt_name"] = true;
$this->load->library("upload", $upload);
if (!$this->upload->do_upload('IMG')) {
$this->session->set_userdata('message', $this->upload->display_errors());
redirect('somepage');
}
$photo = $this->upload->data();
$row1['photo'] = $photo['file_name'];
$this->ads_photos->create($row1);
$this->load->library('image_lib');
// Make 700x300 image {image_name)_thumb
$config1['image_library'] = 'gd2';
$config1['source_image'] = './uploads/' . $photo['file_name'];
$config1['create_thumb'] = true;
$config1['thumb_marker'] = '_thumb';
//$config1['master_dim'] = 'auto'; // DEFAULT IS ALREADY AUTO
$config1['quality'] = '70%';
$config1['new_image'] = './uploads/cars-list/' . $photo['file_name'];
$config1['width'] = '700';
$config1['height'] = '300';
$this->image_lib->initialize($config1);
if (!$this->image_lib->resize()) {
// NOTE: uncomment all unlink statements so if an error occurs the images
// are deleted to prevent duplicates down the line or orphans
//@unlink('./uploads/' . $photo['file_name']);
$this->session->set_userdata('message', $this->image_lib->display_errors());
redirect('somepage');
}
$this->image_lib->clear();
// Make 400x250 watermarked image {image_name)_watermarked
$config2['image_library'] = 'gd2';
$config2['source_image'] = './uploads/cars-list/' . $photo['raw_name'] . $config1['thumb_marker'] . $photo['file_ext'];
$config2['wm_type'] = 'overlay';
// make sure watermark.png is much smaller than the 400x250 image
// or it will go all bonkers (this may require some trial and error)
$config2['wm_overlay_path'] = './uploads/watermark.png';
$config2['wm_opacity'] = 60;
$config2['wm_vrt_alignment'] = 'bottom';
$config2['wm_hor_alignment'] = 'right';
$config2['thumb_marker'] = '_watermarked'; // !important
$config2['create_thumb'] = true;
$config2['new_image'] = './uploads/cars-list/' . $photo['raw_name'] . $photo['file_ext'];
$config2['width'] = '400';
$config2['height'] = '250';
$this->image_lib->clear();
$this->image_lib->initialize($config2);
$this->image_lib->resize();
if (!$this->image_lib->resize() || !$this->image_lib->watermark()) {
//@unlink('./uploads/' . $photo['file_name']);
//@unlink('./uploads/cars-list/' . $photo['raw_name'] . $config1['thumb_marker'] . $photo['file_ext']);
//@unlink('./uploads/cars-list/' . $photo['raw_name'] . $config2['thumb_marker'] . $photo['file_ext']);
$this->session->set_userdata('message', $this->image_lib->display_errors());
redirect('somepage');
}
// made it this far! success!
// names/paths of files to be added to db
$main_image = './uploads/' . $photo['file_name'];
$thumb = './uploads/cars-list/' . $photo['raw_name'] . $config1['thumb_marker'] . $photo['file_ext'];
$watermarked = './uploads/cars-list/' . $photo['raw_name'] . $config2['thumb_marker'] . $photo['file_ext'];
}