Custom Validation script

  • DavidArgos
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DavidArgos created the topic: Custom Validation script

Good afternoon,

I'm trying to integrate a php function to validate one of the fields in my form.

The name of the field is iban.
The function is called comprobar_iban and is as follows:

* Value to validate an IBAN bank account
function comprobar_iban($iban)
# we define an array of values with the value of each letter
$letras=array("A"=>10, "B"=>11, "C"=>12, "D"=>13, "E"=>14, "F"=>15, "G"=>16,"H"=>17, "I"=>18, "J"=>19, "K"=>20, "L"=>21, "M"=>22, "N"=>23, "O"=>24, "P"=>25, "Q"=>26, "R"=>27, "S"=>28, "T"=>29, "U"=>30, "V"=>31, "W"=>32, "X"=>33, "Y"=>34, "Z"=>35);

# We eliminate the possible spaces at the beginning and end

# We make capital letters

# we eliminate space and hyphens in the iban
$iban=str_replace(array(" ","-"),"",$iban);

# We get the codes of the two letters
$valorLetra1 = $letras[substr($iban, 0, 1)];
$valorLetra2 = $letras[substr($iban, 1, 1)];

# we get the following two values
$siguienteNumeros= substr($iban, 2, 2);

$valor = substr($iban, 4, strlen($iban)).$valorLetra1.$valorLetra2.$siguienteNumeros;

return true;
return false;
return false;

I have introduced the function in the scripts section and in the field validation dropdown, I choose my function but it doesn't work and it doesn't even send the form.

Can you help me?

Thank you
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mihaela replied the topic: Custom Validation script


To validate elements a JavaScript code should be put in the validation script. Since you are using a php script it can't work.

You can create a validation script by writing the code similar to this:
function ff_comprobar_iban(element, message)
    if (/* PUT CONDITION HERE */) return ''; 
    if (message=='') message = "Please enter "".\n";
    return message;
} // ff_comprobar_iban

In the If statement you should put the condition which has to be true in order for user to be able to submit the form.

Let me know whether this helped and whether you've managed to write the wanted script.


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