require vendor autoload php failed to open stream

Question

I know that this issue has been posted many times  but for me it seems to be a different problem  Indeed  this error  Warning  require vendor autoload php   failed to open stream  No such file or directory in C  xampp htdocs site web send mail php on line 3 Fatal error  require    Failed opening required  vendor autoload php   include path  C  xampp php PEAR   in C  xampp htdocs site web send mail php on line 3  appears at the begining of my code from this line  require  vendor autoload php    So  I guess there must be a  vendor autoload php file somewhere in my computer  I have installed composer and ran composer require phpmailer phpmailer   So  I looked for this file using  dir  s autoload php in the Windows command line  and found one here  C  Windows SysWOW64 vendor autoload php  but for me  syswow64 folder has nothing to see with autoload php  I don t see what I am missing here

User · Answer

Change the auto prepend file property on php ini     Automatically add files before PHP document    http   php net auto-prepend-file  auto prepend file

User · Answer

Create composer json file with requisite library for ex          require              mpdf mpdf     6 1            Execute the below command where composer json exists   composer install   In case of Drupal    Use the web root folder of drupal to include autoload for ex   define  DRUPAL ROOT   getcwd     require once DRUPAL ROOT     vendor autoload php     In case of other systems  Use the root folder variable or location to include the autoload php

User · Answer

run composer update  That s it

User · Answer

What you re missing is running composer install  which will import your packages and create the vendor folder  along with the autoload script  Make sure your relative path is correct  For example the example scripts in PHPMailer are in examples   below the project root  so the correct relative path to load the composer autoloader from there would be    vendor autoload php  The autoload php you found in C  Windows SysWOW64 vendor autoload php is probably a global composer installation     where you ll usually put things like phpcs  phpunit  phpmd etc  composer update is not the same thing  and probably not what you want to use  If your code is tested with your current package versions then running update may cause breakages which may require further work and testing  so don t run update unless you have a specific reason to and understand exactly what it means  To clarify further     you should probably only ever run composer update locally  never on your server as it is reasonably likely to break apps in production  I often see complaints that people can t use composer because they can t run it on their server  e g  because it s shared and they have no shell access   In that case  you can still use composer  run it locally  an environment that has no such restrictions   and upload the local vendor folder it generates along with all your other PHP scripts  Running composer update also performs a composer install  and if you do not currently have a vendor folder  normal if you have a fresh checkout of a project   then it will create one  and also overwrite any composer lock file you already have  updating package versions tagged in it  and this is what is potentially dangerous  Similarly  if you do not currently have a composer lock file  e g  if it was not committed to the project   then composer install also effectively performs a composer update  It s thus vital to understand the difference between the two as they are definitely not interchangeable  It is also possible to update a single package by naming it  for example  composer update ramsey uuid  This will re-resolve the version specified in your composer json and install it in your vendor folder  and update your composer lock file to match  This is far less likely to cause problems than a general composer update if you just need a specific update to one package  It is normal for libraries to not include a composer lock file of their own  it s up to apps to fix versions  not the libraries they use  As a result  library developers are expected to maintain compatibility with a wider range of host environments than app developers need to  For example  a library might be compatible with Laravel 5  6  7  and 8  but an app using it might require Laravel 8 for other reasons  Composer 2 0  out soon  should remove any remaining inconsistencies between install and update results

User · Answer

This error occurs because of missing some files and the main reason is  Composer      First Run these commands in CMD  php -r  copy  https   getcomposer org installer    composer-setup php     php -r  if  hash file  sha384    composer-setup php        e0012edf3e80b6978849f5eff0d4b4e4c79ff1609dd1e613307e16318854d24ae64f26d17af3ef0bf7cfb710ca74755a     echo  Installer verified     else   echo  Installer corrupt   unlink  composer-setup php      echo PHP EOL   php composer-setup php php -r  unlink  composer-setup php       Then Create a New project Example   D  Laravel Projects New Project laravel new New Project   After that start the server using  php artisan serve

