其實微信手機端上圖時，清單圖最好是縮略圖，節省流量，這不，又被移動坑了一把，話費簽一分就停機，流量欠到90塊才停機，我也是醉了。。。
不說廢話了，下面是用CI 的内置處理圖像的庫寫的，小弟不才，遺漏之處敬請指出，謝謝。
/**
* 生成縮略圖
* @param $path 原圖的本地路徑
* @return null 建立一個 原圖_thumb.擴充名 的檔案
*
*/
public function dealthumb($path){
$config['image_library'] = 'gd2';
$config['source_image'] = $path;
$config['create_thumb'] = TRUE;
//生成的縮略圖将在保持縱橫比例 在寬度和高度上接近所設定的width和height
$config['maintain_ratio'] = TRUE;
$config['width'] = 80;
$config['height'] = 80;
$this->load->library('image_lib', $config);
$this->image_lib->resize();
$this->image_lib->clear();
}
/*
* 處理圖像旋轉
*/
public function transroate($path,$imgpath){
$this->load->library('image_lib');
//(必須)設定圖像庫
$config['image_library'] = 'gd2';
$newname = time().'_rote.jpg';
//設定圖像的目标名/路徑
$config['new_image'] =$imgpath.$newname;
//(必須)設定原始圖像的名字/路徑
$config['source_image'] = $path;
//決定新圖像的生成是要寫入硬碟還是動态的存在
$config['dynamic_output'] = FALSE;
//設定圖像的品質。品質越高，圖像檔案越大
$config['quality'] = '90%';
//有5個旋轉選項 逆時針90 180 270 度 vrt 豎向翻轉 hor 橫向翻轉
$config['rotation_angle'] = 'vrt';
$this->image_lib->initialize($config);
if(@$this->image_lib->rotate()){
$this->image_lib->clear();
return $config['new_image'];
}else{
$this->image_lib->clear();
return '';
}
}
/**
* 處理圖像水印
*/
public function overlay($path,$imgpath){
$this->load->library('image_lib');
$newname = time().'_over.jpg';
//設定新圖像名稱
$config['new_image'] =$imgpath.$newname;
//調用php gd庫 繪圖
$config['image_library'] = 'gd2';
//源圖像 本地位址
$config['source_image'] = $path;
//覆寫文字
$config['wm_text'] = 'Copyright 2015 - Friker';
//覆寫類型 文字/圖像
$config['wm_type'] = 'text';
//文字字型類型
//$config['wm_font_path'] = 'C:\Windows\Fonts\vrinda.ttf';
//字型大小
$config['wm_font_size'] = '16';
//字型顔色
$config['wm_font_color'] = 'ff0000';
//垂直方向距離頂端距離
$config['wm_vrt_alignment'] = '20';
//水準方向距離左端距離
$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 '';
}
}
/**
* 處理圖檔上傳
* 檔案上傳類 通過前台 上傳檔案
*/
public function uploadfile(){
//檔案上傳部分
// 處理檔案
// $data = '';
$this->load->helper('url');
$formpic = key($_FILES);
//檔案處理部分
if(false === empty($_FILES[$formpic]['tmp_name'])){
//設定檔案上傳的路徑
$upload['upload_path'] = "./public/img/";
//限制檔案上傳的類型
$upload['allowed_types'] = 'jpeg|jpg|gif|png';
//限制檔案上傳的大小
$upload['max_size'] = 2048;
//設定檔案上傳的路徑
$upload['file_name'] = date('YmdHis', time()).rand(10000, 99999);
//加載檔案上傳配置資訊
$this->load->library('upload', $upload);
//處理檔案上傳
$this->upload->do_upload($formpic);
//傳回檔案上傳資訊
$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);
//傳回檔案上傳名字
$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 = '';
//生成縮略圖名稱
$pos = strripos($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);
//上傳失敗
if(!$data){
echo json_encode(array('status'=>0,'msg'=>"上傳失敗！"));
}else{
//上傳成功
echo json_encode(array(
'name'=>$data,
'pic'=>base_url()."public/img/".$data,
'picthumb'=>$thumbdata == '' ?$data:$thumbdata
));
}
}
下面是前端的基本html代碼：
<!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" target="_blank" rel="external nofollow" />
<link rel="stylesheet" href="/public/stylesheets/bootstrap-responsive.min.css" target="_blank" rel="external nofollow" />
<link rel="stylesheet" href="/public/stylesheets/matrix-style.css" target="_blank" rel="external nofollow" />
<link rel="stylesheet" href="/public/stylesheets/matrix-media.css" target="_blank" rel="external nofollow" />
<script type="text/javascript" src="/public/javascripts/jquery.min.js"></script>
<script type="text/javascript" src="/public/javascripts/jquery.form.js"></script>
<script type="text/javascript" src="/public/javascripts/jquery.validate.js"></script>
<style type="text/css">
body{background:#eeeeee; margin:0px;}
</style>
</head>
<body>
<div class="control-group">
<label class="control-label"> 分享logo： </label>
<div class="controls">
<input type="file" name="sharepic" id="sharepic"/>
<input type="hidden" name="act_sharepic" value="" id="act_sharepic"/>(<sapn class="fred">最佳大小為 80 X 80 像素</sapn>)
<p style="margin:20px 0;"><img src="/public/img/default.png" alt="" id="sharepic_img"></p>
</div>
</div>
<script type="text/javascript">
$(function () {
/*****************圖檔上傳部分開始 *******************/
var act = "<form class='myupload' 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;
//更改預覽圖像位址
$('#sharepic_img').attr("src",src);
$('#act_sharepic').val(data.name);
$('#sharepic').unwrap();
},
error:function(xhr){
alert(JSON.parse(xhr));
}
});
});
})
</script>
</body>
</html>
![第六章 層的濾鏡[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)