hphp/test/zend/bad/ext-standard-array/usort_variation1.php

   1 <?php
   2 /* Prototype  : bool usort(array $array_arg, string $cmp_function)
   3  * Description: Sort an array by values using a user-defined comparison function
   4  * Source code: ext/standard/array.c
   5  */
   6
   7 /*
   8  * Pass different data types as $array_arg argument to usort() to test behaviour
   9  */
  10
  11 echo "*** Testing usort() : usage variations ***\n";
  12
  13 // Initialise function arguments not being substituted
  14 function cmp_function($value1, $value2)
  15 {
  16   if($value1 == $value2) {
  17     return 0;
  18   }
  19   else if($value1 > $value2) {
  20     return 1;
  21   }
  22   else {
  23     return -1;
  24   }
  25 }
  26
  27 //get an unset variable
  28 $unset_var = 10;
  29 unset ($unset_var);
  30
  31 // get a class
  32 class classA
  33 {
  34   public function __toString() {
  35     return "Class A object";
  36   }
  37 }
  38
  39 // heredoc string
  40 $heredoc = <<<EOT
  41 hello world
  42 EOT;
  43
  44 // get a resource variable
  45 $fp = fopen(__FILE__, "r");
  46
  47 // unexpected values to be passed to $array_arg argument
  48 $inputs = array(
  49
  50        // int data
  51 /*1*/  0,
  52        1,
  53        12345,
  54        -2345,
  55
  56        // float data
  57 /*5*/  10.5,
  58        -10.5,
  59        12.3456789000e10,
  60        12.3456789000E-10,
  61        .5,
  62
  63        // null data
  64 /*10*/ NULL,
  65        null,
  66
  67        // boolean data
  68 /*12*/ true,
  69        false,
  70        TRUE,
  71        FALSE,
  72
  73        // empty data
  74 /*16*/ "",
  75        '',
  76        array(),
  77
  78        // string data
  79 /*19*/ "string",
  80        'string',
  81        $heredoc,
  82
  83        // object data
  84 /*22*/ new classA(),
  85
  86        // undefined data
  87 /*23*/ @$undefined_var,
  88
  89        // unset data
  90 /*24*/ @$unset_var,
  91
  92        // resource variable
  93 /*25*/ $fp
  94 );
  95
  96 // loop through each element of $inputs to check the behavior of usort()
  97 $iterator = 1;
  98 foreach($inputs as $input) {
  99   echo "\n-- Iteration $iterator --\n";
 100   var_dump( usort($input, 'cmp_function') );
 101   $iterator++;
 102 };
 103
 104 //closing resource
 105 fclose($fp);
 106 ?>
 107 ===DONE===