wp-includes/class-wp-http-encoding.php:149What encoding types to accept and their priority values.
$urlstring$argsarraystringOne hook fires while WP_Http_Encoding::accept_encoding() runs, in this order:
Filters the allowed encoding types.
public static function accept_encoding( $url, $args ) { $type = array(); $compression_enabled = self::is_available(); if ( ! $args['decompress'] ) { // Decompression specifically disabled. $compression_enabled = false; } elseif ( $args['stream'] ) { // Disable when streaming to file. $compression_enabled = false; } elseif ( isset( $args['limit_response_size'] ) ) { // If only partial content is being requested, we won't be able to decompress it. $compression_enabled = false; } if ( $compression_enabled ) { if ( function_exists( 'gzinflate' ) ) { $type[] = 'deflate;q=1.0'; } if ( function_exists( 'gzuncompress' ) ) { $type[] = 'compress;q=0.5'; } if ( function_exists( 'gzdecode' ) ) { $type[] = 'gzip;q=0.5'; } } /** * Filters the allowed encoding types. * * @since 3.6.0 * * @param string[] $type Array of what encoding types to accept and their priority values. * @param string $url URL of the HTTP request. * @param array $args HTTP request arguments. */ $type = apply_filters( 'wp_http_accept_encoding', $type, $url, $args ); return implode( ', ', $type ); }Introduced in 2.8.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-http-encoding.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.