This example illustrates how to read a file. Txt, and insert a record into a database MSSQLSERVER.
mysql would be the same, by simply varying the user to access the database:
 

    <?php    
    //--------------------------- Read data from file  ----------------------------    
    //read from file    
    $myFile = "meteoclimatic.htm";    
    $fh = fopen($myFile, 'r');    
    $tamany=filesize($myFile);    
    $theData = fread($fh,$tamany);    
    fclose($fh);    
    //llenO las variables    
    $hora=substr( $theData ,strrpos($theData, "*UPD=") + 16, 5);    
    $any=substr( $theData ,strrpos($theData, "*UPD=") + 11, 4);    
    $mes=substr( $theData ,strrpos($theData, "*UPD=") + 8, 2);    
    $dia=substr( $theData ,strrpos($theData,  "*UPD=") + 5 ,2 );    
    $temperatura=substr( $theData ,strrpos($theData, "*TMP=") + 5, strrpos($theData, "*WND=")-(strrpos($theData, "*TMP=") + 7));    
    $pluja=substr( $theData ,strrpos($theData, "*DPCP=") + 6, strrpos($theData, "*WRUN=")-(strrpos($theData, "*DPCP=") + 8));    
    if (trim($pluja)=="") $pluja="0";    
    $humitat=substr( $theData ,strrpos($theData, "*HUM=") + 5, strrpos($theData, "*SUN=")-(strrpos($theData, "*HUM=") + 7));    
    $viento=substr( $theData ,strrpos($theData, "*WND=") + 5, strrpos($theData, "*AZI=")-(strrpos($theData, "*WND=") + 7));    
    $racha=substr( $theData ,strrpos($theData, "*WRUN=") + 6, strrpos($theData, "*MHTM=")-(strrpos($theData, "*WRUN=") + 8));    
    $maxracha=substr( $theData ,strrpos($theData, "*DGST=") + 6, strrpos($theData, "*DSUN=")-(strrpos($theData, "*DGST=") + 8));    
    $direc=substr( $theData ,strrpos($theData, "*AZI=") + 5, strrpos($theData, "*BAR=")-(strrpos($theData, "*AZI=") + 7));    
    $pressio=substr( $theData ,strrpos($theData, "*BAR=") + 5, strrpos($theData, "*HUM=")-(strrpos($theData, "*BAR=") + 7));    
    $AMDHM=$any . $mes . $dia . $hora ;    
    //--------------------- save to  slq server  ----------------------------    
    $servidor="VISTA32";    
    $usuari="sa";    
    $password="";    
    $BBDD="RegistrosEstacion";    
    $link= mssql_connect($servidor,$usuari,$password);    
    if(!$link || !mssql_select_db($BBDD, $link))    
    {    
		mssql_close($link);    
		die('Impossible abrir Base de dades!');    
    }    
    $counter=0;    
    $result=mssql_query("select * from Registros where AMDHM='" . $AMDHM . "'",$link);    
    if ($row=mssql_fetch_array($result)) {    
		mssql_close($link);    
		die('Registro ya existente !!!!');    
    }    
    $result=mssql_query("select TOP 1 PCP from Registros  where DIA='" . $dia . "' AND MES='" . $mes . "' AND ANO='" . $any ."' ORDER BY AMDHM DESC",$link);    
    if ($row=mssql_fetch_array($result)) {    
		mssql_close($link);    
		die('Registro ja existente !!!!');    
	}    
    // FI PENDENT DE FER    
    // no existe por lo tanto lo inserto !!    
    $result=mssql_query("insert into Registros (AMDHM,DIA,MES,ANO,HORA,TMP,HUM,WND,GUST,AZI,BAR,PCP) values ('" . $AMDHM . "','" . $dia . "','" . $mes . "','" . $any .  "','" . $hora . "'," . $temperatura . "," . $humitat . "," . $viento . "," . $racha . ",'" . $direc . "'," . $pressio . "," . $pluja . ")");    
    echo("insert into Registros (AMDHM,DIA,MES,ANO,HORA,TMP,HUM,WND,GUST,AZI,BAR,PCP) values ('" . $AMDHM . "','" . $dia . "','" . $mes . "','" . $any .  "','" . $hora . "'," . $temperatura . "," . $humitat . "," . $viento . "," . $racha . ",'" . $direc . "'," . $pressio . "," . $pluja . ")");    
    mssql_close($link);    
	?>