Question

Scenario:

I have got a client, php script and a MySQL database. I am sending information from the client to the database which the values include the name and favorite color. I have got 2 rows in MySQL database.

Name | Favorite Color

Johnny | Green

Where Name is a primary key.

Every time, the client would be sending both his name and favorite color. So if name (primary key) exist, it shows error. How should I set my php script to react if the client wants to update his favorite color? In other words, keep primary key but update favorite color.

script.php

<?php
mysql_connect("localhost","root","")
mysql_select_db("Information");

$name = mysql_real_escape_string($_POST["name"]);
$color = mysql_real_escape_string($_POST["color"]); 

$sql=mysql_query("insert into Male (name, color) VALUES ('$name','$color')"); 

mysql_close();

Answer 1

$sql=mysql_query("INSERT INTO Male (name, color) VALUES ('".$name."', '".$color."')
ON DUPLICATE KEY UPDATE color='".$color."'");

http://dev.mysql.com/doc/refman/5.1/en/insert-on-duplicate.html