Php：将字符串连接到所有数组项中

Question

I have this PHP snippet:

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

Output:

Array
(
  [0] => color-red
  [1] => color-green
  [2] => color-blue
)

Is it simpler solution ?

(some array php function like that array_insert_before_all_items($colors,"color-"))?

Thanks

Answer 1

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);