HendrikEduard

function getDistanceFromLatLonInKm(lat1,lon1,lat2,lon2) {
  var R = 6371; // Radius of the earth in km
  var dLat = deg2rad(lat2-lat1);  // deg2rad below
  var dLon = deg2rad(lon2-lon1); 
  var a = 
    Math.sin(dLat/2) * Math.sin(dLat/2) +
    Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) * 
    Math.sin(dLon/2) * Math.sin(dLon/2)
    ; 
  var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 

HendrikEduard

<?php
  // Disclaimer: This is not the most modern method of doing this.
  function ordinal($num) {
    $test = abs($num) % 10;
    $suffix = ((abs($num) %100 < 21 && abs($num) %100 > 4) ? 'th'
            : (($test < 4) ? ($test < 3) ? ($test < 2) ? ($test < 1)
            ? 'th' : 'st' : 'nd' : 'rd' : 'th'));
    return $num.$suffix;
}

HendrikEduard

<?php
ini_set('log_errors', TRUE); // Error logging
ini_set('error_log', 'your/path/to/errors.log'); // Logging file
ini_set('log_errors_max_len', 1024); // Logging file size

HendrikEduard

<?php

  class Database extends PDO {
    // These variable should be in a separate file outside of your root directory
    private $host = '127.0.0.1';
    private $db   = 'database_name';
    private $user = 'anything_but_root';
    private $pass = 'anything_but_password';
    private $charset = 'utf8mb4';

HendrikEduard

function in($data) {
  $data = strip_tags($data);
  $data = stripslashes($data);
  return trim($data);
}

function out($data) {
  return htmlentities($data, ENT_QUOTES, 'UTF-8');
}

HendrikEduard

// var_Dump and Die
function dnd($data) {
  echo '<pre>';
  var_dump($data);
  echo '</pre>';
  die();
}

HendrikEduard

<?php
date_default_timezone_set ('Europe/Amsterdam');	 
  
  function greeting() {
	$day = date("l");
	$hour = date("H");

	if($hour < "12") {
	    $time = " morning ";  
	  } elseif ($hour >= "12" && $hour < "18") {

HendrikEduard

<?php

function form_token() {
  $token = bin2hex(random_bytes(33));
  return $token;
} // Usage
// $form_token = form_token();
// echo "$form_token";

HendrikEduard

<?php

function check_for_non_alpha_numeric($str) {
	
  $reg = '/[^[:alnum:]$]/';
  preg_match_all($reg, $str, $matches, PREG_SET_ORDER, 0);
  if($matches) {
	  print "<hr>oops, try again.<pre>";
      var_dump($matches);
  } else {

HendrikEduard

<?php
 function fibonacci($n) {
    $current = 1;
    $previous = 0;
    for ($i = 0; $i < $n; $i++) {
        yield $current;

        $temporary = $current;
        $current = $previous + $current;
        $previous = $temporary;