Inserting multivalues from textbox into the MySQL Database using PHP

Question

I'm having a problem with my PHP and MySQL project . I wanted to insert multi collumn value into the database but the truth is, im already confused by the codes. it's like this if you would like to take a look:

    if(!empty($_POST['brando'])){
        $A="brand = '$brando'";}
        else{
        $A=" ";}    

    if(!empty($_POST['prnameo'])){
        $B="product_name = '$prnameo'";}
        else{
        $B=" ";}    

    if(!empty($_POST['prido'])){
        $C="product_id = '$prido'";}
        else{
        $C=" ";}    

    if(!empty($_POST['prcolo'])){
        $D="color = '$prcolo'";}    
        else{
        $D=" ";}    

    if(!empty($_POST['priceo'])){
        $E="price = '$priceo'";}
        else{
        $E=" ";}    



        $sqlq="UPDATE $tbl_name2 SET $A $B $C $D $E  where id='$id'";


        mysql_query($sqlq);

I noticed that querying multivalue command into a database requires comma such as:

mysql_query("UPDATE $tablename SET collumn1='value', collum2='value' where id='value'");

and now i cant put any comma or "," in any of those codes, making the PHP page unable to send other variable values into the server.

even if i change the coding to this:

$sqlq="UPDATE $tbl_name2 SET $A , $B , $C , $D , $E  where id='$id'";

it'll produce what else but damn errors.

so i would like to ask for help if you know what i'm talking about. i know, it sounds like i've been stressed out by the codings.

ooh, this code too, i forgot to put it for these.

    for ($help_given=1, $help_given++)
    {
    echo "Thanks";
    }

Answer 1

Try to implode() an array with "," ，like this:

<?php
if(!empty($_POST['brando'])){
    $value[] ="brand = '$brando'";
}

if(!empty($_POST['prnameo'])){
    $value[] ="product_name = '$prnameo'";
}

if(!empty($_POST['prido'])){
    $value[] ="product_id = '$prido'";
}

if(!empty($_POST['prcolo'])){
    $value[] ="color = '$prcolo'";
}

if(!empty($_POST['priceo'])){
    $value[] ="price = '$priceo'";
}

$sqlq="UPDATE $tbl_name2 SET " . implode(",",$value)."  where id='$id'";
mysql_query($sqlq);
?>

Then, you'd better to use "mysql_escape_string" or "PDO::prepare" method to prevent SQL injection.

Answer 2

    if(isset($_POST['brando']))
    {
        $brando=mysql_escape_string($_POST['brando']);
        $A="brand = ".$brando;
    }
    else
    {
        $A=" ";
    }


    if(isset($_POST['prnameo']))
    {
        $prnameo=mysql_escape_string($_POST['prnameo']);
        $B="product_name = ".$prnameo;
    }
    else
    {
        $B=" ";
    }

    if(isset($_POST['prido']))
    {
        $prido=mysql_escape_string($_POST['prido']);
        $C="product_id = ".$prido;
    }
    else
    {
        $C=" ";
    }

    if(isset($_POST['prcolo']))
    {
        $prcolo=mysql_escape_string($_POST['prcolo']);
        $D="color= ".$prcolo;
    }
    else
    {
        $D=" ";
    }

    if(isset($_POST['priceo']))
    {
        $priceo=mysql_escape_string($_POST['priceo']);
        $E="price = ".$brando;
    }
    else
    {
        $E=" ";
    }

    $tbl_name="mytable";//to set
    $id='primary_key';//to set

    $sqlq="UPDATE $tbl_name SET $A, $B, $C, $D, $E  where id='$id'";

    mysql_query($sqlq);

Just put values where I have commented as //to set...