Learn how to a build a cloud-first strategyRegister Now

x
?
Solved

PHP Validate a string is a valid currency decimal

Posted on 2010-09-10
2
Medium Priority
?
669 Views
Last Modified: 2012-05-10
Hi,

Given some user input I want to validate a string is an integer and convert this to a (foat,decimal) number to 2 d.p.

Input examples

7 ==> 7.00
70 ==> 70.00
70.3 ==> 70.30
70.35 ==> 70.35
40.995 ==> 41.00
40.994 ==> 40.99
70.54p ==> not valid
$70.00 ==> Not valid ($)
70GBP ==> Not valid (GBP)

Many thanks,




0
Comment
Question by:bigMlittleC
2 Comments
 
LVL 6

Assisted Solution

by:Mike D
Mike D earned 800 total points
ID: 33644566
Hi bigMlittleC,

I realize you're asking for PHP but since I found this under JS and my code should work similar in PHP here it is (I did this for a german customer hence the ',' [comma] and you would have to include a rounding function for 3 digits behind the decimal point scenario):

if(tot_price.indexOf(".") != -1) {
      fancy_tot_price = tot_price.substring(0, tot_price.indexOf(".")) + "," + tot_price.substring(tot_price.indexOf(".")+1, tot_price.length) + '0'      
}
else
      fancy_tot_price = tot_price + ',00'


Hope this helps!

greets
JD
0
 
LVL 12

Accepted Solution

by:
Mohamed Abowarda earned 1200 total points
ID: 33644598
First, you have to use is_numeric function to insure that the input is a number, then you can use strpos function to check if the string contains dot "." so you can know if it's decimal or integer.

is_numeric:
http://php.net/manual/en/function.is-numeric.php

strrpos:
http://php.net/manual/en/function.strrpos.php
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article discusses how to create an extensible mechanism for linked drop downs.
This article discusses how to implement server side field validation and display customized error messages to the client.
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
The viewer will learn how to create a basic form using some HTML5 and PHP for later processing. Set up your basic HTML file. Open your form tag and set the method and action attributes.: (CODE) Set up your first few inputs one for the name and …
Suggested Courses
Course of the Month20 days, 21 hours left to enroll

810 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question