check if value exists

Posted on 16th Feb 2014 07:03 pm by admin

I have googled this for a while and I am getting lots of different results. Is there a standard method used for checking to see if a value exists in a database before inserting a value? I have a form, you type your name and push submit, it inserts the name into the database and then the name shows up in a list. Right now, it accepts the same values. I want to add a check to say

if name exists, do something

Your Answer:

Login to answer

Other forums

Shuffle between users ??
I have multiple $users in table. I need to send them $message.

I need to send the next messag

Creating Images from images in PHP
Okay well I am trying to make a 'dynamic' calender image with PHP.

I have images like this:

db entry based on primary key
My "topics" table contains 10 entires
*--------------*
topicid topic
------

$_FILES array
Ok,

I just started experimenting with PHP today. My goal right now is to have people be able

Php mysql - select?
Hi i have this code:
Code: $iteminfo = mysql_query("SELECT desc FROM wc_items WHERE itemid =

noob cURL help
I have a pretty basic form that I need to cURL post to a file in my includes folder (includes/login.

InternetOpenUrl() Invalid cert
Hi all,

Does anyone know how to prevent calls to InternetOpenUrl() from failing with erro

Is there a more efficient way to code this than what I have?
I have three associative arrays.

$combinedSettings
$userSettings
$defaultSettings

How to kill asynchronous postback / current postback?
Hi,here is my problem:I have a web site with many pages of which some may take time to process resul

Pro-rata Billing in Periodic Billing for Rental
Hi guys,

We have a situation, where a rental contract starts at the mid of the month say