There are several options for downloading PECL extensions, such as:
pecl install extname command downloads the
     extensions code automatically, so in this case there is no need
     for a separate download.
    
   pecl download extname
    
    
     PECL extensions that have releases listed on the PECL web site are
     available for download and installation using the » pecl command.
     Specific revisions may also be specified.