Finds jpg and png files, creates webp files

webp-search-generate.php

<?php

if (!extension_loaded('gd') || !function_exists('gd_info')) {
	die("Missing gd!\n");
}

$gd = gd_info();
if (!$gd["WebP Support"]){
    die("webp not supported");
} 
    

$foldersToIgnore = ['img/tmp'];

$files = glob("{,*/,*/*/,*/*/*/}*.{jpg,png}", GLOB_BRACE);

foreach($files as $file){
    echo PHP_EOL;
    echo $file;
    $pathInfo = pathinfo($file);
    
    if(isIgnored($file, $foldersToIgnore)){
        echo "\t IGNORE";
        continue;
    }
    
    $webpPath = $pathInfo['dirname'].DIRECTORY_SEPARATOR.$pathInfo['filename'].".webp";
    if(file_exists($webpPath)){
        echo "\t WEBP_EXISTS=".(filesize($webpPath)/1000)."KB";
    }else{
        echo "\t TODO";
        if(convertImageToWebP($file, $webpPath )){
            echo "\t DONE=".(filesize($webpPath)/1000)."KB";
        }
    }
    
   
}
echo PHP_EOL;


function isIgnored($folder, $foldersToIgnore)
{
    $folder = rtrim($folder, DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR;
    foreach($foldersToIgnore as $ignore){
        if(substr($folder, 0, strlen($ignore)) == $ignore ){
            return true;
        }
    }
    
    return false;
}

function convertImageToWebP($source, $destination, $quality = 80) {
    
    $format = exif_imagetype ($source);
    
    switch($format){
        case 1:
            $image = imagecreatefromgif($source);
        break;
        case 2:
            $image = imagecreatefromjpeg($source);
        break;
        case 3:
            $image = imagecreatefrompng($source);
        break;
    }
   
    if($image){
        return imagewebp($image, $destination , $quality);
    }
}