I installed this extension using composer , but Yii2 cannot find the Class when i try to use it , what is the problem? about yii2-imagine HOT 10 CLOSED

have you included the composer autoloader in your project? should be included in the index.php file. (#6)

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this is my index.php file , is there anything i have missed? or there is anything is worry ?

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can you show the ouput of composer show -i should be a list of installed packages.

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i can see this package in my composer , but the issue is always here. what is my problem?

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the imagine/imagine package seems to be not installed. you should try to run composer update again and see if there are any errors.

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Hello! I have the same problem. The package is installed but yii autoloader can't find the class.
Class Imagine\Gd\Imagine not found

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@empoower please paste the complete output of composer show -i.

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@cebe
asofter/yii2-imperavi-redactor dev-master 087ab0e Imperavi Redactor WYSIWYG widget (OEM-licensed for Yii 2)
bower-asset/ace-builds v1.1.9
bower-asset/admin-lte v2.3.0 Admin dashboard and control panel template
bower-asset/blueimp-canvas-to-blob 2.2.0 JavaScript Canvas to Blob is a function to convert canvas elements ...
bower-asset/blueimp-file-upload 9.7.2 File Upload widget with multiple file selection, drag&drop supp...
bower-asset/blueimp-load-image 1.14.0 JavaScript Load Image is a library to load images provided as File ...
bower-asset/blueimp-tmpl 2.5.5 < 1KB lightweight, fast & powerful JavaScript templating engine wit...
bower-asset/bootstrap v3.3.5 The most popular front-end framework for developing responsive, mob...
bower-asset/eonasdan-bootstrap-datetimepicker 4.17.37 bootstrap3 datetimepicker
bower-asset/flot v0.8.3
bower-asset/font-awesome v4.4.0 Font Awesome
bower-asset/html5shiv 3.7.3
bower-asset/jquery 2.1.4
bower-asset/jquery-slimscroll v1.3.6 slimScroll is a small jQuery plugin that transforms any div into a ...
bower-asset/jquery-ui 1.11.4
bower-asset/jquery.inputmask 3.1.63 jquery.inputmask is a jquery plugin which create an input mask.
bower-asset/moment 2.10.6
bower-asset/moment-timezone 0.4.0 Parse and display moments in any timezone.
bower-asset/punycode v1.3.2
bower-asset/typeahead.js v0.10.5
bower-asset/yii2-pjax v2.0.4
cebe/markdown 1.1.0 A super fast, highly extensible markdown parser for PHP
codeception/codeception 2.1.3 BDD-style testing framework
doctrine/instantiator 1.0.5 A small, lightweight utility to instantiate objects in PHP without ...
ezyang/htmlpurifier v4.6.0 Standards compliant HTML filter written in PHP
facebook/webdriver 1.0.2 A PHP client for WebDriver
fzaninotto/faker v1.5.0 Faker is a PHP library that generates fake data for you.
guzzlehttp/guzzle 6.1.0 Guzzle is a PHP HTTP client library
guzzlehttp/promises 1.0.2 Guzzle promises library
guzzlehttp/psr7 1.2.0 PSR-7 message implementation
imagine/imagine v0.5.0 Image processing for PHP 5.3
intervention/image 2.3.2 Image handling and manipulation library with support for Laravel in...
kartik-v/bootstrap-fileinput v4.2.7 An enhanced HTML 5 file input for Bootstrap 3.x with features for f...
kartik-v/bootstrap-star-rating v3.5.4 A simple yet powerful JQuery star rating plugin for Bootstrap.
