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--TEST--
Test array_walk() function : basic functionality - associative array
--FILE--
<?php
/* Prototype : bool array_walk(array $input, string $funcname [, mixed $userdata])
* Description: Apply a user function to every member of an array
* Source code: ext/standard/array.c
*/
echo "*** Testing array_walk() : basic functionality ***\n";
// associative array
$fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple");
// User defined callback functions
/* Prototype : test_alter(mixed $item, mixed $key, string $prefix)
* Parameters : item - value in key/value pair
* key - key in key/value pair
* prefix - string to be added
* Description : alters the array values by appending prefix string
*/
function test_alter(&$item, $key, $prefix)
{
// dump the arguments to check that they are passed
// with proper type
var_dump($item); // value
var_dump($key); // key
var_dump($prefix); // additional argument passed to callback function
echo "\n"; // new line to separate the output between each element
}
/* Prototype : test_print(mixed $item, mixed $key)
* Parameters : item - value in key/value pair
* key - key in key/value pair
* Description : prints the array values with keys
*/
function test_print($item, $key)
{
// dump the arguments to check that they are passed
// with proper type
var_dump($item); // value
var_dump($key); // key
echo "\n"; // new line to separate the output between each element
}
echo "-- Using array_walk with default parameters to show array contents --\n";
var_dump(array_walk($fruits, 'test_print'));
echo "-- Using array_walk with one optional parameter to modify contents --\n";
var_dump (array_walk($fruits, 'test_alter', 'fruit'));
echo "-- Using array_walk with default parameters to show modified array contents --\n";
var_dump (array_walk($fruits, 'test_print'));
echo "Done";
?>
--EXPECT--
*** Testing array_walk() : basic functionality ***
-- Using array_walk with default parameters to show array contents --
string(5) "lemon"
string(1) "d"
string(6) "orange"
string(1) "a"
string(6) "banana"
string(1) "b"
string(5) "apple"
string(1) "c"
bool(true)
-- Using array_walk with one optional parameter to modify contents --
string(5) "lemon"
string(1) "d"
string(5) "fruit"
string(6) "orange"
string(1) "a"
string(5) "fruit"
string(6) "banana"
string(1) "b"
string(5) "fruit"
string(5) "apple"
string(1) "c"
string(5) "fruit"
bool(true)
-- Using array_walk with default parameters to show modified array contents --
string(5) "lemon"
string(1) "d"
string(6) "orange"
string(1) "a"
string(6) "banana"
string(1) "b"
string(5) "apple"
string(1) "c"
bool(true)
Done
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