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my question is about validation using php. i am validating a username which a user would enter and clicks on a image to find
if that username is available. example if a user enters abc#123 php file is reading this value as abc ONLY which i do not
want instead the php file should read as abc#123. follow is the sequence of pages. please advice the solution.
first page = register.php here a user enters a username and clicks on an image to find out if the username is available or
not. using a javascript function of onclick i am reading the value entered in the form in javascript as
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var useri = document.registrationform.username
var valueofuseri = document.registrationform.username.value
var recui = /^\s{1,}$/g;
if ((useri.value==null) || (useri.value=="") || (useri.length=="") || (useri.value.search(recui))> -1)
{
alert("Please Enter a User Name")
return false
}
window.open("checkusernamei.php?theusernameis="+va lueofuseri, "titleforavailabilityi", "width=680, height=275, status=1,
scrollbars=1, resizeable=yes");
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second page = checkusernamei.php = this file uses GET to read what was entered in the form.
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$username = $_GET["theusernameis"];
if( $username == "" || !preg_match("/^[a-z0-9]+(?:_[a-z0-9]+)?$/i", $username) )
{
echo "username is blank or has special characters";
}
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the # sign is being ignored only if the image is clicked in order to check the username, if the user enters abc#123 and
clicks the submit button without clicking on the checkuser image button then my php validation for username shows an error
message.
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if( $username == "" || !preg_match("/^[a-z0-9]+(?:_[a-z0-9]+)?$/i", $username) )
{ echo "display error message for username"; }
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now the problem is with clicking the image only and passing using GET method how can i fix this problem.
please advice.
thanks.
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