Tag Archives: php function

PHP function for pagination/paging

Found this function. Not tested yet but maybe useful in the future.

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<?php
// example variable
$sql_limit = (isset($_GET['limit'])) ? $_GET['limit'] : 0;
 
function navigation_links($curr_limit, $num_records, $limit_val, $limit_var = "limit", $next = "next >", $prev = "< prev", $seperator = "|") {
    // rebuild query string
    if (!empty($_SERVER['QUERY_STRING'])) {
        $parts = explode("&", $_SERVER['QUERY_STRING']);
        $newParts = array();
        foreach ($parts as $val) {
            if (stristr($val, $limit_var) == false) array_push($newParts, $val);
        }
        $qs = (count($newParts) > 0) ? "&".implode("&", $newParts) : "";
    } else {
        $qs = "";
    }
    $navi = "";
    if ($curr_limit > 0) {
        $navi .= "<a href="".$_SERVER['PHP_SELF']."?".$limit_var. "=".($curr_limit-$limit_val).$qs."">".$prev."</a>";
    }
    $navi .= " ".$seperator." ";
    if ($curr_limit < ($num_records-$limit_val)) {
        $navi .= "<a href="".$_SERVER['PHP_SELF']."?".$limit_var. "=".($curr_limit+$limit_val).$qs."">".$next."</a>";
    }
    return trim($navi, " | ");
}
 
// example placing links ($num_all is the value of all records in you result set)
echo navigation_links($sql_limit, $num_all, 10);
?>

source | more functions avail.

PHP code to check email validity

This PHP code can be used to check whether email is valid or not by ILoveJackDaniel. It is a bit lengthy compared to other script, but this one is more comprehensive.

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function check_email_address($email) {
  // First, we check that there's one @ symbol,
  // and that the lengths are right.
  if (!ereg("^[^@]{1,64}@[^@]{1,255}$", $email)) {
    // Email invalid because wrong number of characters
    // in one section or wrong number of @ symbols.
    return false;
  }
  // Split it into sections to make life easier
  $email_array = explode("@", $email);
  $local_array = explode(".", $email_array[0]);
  for ($i = 0; $i < sizeof($local_array); $i++) {
    if
(!ereg("^(([A-Za-z0-9!#$%&'*+/=?^_`{|}~-][A-Za-z0-9!#$%&
↪'*+/=?^_`{|}~\.-]{0,63})|(\"[^(\\|\")]{0,62}\"))$",
$local_array[$i])) {
      return false;
    }
  }
  // Check if domain is IP. If not,
  // it should be valid domain name
  if (!ereg("^\[?[0-9\.]+\]?$", $email_array[1])) {
    $domain_array = explode(".", $email_array[1]);
    if (sizeof($domain_array) < 2) {
        return false; // Not enough parts to domain
    }
    for ($i = 0; $i < sizeof($domain_array); $i++) {
      if
(!ereg("^(([A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])|
↪([A-Za-z0-9]+))$",
$domain_array[$i])) {
        return false;
      }
    }
  }
  return true;
}