kartik-v/dependent-dropdown v1.4.3 A multi level dependent dropdown JQuery plugin that allows nested d...
kartik-v/mpdf v1.0.2 A PHP class to generate PDF files from HTML with Unicode/UTF-8 and ...
kartik-v/yii2-export dev-master 69b9fab A library to export server/db data in various formats (e.g. excel, ...
kartik-v/yii2-grid v3.0.7 Yii 2 GridView on steroids. Various enhancements and utilities for ...
kartik-v/yii2-krajee-base v1.7.7 Base library and foundation components for all Yii2 Krajee extensions.
kartik-v/yii2-money v1.2.1 An advanced money mask input for Yii 2.0 based on jquery maskmoney ...
kartik-v/yii2-mpdf dev-master f65fe85 A Yii2 wrapper component for the mPDF library which generates PDF f...
kartik-v/yii2-widget-activeform v1.4.4 Enhanced Yii2 active-form and active-field with full bootstrap styl...
kartik-v/yii2-widget-affix v1.0.0 A scrollspy and affixed enhanced navigation to highlight page secti...
kartik-v/yii2-widget-alert v1.1.0 A widget to generate alert based notifications using bootstrap-aler...
kartik-v/yii2-widget-colorinput v1.0.0 An enhanced Yii 2 widget encapsulating the HTML 5 color input (sub ...
kartik-v/yii2-widget-datepicker v1.3.3 Enhanced Yii2 wrapper for the bootstrap datepicker plugin (sub repo...
kartik-v/yii2-widget-datetimepicker v1.4.0 Enhanced Yii2 wrapper for the bootstrap datetimepicker plugin (sub ...
kartik-v/yii2-widget-depdrop v1.0.2 Widget that enables setting up dependent dropdowns with nested depe...
kartik-v/yii2-widget-fileinput v1.0.3 An enhanced FileInput widget for Bootstrap 3.x with file preview, m...
kartik-v/yii2-widget-growl v1.1.1 A widget to generate growl based notifications using bootstrap-grow...
kartik-v/yii2-widget-rangeinput v1.0.0 An enhanced Yii 2 widget encapsulating the HTML 5 range input (sub ...
kartik-v/yii2-widget-rating v1.0.0 A Yii2 widget for the simple yet powerful bootstrap-star-rating plu...
kartik-v/yii2-widget-select2 v2.0.3 Enhanced Yii2 wrapper for the Select2 jQuery plugin (sub repo split...
kartik-v/yii2-widget-sidenav v1.0.0 An enhanced side navigation menu styled for bootstrap (sub repo spl...
kartik-v/yii2-widget-spinner v1.0.0 A widget to render animated CSS3 loading spinners with VML fallback...
kartik-v/yii2-widget-switchinput v1.3.0 A Yii2 wrapper widget for the Bootstrap Switch plugin to use checkb...
kartik-v/yii2-widget-timepicker v1.0.0 Enhanced Yii2 wrapper for the bootstrap timepicker plugin (sub repo...
kartik-v/yii2-widget-touchspin v1.2.0 A Yii2 wrapper widget for the Bootstrap Switch plugin to use checkb...
kartik-v/yii2-widget-typeahead v1.0.1 Enhanced Yii2 wrapper for the Twitter Typeahead plugin (sub repo sp...
kartik-v/yii2-widgets dev-master b7eb849 Collection of useful widgets for Yii Framework 2.0 extending functi...
league/flysystem 1.0.15 Filesystem abstraction: Many filesystems, one API.
league/glide 0.3.5 Wonderfully easy on-demand image manipulation library with an HTTP ...
league/tactician v0.6.1 A small, flexible command bus. Handy for building service layers.
league/url 3.3.5 League/url is a lightweight PHP Url manipulating library
mihaildev/yii2-elfinder 1.1.3 Yii2 ElFinder
phpdocumentor/reflection-docblock 2.0.4
phpmailer/phpmailer v5.2.6 PHPMailer is a full-featured email creation and transfer class for PHP
phpoffice/phpexcel 1.8.1 PHPExcel - OpenXML - Read, Create and Write Spreadsheet documents i...
phpspec/php-diff v1.0.2 A comprehensive library for generating differences between two hash...
phpspec/prophecy v1.5.0 Highly opinionated mocking framework for PHP 5.3+
phpunit/php-code-coverage 2.2.3 Library that provides collection, processing, and rendering functio...
