wp-admin/includes/class-ftp-sockets.php:28Socket Based FTP implementation
class ftp_sockets extends ftp_base { function __construct($verb=FALSE, $le=FALSE) { parent::__construct(true, $verb, $le); } // <!-- --------------------------------------------------------------------------------------- -->// <!-- Private functions -->// <!-- --------------------------------------------------------------------------------------- --> function _settimeout($sock) { if(!@socket_set_option($sock, SOL_SOCKET, SO_RCVTIMEO, array("sec"=>$this->_timeout, "usec"=>0))) { $this->PushError('_connect','socket set receive timeout',socket_strerror(socket_last_error($sock))); @socket_close($sock); return FALSE; } if(!@socket_set_option($sock, SOL_SOCKET , SO_SNDTIMEO, array("sec"=>$this->_timeout, "usec"=>0))) { $this->PushError('_connect','socket set send timeout',socket_strerror(socket_last_error($sock))); @socket_close($sock); return FALSE; } return true; } function _connect($host, $port) { $this->SendMSG("Creating socket"); if(!($sock = @socket_create(AF_INET, SOCK_STREAM, SOL_TCP))) { $this->PushError('_connect','socket create failed',socket_strerror(socket_last_error($sock))); return FALSE; } if(!$this->_settimeout($sock)) return FALSE; $this->SendMSG("Connecting to \"".$host.":".$port."\""); if (!($res = @socket_connect($sock, $host, $port))) { $this->PushError('_connect','socket connect failed',socket_strerror(socket_last_error($sock))); @socket_close($sock); return FALSE; } $this->_connected=true; return $sock; } function _readmsg($fnction="_readmsg"){ if(!$this->_connected) { $this->PushError($fnction,'Connect first'); return FALSE; } $result=true; $this->_message=""; $this->_code=0; $go=true; do { $tmp=@socket_read($this->_ftp_control_sock, 4096, PHP_BINARY_READ); if($tmp===false) { $go=$result=false; $this->PushError($fnction,'Read failed', socket_strerror(socket_last_error($this->_ftp_control_sock))); } else { $this->_message.=$tmp; $go = !preg_match("/^([0-9]{3})(-.+\\1)? [^".CRLF."]+".CRLF."$/Us", $this->_message, $regs); } } while($go); if($this->LocalEcho) echo "GET < ".rtrim($this->_message, CRLF).CRLF; $this->_code=(int)$regs[1]; return $result; } function _exec($cmd, $fnction="_exec") { if(!$this->_ready) { $this->PushError($fnction,'Connect first'); return FALSE; } if($this->LocalEcho) echo "PUT > ",$cmd,CRLF; $status=@socket_write($this->_ftp_control_sock, $cmd.CRLF); if($status===false) { $this->PushError($fnction,'socket write failed', socket_strerror(socket_last_error($this->stream))); return FALSE; } $this->_lastaction=time(); if(!$this->_readmsg($fnction)) return FALSE; return TRUE; }Introduced in 2.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/class-ftp-sockets.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.