mirror of https://github.com/helloxz/imgurl
89 lines
3.2 KiB
PHP
89 lines
3.2 KiB
PHP
<?php
|
||
/* 图片处理类 */
|
||
defined('BASEPATH') OR exit('No direct script access allowed');
|
||
|
||
class Image{
|
||
protected $CI;
|
||
|
||
//构造函数
|
||
public function __construct(){
|
||
//附属类，让其可以访问CI的资源
|
||
$this->CI = & get_instance();
|
||
}
|
||
public function thumbnail($source,$width,$height){
|
||
//获取缩略图名称
|
||
$source = str_replace("\\","/",$source);
|
||
$imgarr = explode("/",$source);
|
||
//获取图片信息
|
||
$imginfo = getimagesize($source);
|
||
//图片宽
|
||
$img_w = $imginfo[0];
|
||
//图片高
|
||
$img_h = $imginfo[1];
|
||
//图片MIME类型
|
||
$mime = $imginfo['mime'];
|
||
//获取源文件名
|
||
$filename = end($imgarr);
|
||
$imgname = explode(".",$filename);
|
||
//缩略图名称
|
||
$thumbnail_name = $imgname[0].'_thumb'.'.'.$imgname[1];
|
||
|
||
//获取文件路径
|
||
$dirname = dirname($source); //获取的路径最后没有/
|
||
//缩略图完整路径
|
||
$thumbnail_full = $dirname.'/'.$thumbnail_name;
|
||
// 创建缩略图
|
||
//原图宽高大于缩略图
|
||
if(($img_w > $width) || ($img_h > $height)){
|
||
//如果是WEBP/SVG则不裁剪
|
||
if(($mime === 'image/webp') OR ($mime === 'image/svg+xml')){
|
||
return FALSE;
|
||
}
|
||
//检测是否支持ImageMagick
|
||
elseif($this->check()){
|
||
//使用ImageMagick裁剪图像
|
||
$image = new Imagick($source);
|
||
$image->cropThumbnailImage( $width, $height );
|
||
//将缩略图输出到文件
|
||
$image->writeImage( $thumbnail_full );
|
||
//清理工作
|
||
$image->clear();
|
||
return TRUE;
|
||
}
|
||
//不支持ImageMagick，使用GD2进行裁剪
|
||
else{
|
||
//配置裁剪参数，参考：https://codeigniter.org.cn/user_guide/libraries/image_lib.html
|
||
$config['image_library'] = 'gd2';
|
||
$config['source_image'] = $source;
|
||
$config['create_thumb'] = TRUE;
|
||
$config['maintain_ratio'] = TRUE;
|
||
$config['width'] = $width;
|
||
$config['height'] = $height;
|
||
$this->CI->load->library('image_lib', $config);
|
||
$this->CI->image_lib->resize();
|
||
return TRUE;
|
||
}
|
||
}
|
||
//图片像素太小了，不创建缩略图
|
||
else{
|
||
return FALSE;
|
||
}
|
||
}
|
||
//检测是否支持ImageMagick
|
||
protected function check(){
|
||
$ext = get_loaded_extensions();
|
||
//如果已经安装ImageMagick
|
||
if(array_search('imagick',$ext)){
|
||
return TRUE;
|
||
}
|
||
else{
|
||
return FALSE;
|
||
}
|
||
}
|
||
//压缩图片
|
||
public function compress($source){
|
||
|
||
}
|
||
}
|
||
|
||
?>
|