[RESOLVED] array_walk_recursive() with trim() not working for me

[NogDog]

$foo = array('         1234');
array_walk_recursive(
  $foo, 
  create_function(
    '&$v, $k', 
    'trim($v);'
  )
);
print_r($foo);

result:

Array
(
    [0] =>          1234
)

Why are those leading spaces still there? (I'm sure I'm doing something stupid, but I'm just not seeing it.)

[NogDog]

Ah, the good old "rubber duck effect": I needed to change it to:

$foo = array('         1234');
array_walk_recursive(
  $foo, 
  create_function(
    '&$v, $k', 
    '$v = trim($v);'  // added the assignment to $v
  )
);
print_r($foo);

[bradgrafelman]

Reminds me of Request #60625

[dalecosp]

NogDog;11019833 wrote:

Ah, the good old "rubber duck effect":

Do you have such a critter?

In lieu thereof, I've heard that a priest, co-worker, or lady friend might suffice. 😃

[Weedpacket]

Incidentally, why [man]create_function[/man]?

$foo = array('         1234');
array_walk_recursive(
  $foo, function(&$v, $k) {
    $v = trim($v);
  });
print_r($foo);

[NogDog]

Weedpacket;11019855 wrote:

Incidentally, why [man]create_function[/man]?

$foo = array('         1234');
array_walk_recursive(
  $foo, function(&$v, $k) {
    $v = trim($v);
  });
print_r($foo);

Because -- despite evidence to the contrary -- I've used create_function() in these circumstances long before anonymous functions were a sparkle in the PHP developers' minds. 😉

[Bonesnap]

bradgrafelman;11019839 wrote:

Reminds me of Request #60625

I don't understand the person's example.

function returnHello() {
    return "Hello, world!";
}
//Despite its simplicity and perhaps pointlessness of the function call, it still DOES something:
//I also don't see how it relates to the third example in the OP's message.
echo returnHello();

[bradgrafelman]

I didn't say third example, I said the third line. This:

<?php
function returnHello() {
    return "Hello, world!";
}

returnHello();
?>

is the same as this:

<?php
"Hello, world!";
?>

which is the same as this:

<?php

?>

Note that you added an echo statement in your code snippet - this completely defeats the point of the example.

[Bonesnap]

Oops I missed the function call below it. Silly me!