Hello!
I need some help. I have no idea on PHP and I need to set up a custom validation rule. I have a field which name is IBAN. It is composed of 24 characters, de first 4 are PPXX (2 letters and 2 numbers) and the rest are numeric. I need a php function that checks that the structure is correct. I will implement it in RSForms. Can anyone help?
Cheers,
Dani
/[A-Z]{2}\d{2}[A-Z]{4}\d{10}/
You can use preg_match. Techically, the character combinations are limited. Not sure if you want to implement that.
Thanks pritaeas. Where do I place this code? Could you give me more info? As I said, I have no idea on PHP, so detailed help will be really useful.
We can be a little conservative by splitting them in sequences using substr PHP function.
## we need to set everything as string first
$str = 'ab5611571608318077634568';
## validate if the entire string is 24
if(strlen($string)== 24){
## get the first two
$first_two = substr($string, 0, 2); //returns ab
## validate here if first_two are letters only
## get the third and the fourth for your number validation
$numbers = substr($string, 2,2); //returns 56
## validate here if $numbers are anything between 0 - 9
## get 20 characters from the right returns 11571608318077634568
$twenty_numbers = (substr($string,-20));
## validate here if twenty_numbers are numeric 0-9
}
Use regex validation as suggested by Pritaeas.
Do note that there are more formats correct, than just 24 long:
http://en.wikipedia.org/wiki/International_Bank_Account_Number
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