Is there a reliable PHP one liner to suffix/prefix array values?

Question

I need to suffix array values which will in fact be a tag CSS, so I need to suffix one array with :hover and another with :focus

$elements = array('.one','.two','.three');

desired new arrays

$helements = array('.one:hover','.two:hover','.three:hover');
$felements = array('.one:focus','.two:focus','.three:focus');

I know I can do it with a loop but question is, is there a fast one liner for this?

You can probably use `array_map` or even `array_walk` for this. — gen_Eric, May 25 '16 at 16:17
Why are you looking for a "fast oneliner"? Do you think it'll work any better or faster than a plain old loop? — CodeCaster, May 25 '16 at 16:22
@CodeCaster , good question , is array_map, array_walk going to be faster than the loop? — Benn, May 25 '16 at 16:28
The real question is: are you going to notice it? If you really want to know, benchmark it. Otherwise, go for the most readable code. Chances are that a few string operations are going to have an immeasurably small impact on your entire code. — CodeCaster, May 25 '16 at 16:29
@CodeCaster, is much more that 3 , that was just an example. Working on CSS generator and it can be well over 100 elements which is not much but for a loop search /replace it might be. — Benn, May 25 '16 at 16:31
You can use regex. like [Regex to Add a postfix to each item of a PHP array](http://stackoverflow.com/questions/42691789/regex-to-add-a-postfix-to-each-item-of-a-php-array) — MahdiY, Mar 09 '17 at 13:22

score 5 · Accepted Answer · answered May 25 '16 at 16:17

5

$newelements = array_map(function($x){ return $x . ':hover'; }, $elements);

answered May 25 '16 at 16:17

cmorrissey

score 4 · Answer 2 · edited May 23 '17 at 12:25

You can alter the array itself (like my solution) or create a new array like in the other answer. Your choice. ;)

You can just pass the $item as reference in order to change the original array directly.

$array = ["test1", "test2", "test3"];
array_walk($array,function(&$item) {$item .= ':hover';});

The result is:

var_dump($array);

array(3) {
  [0]=>
  string(11) "test1:hover"
  [1]=>
  string(11) "test2:hover"
  [2]=>
  string(11) "test3:hover"
}

2 Answers2