Created
March 14, 2024 22:04
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PHP convert to WEBP
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| <?php | |
| /** | |
| * Generate Webp image format | |
| * | |
| * Uses either Imagick or imagewebp to generate webp image | |
| * | |
| * @param string $file Path to image being converted. | |
| * @param int $compression_quality Quality ranges from 0 (worst quality, smaller file) to 100 (best quality, biggest file). | |
| * | |
| * @return false|string Returns path to generated webp image, otherwise returns false. | |
| */ | |
| function jcphp01_generate_webp_image($file, $compression_quality = 80) | |
| { | |
| // check if file exists | |
| if (!file_exists($file)) { | |
| return false; | |
| } | |
| // If output file already exists return path | |
| $output_file = $file . '.webp'; | |
| if (file_exists($output_file)) { | |
| return $output_file; | |
| } | |
| $file_type = strtolower(pathinfo($file, PATHINFO_EXTENSION)); | |
| if (function_exists('imagewebp')) { | |
| switch ($file_type) { | |
| case 'jpeg': | |
| case 'jpg': | |
| $image = imagecreatefromjpeg($file); | |
| break; | |
| case 'png': | |
| $image = imagecreatefrompng($file); | |
| imagepalettetotruecolor($image); | |
| imagealphablending($image, true); | |
| imagesavealpha($image, true); | |
| break; | |
| case 'gif': | |
| $image = imagecreatefromgif($file); | |
| break; | |
| default: | |
| return false; | |
| } | |
| // Save the image | |
| $result = imagewebp($image, $output_file, $compression_quality); | |
| if (false === $result) { | |
| return false; | |
| } | |
| // Free up memory | |
| imagedestroy($image); | |
| return $output_file; | |
| } elseif (class_exists('Imagick')) { | |
| $image = new Imagick(); | |
| $image->readImage($file); | |
| if ($file_type === 'png') { | |
| $image->setImageFormat('webp'); | |
| $image->setImageCompressionQuality($compression_quality); | |
| $image->setOption('webp:lossless', 'true'); | |
| } | |
| $image->writeImage($output_file); | |
| return $output_file; | |
| } | |
| return false; | |
| } |
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