我有以下用于上传的php代码：
$data = array();
$filesCount = count($_FILES['img']['name']);
for($i = 0; $i < $filesCount; $i++)
{
$_FILES['userFile']['name'] = $_FILES['img']['name'][$i];
$_FILES['userFile']['type'] = $_FILES['img']['type'][$i];
$_FILES['userFile']['tmp_name'] = $_FILES['img']['tmp_name'][$i];
$_FILES['userFile']['error'] = $_FILES['img']['error'][$i];
$_FILES['userFile']['size'] = $_FILES['img']['size'][$i];
$id = $this->session->userdata('ses_id');
$tabel = $this->session->userdata('ses_tabel');
if (!file_exists('uploads/'.$tabel.'/kategori'))
{
mkdir('uploads/'.$tabel.'/kategori', 0777, true);
}else{
$uploadPath = 'uploads/'.$tabel.'/kategori';
$newname = $idkategori.'_'.$nama;
$config['upload_path'] = $uploadPath;
$config['allowed_types'] = 'jpg|png|jpeg';
$config['file_name'] = $newname;
$this->load->library('upload', $config);
$this->upload->initialize($config);
if($this->upload->do_upload('userFile')){
$fileData = $this->upload->data();
$cfg['image_library'] = 'gd2';
$cfg['quality'] = '50%';
$this->load->library('image_lib');
$this->image_lib->initialize($cfg);
$this->image_lib->resize();
$uploadData[$i]['nama'] = $this->input->post('nama_kategori');
$uploadData[$i]['file_name'] = $fileData['file_name'];
$uploadData[$i]['created'] = date("Y-m-d H:i:s");
$uploadData[$i]['modified'] = date("Y-m-d H:i:s");
$uploadData[$i]['id_resto'] = $id;
$uploadData[$i]['id_kategori'] = $idkategori;
}
}
}
我的文件被上传但没有调整大小，我想调整图像的大小，这样当我在Android设备上请求时，图像文件就不会太大。如果可能的话，请帮我调整宽度和高度。
抱歉英语不好，非常感谢。
您需要为镜像库配置设置新上传的镜像的路径。
点击此处阅读更多信息。
$this->upload->initialize($config, true); // important 2nd param
if ($this->upload->do_upload('userFile')) {
$fileData = $this->upload->data();
$cfg['source_image'] = $fileData['full_path'];
list($width, $height) = getimagesize($fileData['full_path']);
$cfg['width'] = $width - 1;
$cfg['height'] = $height - 1;
$cfg['image_library'] = 'gd2';
$cfg['quality'] = '50%';
$this->load->library('image_lib');
$this->image_lib->initialize($cfg);
if (!$this->image_lib->resize()) {
log_message('error', 'resize failed: ' . $this->image_lib->display_errors());
}
$this->image_lib->clear();
$uploadData[$i]['nama'] = $this->input->post('nama_kategori');
$uploadData[$i]['file_name'] = $fileData['file_name'];
$uploadData[$i]['created'] = date("Y-m-d H:i:s");
$uploadData[$i]['modified'] = date("Y-m-d H:i:s");
$uploadData[$i]['id_resto'] = $id;
$uploadData[$i]['id_kategori'] = $idkategori;
}
更新：
如果您只想更改质量：
所以我忘了我以前已经回答过这类问题了。如果你深入研究图像库代码，你会注意到质量变量只在实际需要调整大小时使用！CI检查图像大小是否与指定的输出大小匹配，是否匹配，或者如果在配置中没有指定图像宽度和高度，它只是继续移动…因此质量永远不会受到影响。要破解，您可以获得宽度和高度，并减去1px。我不认为这是一个错误，但更多的是一个疏忽。
我个人不喜欢CI的上传或图像库和使用https://github.com/verot/class.upload.php(这个问题不是问题(。
以下是我解决这一切的答案：Codeigner3 中的图像压缩
此函数使用PHP的GD库，将调整图像的大小，同时保持原始图像的适当纵横比。您也可以裁剪图像，使其裁剪并填充所需尺寸的空间。只是玩一些设置。
function scaleMyImage($filePath, $newPath, $newSize, $crop = NULL){
$img = imagecreatefromstring(file_get_contents($filePath));
$dst_x = 0;
$dst_y = 0;
$width = imagesx($img);
$height = imagesy($img);
$newWidth = $newSize;
$newHeight = $newSize;
$aspectRatio = $width/$height;
if($width < $height){ //Portrait.
if($crop){
$newWidth = floor($width * ($newSize / $width));
$newHeight = floor($height * ($newSize / $width));
$dst_y = (floor(($newHeight - $newSize)/2)) * -1;
}else{
$newWidth = floor($width * ($newSize / $height));
$newHeight = $newSize;
$dst_x = floor(($newSize - $newWidth)/2);
}
} elseif($width > $height) { //Landscape
if($crop){
$newWidth = floor($width * ($newSize / $height));
$newHeight = floor($height * ($newSize / $height));
$dst_x = (floor(($newWidth - $newSize)/2)) * -1;
}else{
$newWidth = $newSize;
$newHeight = floor($height * ($newSize / $width));
$dst_y = floor(($newSize - $newHeight)/2);
}
}
$finalImage = imagecreatetruecolor($newSize, $newSize);
imagecopyresampled($finalImage, $img, $dst_x, $dst_y, 0, 0, $newWidth, $newHeight, $width, $height);
//header('Content-Type: image/jpeg'); //<--Comment our if you want to save to file.
imagejpeg($finalImage, $newPath, 60); //<--3rd param is quality. 60 does good job. You can play around.
imagedestroy($img);
imagedestroy($finalImage);
}
$filePath = 'path/to/image.jpg';
$newPath = NULL; //Set to NULL to output to browser, otherwise provide a filepath to save.
$newSize = 400; //Pixels
$crop = 1; //Set to NULL if you don't want to crop.
scaleMyImage($filePath, $newPath, $newSize, $crop);
嘿，兄弟，试试这个代码来调整图像的大小
$fileData = $this->upload->data();
$configer = array(
'image_library' => 'gd2',
'source_image' => $fileData['full_path'],
'maintain_ratio' => TRUE,
'quality' => '40%' );
$this->image_lib->clear();
$this->image_lib->initialize($configer);
$this->image_lib->resize();