(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
ftp_set_option — Set miscellaneous runtime FTP options
This function controls various runtime options for the specified FTP connection.
ftpAn FTP\Connection instance.
optionCurrently, the following options are supported:
| FTP_TIMEOUT_SEC | Changes the timeout in seconds used for all network related 
            functions. valuemust be an integer that
            is greater than 0. The default timeout is 90 seconds. | 
| FTP_AUTOSEEK | When enabled, GET or PUT requests with a resumeposorstartposparameter will first seek to the requested position within the file.
            This is enabled by default. | 
| FTP_USEPASVADDRESS | When disabled, PHP will ignore the IP address returned by the FTP server in response to the PASV command and instead use the IP address that was supplied in the ftp_connect(). valuemust be a boolean. | 
value
       This parameter depends on which option is chosen
       to be altered.
      
   Returns true if the option could be set; false if not. A warning
   message will be thrown if the option is not
   supported or the passed value doesn't match the
   expected value for the given option.
  
| Version | Description | 
|---|---|
| 8.1.0 | The ftpparameter expects an FTP\Connection
  instance now; previously, a resource was expected. | 
Example #1 ftp_set_option() example
<?php
// Set the network timeout to 10 seconds
ftp_set_option($ftp, FTP_TIMEOUT_SEC, 10);
?>