phpunit/php-file-iterator 1.4.1 FilterIterator implementation that filters files based on a list of...
phpunit/php-text-template 1.2.1 Simple template engine.
phpunit/php-timer 1.0.7 Utility class for timing
phpunit/php-token-stream 1.4.8 Wrapper around PHP's tokenizer extension.
phpunit/phpunit 4.8.10 The PHP Unit Testing framework.
phpunit/phpunit-mock-objects 2.3.8 Mock Object library for PHPUnit
psr/http-message 1.0 Common interface for HTTP messages
psr/log 1.0.0 Common interface for logging libraries
rmrevin/yii2-postman 2.2.4 Mail module for Yii2.
sebastian/comparator 1.2.0 Provides the functionality to compare PHP values for equality
sebastian/diff 1.3.0 Diff implementation
sebastian/environment 1.3.2 Provides functionality to handle HHVM/PHP environments
sebastian/exporter 1.2.1 Provides the functionality to export PHP variables for visualization
sebastian/global-state 1.0.0 Snapshotting of global state
sebastian/recursion-context 1.0.1 Provides functionality to recursively process PHP variables
sebastian/version 1.0.6 Library that helps with managing the version number of Git-hosted P...
swiftmailer/swiftmailer v5.4.1 Swiftmailer, free feature-rich PHP mailer
symfony/browser-kit v2.7.5 Symfony BrowserKit Component
symfony/console v2.7.5 Symfony Console Component
symfony/css-selector v2.7.5 Symfony CssSelector Component
symfony/debug v2.7.5 Symfony Debug Component
symfony/dom-crawler v2.7.5 Symfony DomCrawler Component
symfony/event-dispatcher v2.7.5 Symfony EventDispatcher Component
symfony/finder v2.7.5 Symfony Finder Component
symfony/http-foundation v2.7.5 Symfony HttpFoundation Component
symfony/http-kernel v2.7.5 Symfony HttpKernel Component
symfony/yaml v2.7.5 Symfony Yaml Component
trntv/cheatsheet 0.1 Cheat sheet of knowledge you may use in your code
trntv/probe 0.2.1 System information provider
trntv/yii2-aceeditor 2.0.0 Yii2 ajax.org Ace Editor widget
trntv/yii2-bootstrap-datetimepicker 1.5.0 Datetimepicker widget for Yii2 framework
trntv/yii2-file-kit 1.1.5 Yii2 file upload and storage kit
trntv/yii2-glide 1.0.0 Yii2 Glide Extension
trntv/yii2-tactician 0.1.1 A simple, flexible command bus. This package provide it's integrati...
true/punycode v2.0.1 A Bootstring encoding of Unicode for Internationalized Domain Names...
vlucas/phpdotenv v2.0.1 Loads environment variables from .env to getenv(), $_ENV and ...
yiisoft/yii2 dev-master 38a7f24 Yii PHP Framework Version 2
yiisoft/yii2-authclient 2.0.5 External authentication via OAuth and OpenID for the Yii framework
yiisoft/yii2-bootstrap 2.0.5 The Twitter Bootstrap extension for the Yii framework
yiisoft/yii2-codeception 2.0.4 The Codeception integration for the Yii framework
yiisoft/yii2-composer 2.0.3 The composer plugin for Yii extension installer
yiisoft/yii2-debug 2.0.5 The debugger extension for the Yii framework
yiisoft/yii2-faker 2.0.3 Fixture generator. The Faker integration for the Yii framework.
yiisoft/yii2-gii 2.0.4 The Gii extension for the Yii framework
yiisoft/yii2-imagine 2.0.3 The Imagine integration for the Yii framework
yiisoft/yii2-jui 2.0.4 The Jquery UI extension for the Yii framework
yiisoft/yii2-swiftmailer 2.0.4 The SwiftMailer integration for the Yii framework
zxbodya/yii2-gallery-manager dev-master 363f712 Extension for yii, that allows to manage image galleries

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@empoower #8 (comment)

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Everything works fine now. I deleted all files in vendor and reload via composer.

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