hphp/test/zend/good/ext-standard-array/array_walk_basic2.php

   1 <?php
   2 /* Prototype  : bool array_walk(array $input, string $funcname [, mixed $userdata])
   3  * Description: Apply a user function to every member of an array
   4  * Source code: ext/standard/array.c
   5 */
   6
   7 echo "*** Testing array_walk() : basic functionality ***\n";
   8
   9 // associative array
  10 $fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple");
  11
  12 // User defined callback functions
  13 /*  Prototype : test_alter(mixed $item, mixed $key, string $prefix)
  14  *  Parameters : item - value in key/value pair
  15  *               key - key in key/value pair
  16  *               prefix - string to be added
  17  *  Description : alters the array values by appending prefix string
  18  */
  19 function test_alter(&$item, $key, $prefix)
  20 {
  21   // dump the arguments to check that they are passed
  22   // with proper type
  23   var_dump($item); // value
  24   var_dump($key);  // key
  25   var_dump($prefix); // additional agument passed to callback function
  26   echo "\n"; // new line to separate the output between each element
  27 }
  28
  29 /*  Prototype : test_print(mixed $item, mixed $key)
  30  *  Parameters : item - value in key/value pair
  31  *               key - key in key/value pair
  32  *  Description : prints the array values with keys
  33  */
  34 function test_print($item, $key)
  35 {
  36   // dump the arguments to check that they are passed
  37   // with proper type
  38   var_dump($item); // value
  39   var_dump($key);  // key
  40   echo "\n"; // new line to separate the output between each element
  41 }
  42
  43 echo "-- Using array_walk with default parameters to show array contents --\n";
  44 var_dump(array_walk($fruits, 'test_print'));
  45
  46 echo "-- Using array_walk with one optional parameter to modify contents --\n";
  47 var_dump (array_walk($fruits, 'test_alter', 'fruit'));
  48
  49 echo "-- Using array_walk with default parameters to show modified array contents --\n";
  50 var_dump (array_walk($fruits, 'test_print'));
  51
  52 echo "Done";
  53 ?>