Symfony2 use a third-party library Upload to create an image Upload instance _ php instance

This article mainly introduces how Symfony2 uses a third-party library Upload to Upload images, and analyzes in detail the steps and skills of Symfony2 using a third-party library Upload Based on the instance form, for more information about how to use the third-party library Upload to Upload images, see the example in this article. We will share this with you for your reference. The details are as follows:

We generally have the Avatar setting function in personal data of applications or websites. In this chapter, we use a third-party Upload library in Symfony2 to create and Upload images.

1. install third-party Libraries

1. Add "require" in the composer. json File

"codeguy/upload": "*"

2. run commands to install

composer update

Ii. Encoding

1. Compile the uploadPic method to upload an image and use the user ID of the uploaded image as the file name.

<? Php/*** @ author Sun * By blogs.zmit.cn http://blogs.zmit.cn * Original works can be reproduced. During reprinting, you must mark the original source of the article in hyperlink form. http://blogs.zmit.cn /6544.html * The author information and this statement of the dream blog. Otherwise, legal liability will be held. */Namespace ZM \ AdminBundle \ Controller; use Symfony \ Bundle \ FrameworkBundle \ Controller; use Symfony \ Component \ Filesystem; class DefaultController extends Controller {public function indexAction ($ name) {return $ this-> render ('zmadminbundle: Default: index.html. twig ', array ('name' => $ name);}/*** upload image ** @ param type $ user_id user id, used as the file name * @ param type $ str name of the file type input in the form * @ Param type $ path: Save path * @ return type */public function uploadPic ($ user_id, $ str, $ path) {$ fs = new Filesystem (); // check whether the path exists if (! $ Fs-> exists ($ path) {// if not, create the directory $ fs-> mkdir ($ path, 0700 );} // use the Upload library $ storage = new \ Upload \ Storage \ FileSystem ($ path); $ file = new \ Upload \ File ($ str, $ storage ); // if the file name is empty, if ($ file-> getName ()! = '') {// Set the file name to the user's id $ file-> setName ($ user_id ); // verify the file Upload $ file-> addValidations (array (// specify the file type new \ Upload \ Validation \ Mimetype (array ('image/png ', 'image/jpg ', 'image/jpeg ', 'image/gif'), // specify the file Size new \ Upload \ Validation \ Size ('2 m '))); // upload the file try {// success $ file-> upload (); // file name and extension $ file_name = $ file-> getNameWithExtension ();} catch (\ Exception $ e) {// failed! $ Errors = $ file-> getErrors () ;}// return the file name and extension return $ file_name ;}}

2. the user uploads the Avatar and saves it to the database table in the full path.

<? Php/*** contact controller * @ author Sun * By blogs.zmit.cn http://blogs.zmit.cn * Original works can be reproduced. During reprinting, you must mark the original source of the article in hyperlink form. http://blogs.zmit.cn /6544.html * The author information and this statement of the dream blog. Otherwise, legal liability will be held. */Namespace ZM \ ApiBundle \ Controller; // reference the Controller of the uploaded image method uploadPic and name it BaseControlleruse ZM \ AdminBundle \ Controller \ defacontroller Controller AS BaseController; use Symfony \ Component \ HttpFoundation \ Request; use Symfony \ Component \ HttpFoundation \ Response; // inherit BaseControllerclass ContactController extends BaseController {/*** upload profile picture ** @ return Response */public function uploadHeadAction () {$ request = Req Uest: createFromGlobals ()-> request; $ user_id = $ request-> get ('user _ id '); // determine whether a file has been uploaded if (isset ($ _ FILES ['head']) & $ _ FILES ['head']! = '') {$ Conn = $ this-> getDoctrine ()-> getConnection (); $ data = $ conn-> fetchAssoc (" SELECT id, head FROM contact WHERE id =? LIMIT 1 ", array ($ user_id); // determines whether the user has if (! Empty ($ data ['id']) {// sets the image storage path $ path = 'image/head /'; // get the file name and extension $ file_name = $ this-> uploadPic ($ user_id, 'head', $ path) returned after the file is uploaded ); // modify the head avatar field of the user contact table $ conn-> executeUpdate ("UPDATE contact SET head =? WHERE id =? ", Array ($ path. $ file_name, $ user_id); $ result ['flag'] = 1; $ result ['content'] = 'the Avatar is uploaded successfully! ';} Else {$ result ['flag'] = 3; $ result ['content'] = 'user does not exist! ';}} Else {$ result ['flag'] = 2; $ result ['content'] =' Upload Failed. No image is selected! ';} Return new Response (json_encode ($ result), '000000', array ('content-type' => 'application/json '));}}

In this way, the image is uploaded successfully, the user id is used as the file name, and the table field value is changed to the full path of the image.

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