str_replace是否通过多维数组？

Question

I have an array setup like so:

Array
(
[0] => Array
    (
        [value1] => John Doe
        [value2] => Father
        [value3] => 
        [value4] => http://www.website.my.com
        [value5] => 
        [value6] => 
    )

[1] => Array
    (
        [value1] => Jane Doe
        [value2] => Mother
        [value3] => 
        [value4] => http://www.website.my.com
        [value5] => 
        [value6] => 
    )

[2] => Array
    (
        [value1] => Sara Smith
        [value2] => Daughter
        [value3] => 
        [value4] => http://www.website.my.com
        [value5] => 
        [value6] => 
    )
)

and I'm trying to use str_replace to remove the "my." out of the value4 field of these arrays. str_replace("my.", "", $myarray); but it's not changing anything. Does str_replace work on multidimensional arrays?

Answer 1

No, it works on strings, or single dimension arrays.... you could use it through the callback in an array_walk_recursive though

array_walk_recursive(
    $myarray,
    function (&$value) {
        $value = str_replace('.my', '', $value);
    }
);

Answer 2

You can use array_walk_recursive() http://php.net/manual/en/function.array-walk-recursive.php to perform a replacement on every sub-element (Note: Callback is just triggered for leafs (non-arrays)):

$myArray = array(0 => "my.test", 2=> array("test" => "my.thing"));

array_walk_recursive($myArray, "removeMy");

function removeMy(&$element, $index){
   $element = str_replace("my.", "", $element);
}


print_r($myArray); // Array ( [0] => test [2] => Array ( [test] => thing ) ) 

if the replacement should only appear on value4 keys - add that as a condition:

function removeMy(&$element, $index){
  if ($index === "value4"){
       $element = str_replace("my.", "", $element);
  }
}

Answer 3

Make it easy

foreach ($array as &$item)
   $item['value4'] = str_replace('my.', "", $item['value4']);