PHP Validate a string is a valid currency decimal

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,




bigMlittleCAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Mike DSolution ConsultantCommented:
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
Mohamed AbowardaSoftware EngineerCommented:
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

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
PHP

From novice to tech pro — start learning today.