08-17-2017
And you want to pass one single fruit only to the function, not two or even more? Had you said that from the beginning, much effort could have been avoided!
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LEARN ABOUT PHP
array_walk_recursive
ARRAY_WALK_RECURSIVE(3) 1 ARRAY_WALK_RECURSIVE(3)
array_walk_recursive - Apply a user function recursively to every member of an array
SYNOPSIS
bool array_walk_recursive NULL (array &$array, callable $callback, [mixed $userdata])
DESCRIPTION
Applies the user-defined $callback function to each element of the $array. This function will recurse into deeper arrays.
PARAMETERS
o $array
- The input array.
o $callback
- Typically, $callback takes on two parameters. The $array parameter's value being the first, and the key/index second.
Note
If $callback needs to be working with the actual values of the array, specify the first parameter of $callback as a refer-
ence. Then, any changes made to those elements will be made in the original array itself.
o $userdata
- If the optional $userdata parameter is supplied, it will be passed as the third parameter to the $callback.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
EXAMPLES
Example #1
array_walk_recursive(3) example
<?php
$sweet = array('a' => 'apple', 'b' => 'banana');
$fruits = array('sweet' => $sweet, 'sour' => 'lemon');
function test_print($item, $key)
{
echo "$key holds $item
";
}
array_walk_recursive($fruits, 'test_print');
?>
The above example will output:
a holds apple
b holds banana
sour holds lemon
You may notice that the key ' sweet' is never displayed. Any key that holds an array will not be passed to the function.
SEE ALSO
array_walk(3), information about the callback type.
PHP Documentation Group ARRAY_WALK_RECURSIVE(3)