PHP - Moved: Validate Problems

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Hello   I have a PHP page that sends text entered by a user to our database which we use to display news. This system supports various languages but occasionally we get issues with odd characters being entered...     For example, the premade glyph for ellipsis which is normally represented by 3 .'s broke our system today   How can I check that each character is valid and within range?   These are our character ranges    ExtendedLatin_c_iLowerAlphaChar = 0x00C0; ExtendedLatin_c_iUpperAlphaChar = 0x01FF; Arabic_c_iLowerChar = 0x600; Arabic_c_iUpperChar = 0x6FF; Arabic_c_iLowerAlphaChar = 0x621; Arabic_c_iUpperAlphaChar = 0x64A; Arabic_c_iLowerNumericChar = 0x660; Arabic_c_iUpperNumericChar = 0x669;   So each character must fall within one of these ranges... but I have no idea how to get the hex value of a character in PHP   Thanks    

Hey everyone, im building my first newsletter sign up and wanted to add the validation of checking if the email is already in the database.

This is the top part of the code that works.
<?php

switch ($_REQUEST['action']) {

default:

foreach($_POST as $key=>$value){
$$key = $value;
}

if ($email == ''){
$error_msg = 'email required';
}

elseif (!eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $email)) { 
    $error_msg = 'Invalid email address'; 
}
echo "";


if ($error_msg == ''){

foreach($_POST as $key=>$value){
$$key = htmlentities(stripslashes($value));
}
 $Q = mysql_query("INSERT INTO newsletter (`email`) VALUES ('$email')");

But when i add my attempted validation it doesn't work.

$check = mysql_query("SELECT FROM newsletter WHERE email = '$email'") or die(mysql_error()); 
 $check2 = mysql_num_rows($check); 
 if ($check2 != 1) {
 
 $error_msg = 'email exists'; 

Could someone be so kind to add this code where it should go, iv tried everything.

This is probably a simple one, but I'm not experienced with arrays.

I have a form with looped dropdowns for items from a database. On submit it goes to a second page. Before I run any script I want to make sure the array created from the dropdowns contains anything greater than 0...

I thought this would do it:

if (isset($_POST['participantqty']) && ($_POST['participantqty']) > 0){
But it does nothing.

I also tried:
if (isset($_POST['participantqty[]']) && ($_POST['participantqty[]']) > 0){

I do not know whats going on.  I have tried two different methods of validating and email and it keeps saying invalid email
I have even tried to debug it by putting errors and nothing
i have tried
preg_match("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$^", $e)
and
fliter_var($e, FLITER_VALIDATE_EMAIL);

the email i am trying to debug is a valid one.  its one I use daily.  I have tried different emails and still no luck.... someone help me please!

How do I make email, name and phone required fields?

thanks in advance

<?php
$email = $_POST['email'];
$name = trim($_POST['name']);
$phone = trim($_POST['phone']);
$time = trim($_POST['time']);
$zipcode = trim($_POST['zipcode']);
$date = trim($_POST['date']);


$EmailTo = "myemail@somedomain.com";
$Subject = "form"; /// Add a subject

$Body = "";
$Body .= "Full name:\n$name\n\n";
$Body .= "Primary phone:\n$phone\n\n";
$Body .= "time:\n$time\n\n";
$Body .= "Zip code:\n$zipcode\n\n";
$Body .= "date:\n$date\n\n";

if($Subject == NULL) {$Subject = "From $EmailFrom";}
$success = mail($EmailTo, $Subject, $Body, "From: <$EmailFrom>");

if ($success){ header ('Location: confirm.html');}
else{  echo "Error! Your e-mail was not sent!";}
?>

Where should I validate the return value? In the function should I validate the value before returning it. Or once the value has been returned, should I check it? Is it really necessary to validate the return value? Thank you.    

Hi Everyone..   I am not sure if I should post this question here. I would like to fix this problem using PHP rather than HTML. I am new to PHP. This code is part of an old PHP gallery file. I am trying to validate my site but the site's links have some characters that makes the link throw errors in W3C Validator. So I tried to replace the characters with HTML characters for example ? are now replaced by &#63;   so my original link before using valid HTML characters looked like

www.awebsite.com/viewgallery.php?cname=Colorado-Fall&pcaption=Lost-In-The-art

And now it looks like this ...

www.awebsite.com/viewgallery.php?cname=Colorado-Fall&pcaption=Lost-In-The-art

But now W3C Validator shows an error like this Line 32, Column 240: an attribute value must be a literal unless it contains only name characters

…n class='next'><a href=viewgallery.php&#63;cname&#61;Colorado-Journeys&amp;pca…

✉ You have used a character that is not considered a "name character" in an attribute value. Which characters are considered "name characters" varies between the different document types, but a good rule of thumb is that unless the value contains only lower or upper case letters in the range a-z you must put quotation marks around the value. In fact, unless you have extreme file size requirements it is a very very good idea to always put quote marks around your attribute values. It is never wrong to do so, and very often it is absolutely necessary.

Hi,

I want to control a variable (decide whether to track click if coming from a specific site oppose to hitting the final site (destination) directly.
For example:

www.portal.com - this will be a management site that will redirect viewers to the the final destination based on variable info - for exmample $a=123 or $a= 567 - which would come in as www.portal.com?a=123 or www.portal.com?a=567

Note: 123 would redirect to www.abc.com?a=123 and/or 567 would redirect to www.xyz.com?a=567 with said variable(s).
------

My question is this: What is the best method to authenticate (both on) www.abc.com and/or www.xyz.com that the referred viewer came from www.portal.com?
I know about the super globals (HTTP_REFERER) but want to know if there are other (more) secure method to manage this interaction between external domains /websites?

Any insight on this appreciated - thanks!