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Use array_map() to apply a function to every element of an array

Say you have an array that's just a little messy and you need to apply a function to every value in that array... you probably want and not

To do this:

  $fixed = array();
  foreach ($predicates as $predicate) {
    $fixed[] = trim($predicate);
  $predicates = $fixed;

  $predicates = array_map('trim', $predicates);

No good: array_walk($predicates, 'trim');

as evidenced by


array (
0 => 'this:will',
1 => 'work:now',
2 => 'is:not',
3 => 'that:great',
4 => 'so:close',
5 => 'this:works',
6 => 'cleaner:now',


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