User · Answer

If you have cloned your project from Github or got it from somewhere else   you will encounter this error  That s because you are missing the vendor folder and other files  The vendor folder contains packages which are dependent to your project  The package dependencies are stored in composer json file and the folder was excluded while pushing to Github   Fix this error by simply running   composer install  Then you will get all the assets needed for your project

User · Answer

If you get the error also when you run   composer install   Just run this command first  composer dump-autoload   This command will clean up all compiled files and their paths

User · Answer

Proper autoload php configuration   A  Quick answer   Your autoload php path is wrong  ie  C  Windows SysWOW64 vendor autoload php To date  you need to change it to  C  Users  lt Windows User Name gt  vendor autoload php    B  Steps with example  We will take facebook php-graph-sdk as an example  change to Package Name as needed    Install composer exe Open CMD Prompt     R   type CMD Run This command  composer require facebook graph-sdk Include path in your PHP page  require once  C  Users  lt Windows User Name gt  vendor autoload php   Define configuration Secrets and Access Token for your package   etc  Happy codinig      C  Further details   Installing composer on windows will set this default path for your pacakges  you can find them there and include the autoloader path   C  Users  lt Windows User Name gt  vendor   For the same question you asked  the answer was this path for WAMP Server 64 BIT for Windows   Then simply in your PHP Application change this   require once   DIR       vendor autoload php      To   require once  C  Users  lt Windows User Name gt  vendor autoload php      Find your windows username under C  Users   Before all this  as pointed before in B    you need to run this command   composer require  lt package name gt    for facebook php SDK for example   composer require facebook graph-sdk     Thank you for asking this question  appreciated as it helped me fix similar issue and ended writing this simple tutorial

User · Answer

I had this path in my machine   C  xampp5 0 htdocs project-recordando-symfony project-recordando-symfony   Then I ran composer install or and composer update and it returned this error   ErrorException ZipArchive  extractTo      That error is because your path is too much long  I changed to   C  xampp5 0 htdocs p-symfony     and worked

User · Answer

For me  Just run this command first  composer dump-autoload   to add vendor folder   then run this command   composer update --no-scripts   to update composer

User · Answer

There will be a directory called  vendor  that needs to be in your root directory if you have a cloned repository and trying to set up that time this type of error occurring     gitingore  file has written code to not include vendor directory on GIT so after cloning GIT your project facing the issue of missing vendor directory    Once you add vendor directory your project will start working again

User · Answer

First  review route inside index php  require   DIR        vendor autoload php     app   require once   DIR        bootstrap app php     in my case the route did not work  I had to review the directories

User · Answer

Bashir almost helped me but I needed   composer update --no-scripts   I found the answer here  https   laracasts com discuss channels general-discussion fatal-error-class-illuminatefoundationapplication-not-found-in-pathtoprojectbootstrapappphp-on-line-14 page 0

User · Answer

In your project folder  the vendor folder is missing so you got this error      Warning  require vendor autoload php   failed to open stream  No such file or directory in   When you download the project through git  the project is downloaded without the vendor folder  You need  vendor because all your packages are there  including all the classes Laravel uses  The vendor directory contains your Composer dependencies   The solution is simple  Just run this command   composer update --no-scripts  composer update    composer update --no-scripts It will Skips execution of scripts defined in composer json file  composer update It will update your depencencies as they are specified in composer json file    With this command  you will re-create the vendor folder in your project and after that your project will start working normally

User · Answer

I was able to resolve by removing composer and reinstalling the proper way  Here is what I did    sudo apt remove composer sudo apt autoclean  amp  amp  sudo apt autoremove Installed globally with the instructions from  https   getcomposer org doc 00-intro md Download from  https   getcomposer org installer  global install  mv composer phar  usr local bin composer  Note  I had to move mine to mv composer phar  usr bin composer    I was then able to get composer install to work again  Found my answer at the bottom of this issue  https   github com composer composer issues 5510

User · Answer

First make sure you have installed the composer   composer install   If you already have installed then update the composer   composer update

[php] require(vendor/autoload.php): failed to open stream

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