CI framework file upload and image processing Usage Analysis, ci File Upload

CI framework file upload and image processing Usage Analysis, ci File Upload

This document describes the CI framework file upload and image processing usage. We will share this with you for your reference. The details are as follows:

// List page banner image public function edit_list_page_banner ($ category_id = "") {$ category_id = empty ($ category_id )? $ _ POST ["category_id"]: $ category_id; // upload an image if (isset ($ _ POST ["key"]) & $ _ POST ["key"] = "upload") {/* 1. set_upload_path */$ config ['upload _ path'] = ". /upload/source /". date ("Y/m/d"); // if (! File_exists (". /upload/source /". date ("Y/m/d") {mkdir (". /upload/source /". date ("Y/m/d"), 0777, true); // source image path} if (! File_exists (". /upload/big_thumb /". date ("Y/m/d") {mkdir (". /upload/big_thumb /". date ("Y/m/d"), 0777, true); // large thumbnail path} if (! File_exists (". /upload/small_thumb /". date ("Y/m/d") {mkdir (". /upload/small_thumb /". date ("Y/m/d"), 0777, true ); // small thumbnail path} $ config ['allowed _ types '] = "gif | jpg | png | txt "; // file type $ config ['max _ size'] = "20000"; // maximum upload size $ this-> load-> library ("upload", $ config ); if ($ this-> upload-> do_upload ('userfile') // name = "userfile" in the form {// After the upload is successful, generate two thumbnails $ data = $ this-> upload-> data (); // return the information of the uploaded image $ this-> load-> library ("image_lib "); // load the image processing class library // The first method: Large thumbnail Configuration Parameter/* $ config_big_thumb ['image _ library'] = 'gd2 '; // gd2 Gallery $ config_big_thumb ['source _ image'] = $ data ['full _ path']; // source image $ config_big_thumb ['new _ image'] = ". /upload/big_thumb /". date ("Y/m/d "). "/". $ data ['file _ name']; // large thumbnail $ config_big_thumb ['create _ thumb'] = true; // create a thumbnail $ config_big_thumb ['maintain _ ratio '] = true; $ config_big_thumb ['width'] = 300; // width of the thumbnail $ config_big_thumb ['height'] = 300; // height of the thumbnail $ config_big_thumb ['thumb _ marker'] = "_ 300_300 "; // Add "_ 300_300" after the thumbnail name to indicate a 300*300 thumbnail * // The second one: configuration parameters for large thumbnails/* $ config_big_thumb = array ('image _ library' => 'gd2 ', // gd2 gallery 'source _ image' => $ data ['full _ path'], // source image 'new _ image' => ". /upload/big_thumb /". date ("Y/m/d "). "/". $ data ['file _ name'], // large thumbnail 'create _ thumb' => true, // whether to create a thumbnail 'maintain _ ratio '=> true, 'width' => 300, // The width of the thumbnail 'height' => 300, // The height of the thumbnail 'thumb _ marker' => "_ 300_300" // Add "_ 300_300" after the thumbnail name to indicate a 300*300 thumbnail ); * // method 3: add some configuration information to config. $ config_big_thumb = $ this-> config-> item ("config_big_thumb"); $ config_big_thumb ['source _ image'] = $ data ['full _ path']; $ config_big_thumb ['new _ image'] = ". /upload/big_thumb /". date ("Y/m/d "). "/". $ data ['file _ name']; // Configuration Parameter for small thumbnails/* $ config_small_thumb ['image _ library'] = 'gd2 '; // gd2 Gallery $ config_small_thumb ['source _ image'] = $ data ['full _ path']; // source image $ config_small_thumb ['new _ image'] = ". /upload/small_thumb /". date ("Y/m/d "). "/". $ data ['file _ name']; // large thumbnail $ config_small_thumb ['create _ thumb'] = true; // create a thumbnail $ config_small_thumb ['maintain _ ratio '] = true; $ config_small_thumb ['width'] = 100; // width of the thumbnail $ config_small_thumb ['height'] = 100; // height of the thumbnail $ config_small_thumb ['thumb _ marker'] = "_ 100_100 "; // Add "_ 100_100" to the thumbnail name ", it can represent a 100*100 thumbnail * // Configuration Parameter for a small thumbnail $ config_small_thumb = array ('image _ library' => 'gd2 ', // gd2 gallery 'source _ image' => $ data ['full _ path'], // source image 'new _ image' => ". /upload/small_thumb /". date ("Y/m/d "). "/". $ data ['file _ name'], // large thumbnail 'create _ thumb' => true, // whether to create a thumbnail 'maintain _ ratio '=> true, 'width' => 100, // The width of the thumbnail 'height' => 100, // The height of the thumbnail 'thumb _ marker' => "_ 100_100" // Add "_ 300_300" after the thumbnail name to indicate a 300*300 thumbnail ); // $ this-> load-> library ("image_lib", $ config_thumb); $ this-> image_lib-> initialize ($ config_big_thumb ); $ this-> image_lib-> resize (); // generate a big thumbnail $ this-> image_lib-> initialize ($ config_small_thumb); $ this-> image_lib-> resize (); // generate small thumbnails // Insert the database $ data_array = array ('category _ id' => $ category_id, 'pic _ url' => ". /upload/source /". date ("Y/m/d "). "/". $ data ['file _ name'], 'addtime' => time (), 'is _ stop' => 1, 'sort '=> 0, 'Gender' => $ _ POST ["gender"], 'link _ url' => $ _ POST ["link_url"], 'User _ id' => intval ($ this-> cur_user ['user _ id']); $ this-> category_model-> add_category_banner ($ data_array );}} $ con_arr [] = "category_id = '{$ category_id}'"; if ($ gender = '') {$ gender = 0 ;} $ con_arr [] = "gender = '{$ gender}'"; $ condition = implode ('and', $ con_arr ); $ banner_list = $ this-> category_model-> get_banner_all ($ condition); $ this-> tp-> assign ('banner _ list', $ banner_list ); $ this-> tp-> assign ('base _ url', base_url (); $ this-> tp-> assign ('gender', $ gender ); $ this-> tp-> assign ('category _ id', $ category_id); $ this-> tp-> display ("category/edit_list_page_banner.php ");}

Configuration items related to thumbnails In the config. php file:

// Configuration Parameter $ config_big_thumb = array ('image _ library' => 'gd2', // gd2 gallery 'create _ thumb' => true, // whether to create a thumbnail 'maintain _ ratio '=> true, 'width' => 300, // The thumbnail width 'height' => 300, // The height of the thumbnail 'thumb _ marker' => "_ 300_300" // Add "_ 300_300" after the thumbnail name to indicate a 300*300 thumbnail );