hphp/test/quick/weird-isset-empty.php

   1 <?hh
   2
   3 $x = array("a","b","c");
   4 $y = 0;
   5 var_dump(isset($x[$y]));
   6 var_dump(empty($x[$y]));
   7 var_dump(isset($x->$y));
   8 var_dump(empty($x->$y));
   9 var_dump($x);
  10
  11 $x = array("a","b","c");
  12 $y = "0";
  13 var_dump(isset($x[$y]));
  14 var_dump(empty($x[$y]));
  15 var_dump(isset($x->$y));
  16 var_dump(empty($x->$y));
  17 var_dump($x);
  18
  19 echo "**************************\n";
  20
  21 $x = array(null);
  22 $y = 0;
  23 var_dump(isset($x[$y]));
  24 var_dump(empty($x[$y]));
  25 var_dump(isset($x->$y));
  26 var_dump(empty($x->$y));
  27 var_dump($x);
  28
  29 $x = array(null);
  30 $y = "0";
  31 var_dump(isset($x[$y]));
  32 var_dump(empty($x[$y]));
  33 var_dump(isset($x->$y));
  34 var_dump(empty($x->$y));
  35 var_dump($x);
  36
  37 echo "**************************\n";
  38
  39 $x = "abc";
  40 $y = 0;
  41 var_dump(isset($x[$y]));
  42 var_dump(empty($x[$y]));
  43 var_dump(isset($x->$y));
  44 var_dump(empty($x->$y));
  45 var_dump($x);
  46
  47 $x = "abc";
  48 $y = "0";
  49 var_dump(isset($x[$y]));
  50 var_dump(empty($x[$y]));
  51 var_dump(isset($x->$y));
  52 var_dump(empty($x->$y));
  53 var_dump($x);
  54
  55 echo "**************************\n";
  56
  57 $abc = array('foo' => array('bar' => 'baz'));
  58 $abc2 =& $abc;
  59 var_dump(isset($abc['foo']));
  60 var_dump(empty($abc['foo']));
  61 var_dump(isset($abc->foo));
  62 var_dump(empty($abc->foo));
  63 var_dump(isset($abc['foo']['bar']));
  64 var_dump(empty($abc['foo']['bar']));
  65 var_dump(isset($abc['foo']->bar));
  66 var_dump(empty($abc['foo']->bar));
  67 var_dump(isset($abc->foo['bar']));
  68 var_dump(empty($abc->foo['bar']));
  69 var_dump(isset($abc->foo->bar));
  70 var_dump(empty($abc->foo->bar));
  71
  72 echo "**************************\n";
  73
  74 $abc = new stdclass;
  75 $abc->foo = array('bar' => 'baz');
  76 var_dump(isset($abc->foo));
  77 var_dump(empty($abc->foo));
  78 var_dump(isset($abc->foo['bar']));
  79 var_dump(empty($abc->foo['bar']));
  80 var_dump(isset($abc->foo->bar));
  81 var_dump(empty($abc->foo->bar));
  82 unset($abc);
  83
  84 echo "**************************\n";
  85
  86 $abc = new stdclass;
  87 $abc2 =& $abc; // make $abc a Var
  88 $abc->foo = array('bar' => 'baz');
  89 var_dump(isset($abc->foo));
  90 var_dump(empty($abc->foo));
  91 var_dump(isset($abc->foo['bar']));
  92 var_dump(empty($abc->foo['bar']));
  93 var_dump(isset($abc->foo->bar));
  94 var_dump(empty($abc->foo->bar));
  95 unset($abc);
  96 unset($abc2);
  97
  98 echo "**************************\n";
  99
 100 $abc = array('foo' => new stdclass);
 101 $abc['foo']->bar = 'baz';
 102 var_dump(isset($abc['foo']));
 103 var_dump(empty($abc['foo']));
 104 var_dump(isset($abc->foo));
 105 var_dump(empty($abc->foo));
 106 var_dump(isset($abc['foo']->bar));
 107 var_dump(empty($abc['foo']->bar));
 108 var_dump(isset($abc->foo['bar']));
 109 var_dump(empty($abc->foo['bar']));
 110 var_dump(isset($abc->foo->bar));
 111 var_dump(empty($abc->foo->bar));
 112 unset($abc);
 113
 114 echo "**************************\n";
 115
 116 $abc = array('foo' => new stdclass);
 117 $abc2 =& $abc; // make $abc a Var
 118 $abc['foo']->bar = 'baz';
 119 var_dump(isset($abc['foo']));
 120 var_dump(empty($abc['foo']));
 121 var_dump(isset($abc->foo));
 122 var_dump(empty($abc->foo));
 123 var_dump(isset($abc['foo']->bar));
 124 var_dump(empty($abc['foo']->bar));
 125 var_dump(isset($abc->foo['bar']));
 126 var_dump(empty($abc->foo['bar']));
 127 var_dump(isset($abc->foo->bar));
 128 var_dump(empty($abc->foo->bar));
 129 unset($abc);
 130 unset($abc2);
 131
 132 echo "**************************\n";
 133