email form

i designed a form with a php send via email. what i cant figure out is how to collect the info from the checkboxes and put in the php
 
this is the check box:
 
<td id="td_element_field_0" style=""><div style="width:100%;padding-bottom:5px;"><input id="element_0_0" name="element_0[]" value="Health"
class="validate[required]"  type="checkbox" /><font face="Verdana" size="2" color="#000000"> Health </font></div><div style="width:100%;padding-bottom:5px;"><input id="element_0_1" name="element_0[]" value="Finances"
class="validate[required]"  type="checkbox" /><font face="Verdana" size="2" color="#000000"> Finances </font></div><div style="width:100%;padding-bottom:5px;"><input id="element_0_2" name="element_0[]" value="Family"
class="validate[required]"  type="checkbox" /><font face="Verdana" size="2" color="#000000"> Family </font></div><div style="width:100%;padding-bottom:5px;"><input id="element_0_3" name="element_0[]" value="Personal Dreams, Goals & Visions"
class="validate[required]"  type="checkbox" /><font face="Verdana" size="2" color="#000000"> Personal Dreams,Goals & Visions </font></div><div style="width:100%;padding-bottom:5px;"><input id="element_0_4" name="element_0[]" value="Restoration"
class="validate[required]"  type="checkbox" /><font face="Verdana" size="2" color="#000000"> Restoration </font></div><div style="width:100%;padding-bottom:5px;"><input id="element_0_5" name="element_0[]" value="Special Unspoken Request"
class="validate[required]"  type="checkbox" /><font face="Verdana" size="2" color="#000000"> Special Unspoken Request </font></div><div style="clear:both;"></div><div style="padding-bottom:8px;color:#000000;"><small><font face="Verdana"></font></small></div>
 
this is the php

<?php
if(isset($_POST['email'])) {
     
    // EDIT THE 2 LINES BELOW AS REQUIRED
    $email_to = "support@higherpowercomputers.com";
    $email_subject = "Prayer Request or Praise Report";
     
     
    function died($error) {
        // your error code can go here
        echo "We are very sorry, but there were error(s) found with the form you submitted. ";
        echo "These errors appear below.<br /><br />";
        echo $error."<br /><br />";
        echo "Please go back and fix these errors.<br /><br />";
        die();
    }
     
    // validation expected data exists
    if(!isset($_POST['first_name']) ||
        !isset($_POST['prayer_praise'])) {
        died('We are sorry, but there appears to be a problem with the form you submitted.');       
    }
     
    $first_name = $_POST['first_name']; // required
   	$prayer_praise = $_POST['prayer_praise']; // required
     
    $error_message = "";
    $email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/';
  if(!preg_match($email_exp,$email)) {
    $error_message .= 'The Email Address you entered does not appear to be valid.<br />';
  }
    $string_exp = "/^[A-Za-z .'-]+$/";
  if(!preg_match($string_exp,$first_name)) {
    $error_message .= 'The First Name you entered does not appear to be valid.<br />';
  }
  if(!preg_match($string_exp,$last_name)) {
    $error_message .= 'The Last Name you entered does not appear to be valid.<br />';
  }
  if(strlen($prayer_praise) < 2) {
    $error_message .= 'The Comments you entered do not appear to be valid.<br />';
  }
  if(strlen($error_message) > 0) {
    died($error_message);
  }
    $email_message = "Form details below.\n\n";
     
    function clean_string($string) {
      $bad = array("content-type","bcc:","to:","cc:","href");
      return str_replace($bad,"",$string);
    }
     
    $email_message .= "First Name: ".clean_string($first_name)."\n";
    $email_message .= "Last Name: ".clean_string($last_name)."\n";
	 $email_message .= "Phone Number: ".clean_string($phone_number)."\n";
    $email_message .= "Email: ".clean_string($email)."\n";
    $email_message .= "Subject: ".clean_string($subject)."\n";
    $email_message .= "Prayer and or Praise Report: ".clean_string($prayer_praise)."\n";
     
     
// create email headers
$headers = 'From: '.$email."\r\n".
'Reply-To: '.$email."\r\n" .
'X-Mailer: PHP/' . phpversion();
@mail($email_to, $email_subject, $email_message, $headers);  
?>
 
<!-- include your own success html here -->

 echo "<script>window.location = 'http://www.higherpowercomputers.com/faith//thank_you.html'</script>";

<?php
}
?>