PHP

convert png to webp in php

// get png in question

$pngimg = imagecreatefrompng($file);

// get dimens of image

$w = imagesx($pngimg);
$h = imagesy($pngimg);;

// create a canvas

$im = imagecreatetruecolor ($w, $h);
imageAlphaBlending($im, false);
imageSaveAlpha($im, true);

// By default, the canvas is black, so make it transparent

$trans = imagecolorallocatealpha($im, 0, 0, 0, 127);
imagefilledrectangle($im, 0, 0, $w - 1, $h - 1, $trans);

// copy png to canvas

imagecopy($im, $pngimg, 0, 0, 0, 0, $w, $h);

// lastly, save canvas as a webp

imagewebp($im, str_replace('png', 'webp', $file));

// done

imagedestroy($im);

png and jpg convert webp using php

1 function create_webp_image($image_path) {
2         $image_properties   = @getimagesize($image_path);
3         $image_info         = pathinfo($image_path);
4         $image_type         = $image_properties[2];
5         switch ($image_type) {
6             case 1:
7                 $img  = @imagecreatefromgif($image_path);
8                 break;
9             case 2:
10                $img  = @imagecreatefromjpeg($image_path);
11                break;
12            case 3:
13                $img  = @imagecreatefrompng($image_path);
14                break;
15        }
16        $new_path   = $image_info['dirname'].'/'.$image_info['filename'].'.webp';
17        $this->log->debug("image_properties", json_encode($image_properties, JSON_PRETTY_PRINT));
18        $this->log->debug("image_info", json_encode($image_info, JSON_PRETTY_PRINT));
19        $this->log->debug("img", $img);
20        $this->log->debug("new_path", $new_path);
21        $webp = imagewebp($img, $new_path);  // with or without (..., quality= int)
22        $this->log->debug("webp", $webp);
23        imagedestroy($img);
24    }