Replace value in multi dimension array - php

Question

I have array format like:
Array
(
[Australia] => Array
(
[0] => [1990,0.01],
[1] => [1991,0.02],
[2] => [1992,0.02],
[3] => [1993,0.02],
[4] => [1994,0.02],
[5] => [1995,0.02],
[6] => [1996,0.02],
[7] => [1997,0.02],
[8] => [1998,0.02],
[9] => [1999,0.02],
[10] => [2000,0.02],
[11] => [2001,0.02],
[12] => [2002,0.02],
[13] => [2003,0.02],
[14] => [2004,0.02],
[15] => [2005,0.02],
[16] => [2006,0.02],
[17] => [2007,0.02],
[18] => [2008,0.02],
[19] => [2009,empty],
[20] => [2010,empty],
[21] => [2011,empty],
[22] => [2012,empty],
[23] => [2013,empty],
[24] => [2014,empty],
[25] => [2015,empty]
)
[Pakistan] => Array
(
[0] => [1990,0.00],
[1] => [1991,0.00],
[2] => [1992,0.00],
[3] => [1993,0.00],
[4] => [1994,0.00],
[5] => [1995,0.00],
[6] => [1996,0.00],
[7] => [1997,0.00],
[8] => [1998,0.00],
[9] => [1999,0.00],
[10] => [2000,0.00],
[11] => [2001,0.00],
[12] => [2002,0.00],
[13] => [2003,0.00],
[14] => [2004,0.01],
[15] => [2005,0.01],
[16] => [2006,0.00],
[17] => [2007,0.00],
[18] => [2008,0.00],
[19] => [2009,empty],
[20] => [2010,empty],
[21] => [2011,empty],
[22] => [2012,empty],
[23] => [2013,empty],
[24] => [2014,empty],
[25] => [2015,empty]
)
)
and i want to replace 'empty' with 0 without change the array structure and elements position. I stuck how to do..

Answer 1

You can use array_walk_recursive function:
function replace_empty(&$item, $key) {
$item = str_replace('empty', '0', $item);
}
array_walk_recursive($your_array, 'replace_empty');

Answer 2

You could use the array_walk_recursive function, with a callback function that would replace empty by 0.
For example, considering your array is declared this way :
$myArray[0] = array(23, empty, 43, 12);
$myArray[1] = array(empty, empty, 53, 19);
Note : I supposed you made a typo, and your arrays are not containing only a string, but several sub-elements.
You could use this kind of code :
array_walk_recursive($myArray, 'replacer');
var_dump($myArray);
With the following callback functon :
function replacer(& $item, $key) {
if ($item === empty) {
$item = 0;
}
}
Note that :
the first parameter is passed by reference !
which means modifying it will modify the corresponding value in your array
I'm using the === operator for the comparison
And you'd get the following output :
array(
0 =>
array
0 => int 23
1 => int 0
2 => int 43
3 => int 12
1 =>
array
0 => int 0
1 => int 0
2 => int 53
3 => int 19)

Answer 3

I would foreach in both indices (not tested):
foreach($array as $country){
foreach($country as &$field){
if($field[1] == 'empty'){
$field[1] = 0;
}
}
}
(I assume empty is a string)
EDIT:
If this [1990,0.00] is not an array but a string, you could use str_replace instead
foreach($array as $country){
foreach($country as &$field){
$field = str_replace('empty', '0.00', $field);
}
}
}