up vote 0 down vote favorite

I have http://codepad.org/69O7bSbC

<?php
  $colors = array('red','green','blue');
  foreach ($colors as &$item)
  {
    $item = 'color-'.$item;
  }
  print_r($colors);
?>  

Output: 
Array
(
  [0] => car-red
  [1] => car-green
  [2] => car-blue
)

Is it simpler solution (some array php function like that array_insert_before_all_items($ colors,"car-"))?

Thanks

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2 Answers

up vote 3 down vote accepted

The method array_walk will let you 'visit' each item in the array with a callback. With php 5.3 you can even use anonymous functions

Pre PHP 5.3 version:

function carPrefix(&$value,$key) {
  $value="car-$value";
}
array_walk($colors,"carPrefix");
print_r($colors);

Newer anonymous function version:

array_walk($colors, function (&$value, $key) {
   $value="car-$value";
});
print_r($colors);
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up vote 1 down vote

Try this:

$colors = array('red','green','blue');

function prefix_car( &$item ) {
    $item = "car-{$item}";
}

array_walk( $colors, 'prefix_car');

It should work the same way you're doing it, albeit somewhat more sternly; array_walk gives an inkling more flexibility than manually looping.

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