WML, PHP & invalid string characters

[Anon]

I have some input boxes in my WML page.

They send data to another page, where it is used in PHP code.

My problem is, if you enter invalid characters like $, ?, & etc. it causes an error as soon as it is sent to the next page.

A method for fixing please! I do need to be able to input symbols in my page, but I can do without the above characters though.

I don't know what to do, I can't validate it before it leaves the page using PHP, the variables aren't available to PHP until they're posted to the next page.

Email [e-mail] or post here.

[stuartc1]

if you can use javascript on the page with the form this may solve the problem.

here is a bit that may work.

function ValidateField(field) {
var valid = "$?&"
var ok = "yes";
var temp;
for (var i=0; i<field.value.length; i++) {
temp = "" + field.value.substring(i, i+1);
if (valid.indexOf(temp) == "-1") ok = "no";
}
if (ok == "no") {
alert("Please do not enter special characters.");
field.focus();
field.select();
}
}

and call it using:
onBlur="return ValidateField(this);"
in the form fileds.

hope this helps.
SC

[Anon]

AFAIK I can't use Javascript, the only options available are PHP, WML and WMLScript.

Suppose I could use the Perl command, that'd do it, but don't know what I need for that - any ideas?