Compilation failed: range out of order in character class at offset 12

Question

I have a very basic HTML form with text boxes defined as

<li id="li_1" >
<label class="description" for="element_1">O teu nome </label>
<span>
<input id="element_1_1" name= "element_1_1" class="element text" pattern="[a-z0-9. -]+" maxlength="255" size="8" value=""/>
<label>Primeiro</label>
</span>
<span>
<input id="element_1_2" name= "element_1_2" class="element text" pattern="[a-z0-9. -]+" maxlength="255" size="14" value=""/>
<label>Apelido</label>
</span> 

This input is validated in a php file called email_send_pt.php using

// validation expected data exists
if(!isset($_POST['element_1_1']) ||
!isset($_POST['element_1_2']) ||
!isset($_POST['element_2']) ||{
died('Lamentamos, mas constam erros no seu registo.'); 
}

$first_name = $_POST['element_1_1']; // required
$second_name = $_POST['element_1_2']; // required
$email = $_POST['element_2']; // required

$error_message = "";
$string_exp = "/^[A-Za-z .'-]+$/";
if(!preg_match($string_exp,$first_name) ||
!preg_match($string_exp,$second_name)) {
$error_message .= 'O nome que preencheu não parece ser válido.<br />';
}

I am getting a constant "Compilation failed: range out of order in character class at offset 12 in email_send_pt.php on line 45"

Line 45 is "if(!preg_match($string_exp,$first_name) ||" As input I used "teu" (without "") which should be accepted…

Any idea why this error message is appearing ? Thank you for your help.

Answer 1

You have to close brace here and remove the || operator.

Also it is die() and not died()

died('Lamentamos, mas constam erros no seu registo.'); 

Putting it all together

if(!isset($_POST['element_1_1']) ||
    !isset($_POST['element_1_2']) ||
    !isset($_POST['element_2'])){
    die('Lamentamos, mas constam erros no seu registo.');
}

Answer 2

The message means that there is an error at character 12 in your regex. Since that is the apostrophe (single quote), my guess is that you need to escape it.