hphp/test/zend/good/ext/standard/tests/array/uasort_variation7.php

   1 <?hh
   2 /* Prototype  : bool uasort(array $array_arg, string $cmp_function)
   3  * Description: Sort an array with a user-defined comparison function and maintain index association
   4  * Source code: ext/standard/array.c
   5 */
   6
   7 /*
   8 * Passing different anonymous functions as 'cmp_function'
   9 *   arguments passed by value
  10 *   arguments passed by reference
  11 */
  12 <<__EntryPoint>> function main(): void {
  13 echo "*** Testing uasort() : anonymous function as 'cmp_function' ***\n";
  14
  15 $cmp_function = ($value1, $value2) ==> { if($value1 == $value2) {return 0;} else if($value1 > $value2) {return 1;} else{return -1;} };
  16 $cmp_function_ref = (&$value1, &$value2) ==> { if($value1 == $value2) {return 0;} else if($value1 > $value2) {return 1;} else{return -1;} };
  17
  18 $array_arg = array(0 => 100, 1 => 3, 2 => -70, 3 => 24, 4 => 90);
  19 echo "-- Anonymous 'cmp_function' with parameters passed by value --\n";
  20 var_dump( uasort(inout $array_arg, $cmp_function ) );
  21 var_dump($array_arg);
  22
  23 $array_arg = array("b" => "Banana", "m" => "Mango", "a" => "Apple", "p" => "Pineapple");
  24 echo "-- Anonymous 'cmp_function' with parameters passed by reference --\n";
  25 var_dump( uasort(inout $array_arg, $cmp_function_ref) );
  26 var_dump($array_arg);
  27
  28 echo "Done";
  29 }