本文实例讲述了CI框架封装的常用图像处理方法。分享给大家供大家参考，具体如下：
其实微信手机端上图时，列表图最好是缩略图，节省流量，这不，又被移动坑了一把，话费签一分就停机，流量欠到90块才停机，我也是醉了。。。
不说废话了，下面是用CI 的内置处理图像的库写的，小弟不才，遗漏之处敬请指出，谢谢。
/** * 生成缩略图 * @param $path 原图的本地路径 * @return null 创建一个 原图_thumb.扩展名 的文件 * */ public function dealthumb($path){ $config['image_library'] = 'gd2'; $config['source_image'] = $path; $config['create_thumb'] = TRUE; //生成的缩略图将在保持纵横比例 在宽度和高度上接近所设定的width和height $config['maintain_ratio'] = TRUE; $config['width'] = 80; $config['height'] = 80; $this->load->library('image_lib', $config); $this->image_lib->resize(); $this->image_lib->clear(); } /* * 处理图像旋转 */ public function transroate($path,$imgpath){ $this->load->library('image_lib'); //(必须)设置图像库 $config['image_library'] = 'gd2'; $newname = time().'_rote.jpg'; //设置图像的目标名/路径 $config['new_image'] =$imgpath.$newname; //(必须)设置原始图像的名字/路径 $config['source_image'] = $path; //决定新图像的生成是要写入硬盘还是动态的存在 $config['dynamic_output'] = FALSE; //设置图像的品质。品质越高，图像文件越大 $config['quality'] = '90%'; //有5个旋转选项 逆时针90 180 270 度 vrt 竖向翻转 hor 横向翻转 $config['rotation_angle'] = 'vrt'; $this->image_lib->initialize($config); if(@$this->image_lib->rotate()){ $this->image_lib->clear(); return $config['new_image']; }else{ $this->image_lib->clear(); return ''; } } /** * 处理图像水印 */ public function overlay($path,$imgpath){ $this->load->library('image_lib'); $newname = time().'_over.jpg'; //设置新图像名称 $config['new_image'] =$imgpath.$newname; //调用php gd库 绘图 $config['image_library'] = 'gd2'; //源图像 本地地址 $config['source_image'] = $path; //覆盖文字 $config['wm_text'] = 'Copyright 2015 - Friker'; //覆盖类型 文字/图像 $config['wm_type'] = 'text'; //文字字体类型 //$config['wm_font_path'] = 'C:WindowsFontsvrinda.ttf'; //字体大小 $config['wm_font_size'] = '16'; //字体颜色 $config['wm_font_color'] = 'ff0000'; //垂直方向距离顶端距离 $config['wm_vrt_alignment'] = '20'; //水平方向距离左端距离 $config['wm_hor_alignment'] = 'center'; //padding $config['wm_padding'] = '20'; $this->image_lib->initialize($config); if($this->image_lib->watermark()){ $this->image_lib->clear(); return $config['new_image']; }else{ $this->image_lib->clear(); return ''; } } /** * 处理图片上传 * 文件上传类 通过前台 上传文件 */ public function uploadfile(){ //文件上传部分 // 处理文件 // $data = ''; $this->load->helper('url'); $formpic = key($_FILES); //文件处理部分 if(false === empty($_FILES[$formpic]['tmp_name'])){ //设置文件上传的路径 $upload['upload_path'] = "./public/img/"; //限制文件上传的类型 $upload['allowed_types'] = 'jpeg|jpg|gif|png'; //限制文件上传的大小 $upload['max_size'] = 2048; //设置文件上传的路径 $upload['file_name'] = date('YmdHis', time()).rand(10000, 99999); //加载文件上传配置信息 $this->load->library('upload', $upload); //处理文件上传 $this->upload->do_upload($formpic); //返回文件上传信息 $image = $this->upload->data(); /* 'file_name' => string '2015071702051718388.jpg' (length=23) 'file_type' => string 'image/jpeg' (length=10) 'file_path' => string 'E:/wamp/www/testci/public/img/' (length=30) 'full_path' => string 'E:/wamp/www/testci/public/img/2015071702051718388.jpg' (length=53) 'raw_name' => string '2015071702051718388' (length=19) 'orig_name' => string '2015071702051718388.jpg' (length=23) 'client_name' => string 'u=415761610,1548338330&fm=116&gp=0.jpg' (length=38) 'file_ext' => string '.jpg' (length=4) 'file_size' => float 3.74 'is_image' => boolean true 'image_width' => int 146 'image_height' => int 220 'image_type' => string 'jpeg' (length=4) 'image_size_str' => string 'width="146" height="220"' (length=24) */ //var_dump($image); //返回文件上传名字 $data = $image['file_name']; $this->dealthumb($image['full_path']); $this->overlay($image['full_path'],$image['file_path']); $this->transroate($image['full_path'],$image['file_path']);// $thumbdata = ''; //生成缩略图名称 $pos = strripos($image['file_name'], "."); $newname = substr($image['file_name'], 0,$pos)."_thumb".substr($image['file_name'], $pos); if(file_exists($image['file_path'].$newname)){ $thumbdata = $newname; } } //$dirroot = $_SERVER['DOCUMENT_ROOT']; //$this->dealthumb($dirroot."/public/img/".$data); //上传失败 if(!$data){ echo json_encode(array('status'=>0,'msg'=>"上传失败！")); }else{ //上传成功 echo json_encode(array( 'name'=>$data, 'pic'=>base_url()."public/img/".$data, 'picthumb'=>$thumbdata == '' ?$data:$thumbdata )); } }
下面是前端的基本html代码：
<!doctype html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <link rel="stylesheet" href="/public/stylesheets/bootstrap.min.css" /> <link rel="stylesheet" href="/public/stylesheets/bootstrap-responsive.min.css" /> <link rel="stylesheet" href="/public/stylesheets/matrix-style.css" /> <link rel="stylesheet" href="/public/stylesheets/matrix-media.css" /> <script type="text/javascript" src="http://www.jb51.netpublic/javascripts/jquery.min.js"></script> <script type="text/javascript" src="http://www.jb51.netpublic/javascripts/jquery.form.js"></script> <script type="text/javascript" src="http://www.jb51.netpublic/javascripts/jquery.validate.js"></script> <style type="text/css"> body{background:#eeeeee; margin:0px;} </style> </head> <body> <div> <label> 分享logo： </label> <div> <input type="file" name="sharepic" id="sharepic"/> <input type="hidden" name="act_sharepic" value="" id="act_sharepic"/>(<sapn>最佳大小为 80 X 80 像素</sapn>) <p><img src="http://www.jb51.netpublic/img/default.png" alt="" id="sharepic_img"></p> </div> </div> <script type="text/javascript"> $(function () { /*****************图片上传部分开始 *******************/ var act = "<form action='"+"<?php echo site_url('mytest/uploadfile');"' method='post' enctype='multipart/form-data'></form>"; $("#sharepic").change(function(){ $(this).wrap(act); $(this).parent(".myupload").ajaxSubmit({ dataType: 'json', success: function(data) { var src = data.pic; //更改预览图像地址 $('#sharepic_img').attr("src",src); $('#act_sharepic').val(data.name); $('#sharepic').unwrap(); }, error:function(xhr){ alert(JSON.parse(xhr)); } }); }); }) </script> </body> </html>
希望本文所述对大家基于CodeIgniter框架的PHP程序设计有所帮助。
【CI框架封装的常用图像处理方法(缩略图,水印,旋转,上传等)】相关文章：
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