PHP code example of harmstyler / contrast-ratio-calculator

1. Go to this page and download the library: Download harmstyler/contrast-ratio-calculator library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

harmstyler / contrast-ratio-calculator example snippets




use HarmsTyler\ContrastRatioCalculator\Color;
use HarmsTyler\ContrastRatioCalculator\ContrastRatio;
use HarmsTyler\ContrastRatioCalculator\WCAGContrastRating;

$primaryColor = new Color();
$primaryColor->setHex('#ffffff');
$secondaryColor = new Color();
$secondaryColor->setHex('#000000');

$contrastRatio = new ContrastRatio($primaryColor, $secondaryColor);

echo $contrastRatio->getRatio(); // floating decimal point of calculated ratio

$rating = new WCAGContrastRating();
echo $rating->rateContrastRatio($contrastRatio); // the WCAGContrast grade, either 'fail', 'aa-large', 'aa', or 'aaa'