<?php
function umlaute($str) {
  return str_replace(array(
      'Ä',
      'Ö',
      'Ü',
      'ä',
      'ö',
      'ü',
      'ß'
  ), array(
      '&Auml;',
      '&Ouml;',
      '&Uuml;',
      '&auml;',
      '&ouml;',
      '&uuml;',
      '&szlig;'
  ), $str);
}
function chk($str) {
  return str_replace("'", '"', $str);
}
function noScript($str) {
  return str_replace(array(
      '<',
      '>'
  ), array(
      '&lt;',
      '&gt;'
  ), $str);
}
function random($name_laenge) {
  $zeichen = "abcedfghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRTSUVWXYZ0123456789";
  $name_neu = "";

  @mt_srand((double)microtime() * 1000000);
  for($i = 0; $i < $name_laenge; $i++){
    $r = mt_rand(0, strlen($zeichen) - 1);
    $name_neu .= $zeichen{$r};
  }
  return $name_neu;
}
function startsWith($haystack, $needle) {
  $length = strlen($needle);
  return (substr($haystack, 0, $length) === $needle);
}
function endsWith($haystack, $needle) {
  $length = strlen($needle);

  return $length === 0 || (substr($haystack, -$length) === $needle);
}
function onlyAlpha($str) {
  return preg_replace("/[^a-zA-Z0-9 \-\_]+/", "", $str);
}
function shortener($str, $len = 50, $fill = '...') {
  if(strlen($str) > $len){
    $str = substr($str, 0, $len - strlen($fill)) . $fill;
  }
  return $str;
}
function isEmail($str) {
  $match = preg_match("/[a-zA-Z0-9\-\_\.]*\@[a-zA-Z0-9\-\_\.]*.[a-z]{2,10}/", $str);
  if($match){
    return $str;
  }
  return false;
}

?>