WP_Http::chunkTransferDecode( string $body ): string

Source

public static function chunkTransferDecode( $body ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.MethodNameInvalid
	// The body is not chunked encoded or is malformed.
	if ( ! preg_match( '/^([0-9a-f]+)[^\r\n]*\r\n/i', trim( $body ) ) ) {
		return $body;
	}

	$parsed_body = '';

	// We'll be altering $body, so need a backup in case of error.
	$body_original = $body;

	while ( true ) {
		$has_chunk = (bool) preg_match( '/^([0-9a-f]+)[^\r\n]*\r\n/i', $body, $match );
		if ( ! $has_chunk || empty( $match[1] ) ) {
			return $body_original;
		}

		$length       = hexdec( $match[1] );
		$chunk_length = strlen( $match[0] );

		// Parse out the chunk of data.
		$parsed_body .= substr( $body, $chunk_length, $length );

		// Remove the chunk from the raw data.
		$body = substr( $body, $length + $chunk_length );

		// End of the document.
		if ( '0' === trim( $body ) ) {
			return $parsed_body;
		}
	}
}

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