Laravel / Intervention Image Class - class not found

Question 1

I just installed Intervention Image Class following instructions from here: http://image.intervention.io/getting_started/installation

I also added these 2 lines into config/app.php file:

'InterventionImageImageServiceProvider'

'Image' => 'InterventionImageFacadesImage'

When I open my website, i get this error:

Class 'InterventionImageImageServiceProvider' not found

Why is that and what should I do now?

Question 2

Step 1:

Add "intervention/image": "dev-master" to the “require” section of your composer.json file.

"require": {
    "laravel/framework": "4.1.*",
    "intervention/image": "dev-master"
},

Step 2:

Run CMD;
$ composer install

If you've got this warning:

Warning: The lock file is not up to date with the latest changes in composer.json. You may be getting outdated dependencies. Run update to update them.

do $ composer update and then $ composer install

Step 3:

open the config/app.php file. Add this to the $providers array.

InterventionImageImageServiceProvider::class

Step 4:

Next add this to the $aliases array.

'Image' => InterventionImageFacadesImage::class

Step 5:

If there is an error;

Class 'InterventionImageImageServiceProvider' not found

try

$ composer update

Question 3

If you upgraded to 8 from a previous version you are probably missing the autoload directive for the DatabaseFactories namespace in composer.json:

"autoload": {
    "psr-4": {
        "App\": "app/",
        "Database\Factories\": "database/factories/",
        "Database\Seeders\": "database/seeders/"
    }
},

You can also remove the classmap part, since it is no longer needed.

Run composer dump after making these changes.

Laravel 8.x Docs - Upgrade Guide - Database - Seeder and Factory Namespace

Question 4

Try the imagecopyresized function,
which is built in,
need not to re-compile (your share hosting will be happy),
and provide almost simple feature for image processing

Jquery is clients javascript library,
it does not help with image processing

Question 5

I believe I know the reason now.

The new class MemberInvitationSeeder wasn't in the autoloaded classes in the composer.json file.

It wasn't there because I added that class manually.

Now, going forward, if I add such classes again, what should I use in order for my class to automatically to the autoloader?

Question 6

To my knowledge, you can’t resize the image before uploading it. (I could be wrong!) However, when you upload the image it goes into a temporary file. You can resize the temporary image and copy the resized image to its final destination.

This code was adapted from a snippet at FliquidStudios: Resizing images in PHP with GD and Imagick.

Since (it seems) you want to keep the width constant, you don’t really need to do a lot of ratio tests.

Update:

You should be able to simply use this in place of your original code. Most of it is unchanged.

<?php

// resizes an image to fit a given width in pixels.
// works with BMP, PNG, JPEG, and GIF
// $file is overwritten
function fit_image_file_to_width($file, $w, $mime = 'image/jpeg') {
    list($width, $height) = getimagesize($file);
    $newwidth = $w;
    $newheight = $w * $height / $width;

    switch ($mime) {
        case 'image/jpeg':
            $src = imagecreatefromjpeg($file);
            break;
        case 'image/png';
            $src = imagecreatefrompng($file);
            break;
        case 'image/bmp';
            $src = imagecreatefromwbmp($file);
            break;
        case 'image/gif';
            $src = imagecreatefromgif($file);
            break;
    }

    $dst = imagecreatetruecolor($newwidth, $newheight);
    imagecopyresampled($dst, $src, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);

    switch ($mime) {
        case 'image/jpeg':
            imagejpeg($dst, $file);
            break;
        case 'image/png';
            imagealphablending($dst, false);
            imagesavealpha($dst, true);
            imagepng($dst, $file);
            break;
        case 'image/bmp';
            imagewbmp($dst, $file);
            break;
        case 'image/gif';
            imagegif($dst, $file);
            break;
    }

    imagedestroy($dst);
}

// init file vars
$pic  = $_FILES['photo']['name'];
$target = 'uploads/' . basename( $_FILES['photo']['name']);
$temp_name = $_FILES['photo']['tmp_name'];
$type = $_FILES["photo"]["type"];

// Connects to your Database 
mysql_connect("hostname", "username", "password") or die(mysql_error()) ; 
mysql_select_db("database") or die(mysql_error()) ; 

// get form data
$name = mysql_real_escape_string(isset($_POST['name']) ? $_POST['name'] : 'No name');

//Writes the information to the database 
mysql_query("INSERT INTO `table` (name, photo) VALUES ('$name','$pic')") ; 

// resize the image in the tmp directorys
fit_image_file_to_width($temp_name, 200, $type);

//Writes the photo to the server
if(move_uploaded_file($temp_name, $target)) {

    //Tells you if its all ok 
    echo "The file ". basename( $_FILES['photo']['name'] ). " has been uploaded"; 

} else {

    //Gives and error if its not 
    echo "Sorry, there was a problem uploading your file."; 

}

?>