public function readPort($count = 0)
    {
        if ($this->_dState !== SERIAL_DEVICE_OPENED) {
            trigger_error("Device must be opened to read it", E_USER_WARNING);

            return false;
        }

        if ($this->_os === "linux" || $this->_os === "osx") {
            // Behavior in OSX isn't to wait for new data to recover, but just
            // grabs what's there!
            // Doesn't always work perfectly for me in OSX
            $content = ""; $i = 0;

            if ($count !== 0) {
                do {
                    if ($i > $count) {
                        $content .= fread($this->_dHandle, ($count - $i));
                    } else {
                        $content .= fread($this->_dHandle, 128);
                    }
                } while (($i += 128) === strlen($content));
            } else {
                do {
                    $content .= fread($this->_dHandle, 128);
                } while (($i += 128) === strlen($content));
            }

            return $content;
        } elseif ($this->_os === "windows") {
            // Windows port reading procedures still buggy
            $content = ""; $i = 0;

            if ($count !== 0) {
                do {
                    if ($i > $count) {
                        $content .= fread($this->_dHandle, ($count - $i));
                    } else {
                        $content .= fread($this->_dHandle, 128);
                    }
                } while (($i += 128) === strlen($content));
            } else {
                do {
                    $content .= fread($this->_dHandle, 128);
                } while (($i += 128) === strlen($content));
            }

            return $content;
        }

        return false;
    }
public function readPort($count = 0)
    {
        if ($this->_dState !== SERIAL_DEVICE_OPENED) {
            trigger_error("Device must be opened to read it", E_USER_WARNING);

            return false;
        }

        if ($this->_os === "linux" || $this->_os === "osx") {
            
            
            
            $content = ""; $i = 0;

            if ($count !== 0) {
                do {
                    if ($i > $count) {
                        $content .= fread($this->_dHandle, ($count - $i));
                    } else {
                        $content .= fread($this->_dHandle, 128);
                    }
                } while (($i += 128) === strlen($content));
            } else {
                do {
                    $content .= fread($this->_dHandle, 128);
                } while (($i += 128) === strlen($content));
            }

            return $content;
        } elseif ($this->_os === "windows") {
            
            $content = ""; $i = 0;

            if ($count !== 0) {
                do {
                    if ($i > $count) {
                        $content .= fread($this->_dHandle, ($count - $i));
                    } else {
                        $content .= fread($this->_dHandle, 128);
                    }
                } while (($i += 128) === strlen($content));
            } else {
                do {
                    $content .= fread($this->_dHandle, 128);
                } while (($i += 128) === strlen($content));
            }

            return $content;
        }

        return false;
    }
public function readPort ( $ count = 0 ) { if ( $ this -> _dState !== SERIAL_DEVICE_OPENED ) { trigger_error ( "Device must be opened to read it" , E_USER_WARNING ) ; return false ; } if ( $ this -> _os === "linux" || $ this -> _os === "osx" ) { // Behavior in OSX isn't to wait for new data to recover, but just // grabs what's there! // Doesn't always work perfectly for me in OSX $ content = "" ; $ i = 0 ; if ( $ count !== 0 ) { do { if ( $ i > $ count ) { $ content .= fread ( $ this -> _dHandle , ( $ count - $ i ) ) ; } else { $ content .= fread ( $ this -> _dHandle , 128 ) ; } } while ( ( $ i += 128 ) === strlen ( $ content ) ) ; } else { do { $ content .= fread ( $ this -> _dHandle , 128 ) ; } while ( ( $ i += 128 ) === strlen ( $ content ) ) ; } return $ content ; } elseif ( $ this -> _os === "windows" ) { // Windows port reading procedures still buggy $ content = "" ; $ i = 0 ; if ( $ count !== 0 ) { do { if ( $ i > $ count ) { $ content .= fread ( $ this -> _dHandle , ( $ count - $ i ) ) ; } else { $ content .= fread ( $ this -> _dHandle , 128 ) ; } } while ( ( $ i += 128 ) === strlen ( $ content ) ) ; } else { do { $ content .= fread ( $ this -> _dHandle , 128 ) ; } while ( ( $ i += 128 ) === strlen ( $ content ) ) ; } return $ content ; } return false ; }
Reads the port until no new datas are availible, then return the content.

@param int $count Number of characters to be read (will stop before
if less characters are in the buffer)
@return string
Reads the port until no new datas are availible then return the content .