Overcomer Overcomer - 14 days ago 7
PHP Question

Laravel 5 - Using Package inside helpers.php

I have this

ColorThief\ColorThief
package that works well inside a controller.

However, I want to create a function
getImageColor($imgName)
in
helper.php
to consume
ColorThief\ColorThief
so I can use
getImageColor($imgName)
directly from views.

How can I access
ColorThief\ColorThief
from inside
helper.php
.




use ColorThief\ColorThief;

function getImageColor($img='') {
if(!empty($img)) {
$upload_path = public_path() . '/uploads/'.$img;
if(file_exists($upload_path)) {
return ColorThief::getColor($upload_path);
}
}
return false;
}


When I call
getImageColor('image.jpg')
, I get the following error:

htmlspecialchars() expects parameter 1 to be string, array given (View: /home/userxyz/public_html/dev/resources/views/welcome.blade.php)

Please note that when
ColorThief::getColor($upload_path);
is used inside a controller, it works perfectly
.

Answer

In your helper.php you can use it like this:

use ColorThief\ColorThief;

function getImageColor($sourceImage)
{
    return ColorThief::getColor($sourceImage);
}

The $sourceImage variable must contain either the absolute path of the image on the server, a URL to the image, a GD resource containing the image, an Imagick image instance, a Gmagick image instance, or an image in binary string format. Package Github Repository.

Update:

This function returns an array of three integer values, corresponding to the RGB values (Red, Green & Blue) of the dominant color. Example: array(r: num, g: num, b: num)

Further to convert the RGB to HEX you may use the following function:

function rgb2hex($rgb)
{
    $hex .= str_pad(dechex($rgb[0]), 2, "0", STR_PAD_LEFT);
    $hex .= str_pad(dechex($rgb[1]), 2, "0", STR_PAD_LEFT);
    $hex .= str_pad(dechex($rgb[2]), 2, "0", STR_PAD_LEFT);
    return "#".$hex;
}

For example:

$color = rgb2hex(getImageColor($sourceImage)); // #ffffff for white
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