PHP GD and WebP support:Normal WebP (VP8): supported since PHP 5.4Transparent WebP or alpha transparency (VP8X, VP8L): supported since PHP 7.0Animated WebP (VP8X): not supported at all.You can use the images from here https://developers.google.com/speed/webp/gallery2here https://ezgif.com/help/alternative-animated-image-formatsand here https://developers.google.com/speed/webp/gallery1Test with imagecreatefromwebp('your-image.webp'); and see the errors.You can detect animated or transparent webp using this code.<?php/** * Get WebP file info. * * @link https://www.php.net/manual/en/function.pack.php unpack format reference. * @link https://developers.google.com/speed/webp/docs/riff_container WebP document. * @param string $file * @return array|false Return associative array if success, return `false` for otherwise. */function webpinfo($file) { if (!is_file($file)) { return false; } else { $file = realpath($file); } $fp = fopen($file, 'rb'); if (!$fp) { return false; } $data = fread($fp, 90); fclose($fp); unset($fp); $header_format = 'A4Riff/' . // get n string 'I1Filesize/' . // get integer (file size but not actual size) 'A4Webp/' . // get n string 'A4Vp/' . // get n string 'A74Chunk'; $header = unpack($header_format, $data); unset($data, $header_format); if (!isset($header['Riff']) || strtoupper($header['Riff']) !== 'RIFF') { return false; } if (!isset($header['Webp']) || strtoupper($header['Webp']) !== 'WEBP') { return false; } if (!isset($header['Vp']) || strpos(strtoupper($header['Vp']), 'VP8') === false) { return false; } if ( strpos(strtoupper($header['Chunk']), 'ANIM') !== false || strpos(strtoupper($header['Chunk']), 'ANMF') !== false ) { $header['Animation'] = true; } else { $header['Animation'] = false; } if (strpos(strtoupper($header['Chunk']), 'ALPH') !== false) { $header['Alpha'] = true; } else { if (strpos(strtoupper($header['Vp']), 'VP8L') !== false) { // if it is VP8L, I assume that this image will be transparency // as described in https://developers.google.com/speed/webp/docs/riff_container#simple_file_format_lossless $header['Alpha'] = true; } else { $header['Alpha'] = false; } } unset($header['Chunk']); return $header;}// webpinfo?>Reference: https://stackoverflow.com/a/68491679/128761Usage:<?php$info = webpinfo('your-image.webp');if (isset($info['Animation']) && $info['Animation'] === true) { echo 'It is animated webp.';} if (isset($info['Alpha']) && $info['Alpha'] === true) { echo 'It is transparent webp.';} ?>