*/
$images = $this->find( '
]+[\s"\'])?src\s*=\s*[\'"]\s*?([^\'"]+(?:\?[^\'"]*)?)\s*?[\'"]([^>]+)?\/?>', $html );
if ( ! $images ) {
return $html;
}
$need_to_process = false;
foreach ( $images as $image ) {
$image_url = $image[2];
// we don't process external files or files that don't exist
if($this->is_external_file( $image_url )) {
continue;
}
$image_path = $this->get_file_path( $image[2] );
if( ! file_exists( $image_path ) ) {
continue;
}
$ext = pathinfo( $image_path, PATHINFO_EXTENSION );
$mime = mime_content_type( $image_path );
$ext_quoted = preg_quote( $ext, '/' );
$image_webp_url = preg_replace( '/^(.+\.)'.$ext_quoted.'(\?.+)?$/u', '$1' . substr( md5( $ext ), -6 ) . '.webp$2', $image_url );
$image_webp_path = preg_replace( '/^(.+\.)'.$ext_quoted.'$/u', '$1' . substr( md5( $ext ), -6 ) . '.webp', $image_path );
// and skip non-images or images already in webp format
if ( 'webp' == $ext || ! preg_match( '/image\/.+/i', $mime ) || preg_match( '/image\/(svg.*|ico|gif|webp)/i', $mime ) ) {
continue;
}
// check if the image has a webp version and if it has then just replace it in the html
$image = $this->wpdb->get_row(
$this->wpdb->prepare(
"SELECT * FROM `{$this->wpdb->prefix}ezcache_webp_images` WHERE `uid` = %s LIMIT 1",
[ sha1( $image_path ) ]
)
);
if ( $image && 'completed' == $image->status ) {
$html = preg_replace( '/\b' . preg_quote( $image_url, '/' ) . '\b/u', $image->webp_url, $html );
continue;
}
if ( $image && 'pending' == $image->status ) {
// image is being processed in background
continue;
}
if ( $image && 'failed' == $image->status ) {
// if the image has failed we need to requeue it
$this->wpdb->query(
$this->wpdb->prepare(
"DELETE FROM `{$this->wpdb->prefix}ezcache_webp_images` WHERE `id` = %d",
[ $image->id ]
)
);
}
// otherwise send the image to process
// this should parse the images and set a callback to update the cache file
$this->wpdb->query(
$this->wpdb->prepare(
"INSERT INTO `{$this->wpdb->prefix}ezcache_webp_images` (`uid`, `url`, `webp_url`, `path`, `webp_path`, `status`, `created_at`, `updated_at`) VALUES (%s, %s, %s, %s, %s, %s, %s, %s)",
[ sha1( $image_path ), $image_url, $image_webp_url, $image_path, $image_webp_path, 'pending', date( 'Y-m-d H:i:s' ), date( 'Y-m-d H:i:s' ) ]
)
);
if ( empty( $this->wpdb->last_error ) ) {
$need_to_process = true;
$this->webp_processor->push_to_queue( [
'row_id' => $this->wpdb->insert_id,
'image_url' => $image_url,
'image_path' => $image_path,
'image_webp_url' => $image_webp_url,
'image_webp_path' => $image_webp_path,
'cache_file' => $this->cache_file,
] );
} else {
error_log( 'ezCache WebP Converter Error: ' . $this->wpdb->last_error );
}
}
if ( $need_to_process ) {
add_filter( 'http_headers_useragent', function () {
return 'webp background processor';
}, 9999 );
$this->webp_processor->save();
}
return $html;
}
}
*