PHP cheat sheet.

README.md

####PHP cheat sheet.

cheatSheet.php

<?
  //Strings
  $str = "This is a string \n";
  $str2 = 'This is another string.';
  print "<p>The string '$str' is ".strlen($str).
  " characters long.</p>";

  //Date
  print date('r').
  "<br>";
  $now_1 = getdate();
  $now_2 = localtime();
  print "{$now_1['hours']}:{$now_1['minutes']}:{$now_1['seconds']}\n";
  print "$now_2[2]:$now_2[1]:$now_2[0]";
  print "<br />";
  $a = getdate();
  printf('%s %d, %d', $a['month'], $a['mday'], $a['year']);
  print "<br /><br />";

  //Arrays 
  $cars = ['Ferrari', 'Maserati', 'Audi', 'BMW', 'Alfa Romeo'];
  print $cars[0];
  print "<ul>";
  foreach($cars as $car) {
    print "<li>$car</li>";
  }
  print "</ul>";

  //Numeric Example
  foreach([5, '5', '05', 12.3, '16.7', 'five', 0xDECAFBAD, '10e200'] as $maybeNumber) {
    $isItNumeric = is_numeric($maybeNumber);
    $actualType = gettype($maybeNumber);
    print "<br>Is the $actualType $maybeNumber numeric? ";
    if (is_numeric($maybeNumber)) {
      print "yes \r\n";
    } else {
      print "no";
    }
    print "\n";
  }

  //Functions

  function add($a, $b) {
    return $a + $b;
  }
  $total = add(2, 2);
  print "<br><br>Function 'add' = $total<br>";

  function wrap_in_html_tag($text, $tag = 'strong') {
    return "<$tag>$text</$tag>";
  }
  print wrap_in_html_tag("Apache HTML requests are slow and annoying!<br>");

  //Classes
  class Animal {
    public $name = "default";
    public $age = 0;
  }

  $animal = new animal;

  //Web stuff

  //Cookie
  setcookie('Car', 'BMW');
  if (isset($_COOKIE['Car'])) {
    print "<br>You drive a {$_COOKIE['Car']}.<br>";
  }

  //Query String
  $vars = array(
    'make' = > 'Ferrari',
    'model' = > '488 GTB',
    'year' = > '2016'
  );
  $query_string = http_build_query($vars);
  $url = '/muppet/select.php?'.$query_string;
  print $url;

?>