Render arraykeys in php

Question

I want to use a function to render an arraykey so I can use it later. I don't even know if something like this is possible. The function I have for now looks like this

function array_key_render($key){

        $result     = explode('.', $key);
        $num        = count($result);

        for($i=0;$i<$num;$i++){
            $array_key .= [$result[$i]];
        }

        return $array_key;

    }

The mainidea is that I can input i.e. PRODUCT.PRIZE and then I would like to get back something like

['PRODUCT']['PRIZE']

UPDATE: i.e. when I have an array like that with numeric keys :

Array
(
    [PRODUCT] => Array
        (
            [0] => Array
                (
                    [NAME] => jeans
                    [TITLE] => Blop
                    [PRIZE] => Array
                        (
                            [NEW] => 13.23€
                            [0] => 24,40€
                        )

                )

            [1] => Array
                (
                    [NAME] => Pullover
                    [TITLE] => OMG
                    [PRIZE] => Array
                        (
                            [0] => 13.23€
                            [NEW] => 24,40€
                        )

                )

        )

)

When I would go for PRODUCT.PRIZE it would return false with my choosen answer. How could I make some kind of wildcard for all numeric keys to make them match? Something like PRODUCT.*.PRIZE

The whole thing is for a little templateengine. If you have some pointers or hints for me, would be great.

you want your array to look like this? array("product" => "prize") ? — srakl
– srakl, Commented Jul 19, 2013 at 20:50

Jake N · Accepted Answer · 2013-07-19 21:04:43Z

2

Your function returns a string, so this will not work

$a = array("PRODUCT" => array("PRICE" => 10.99)); 
$key = array_key_render("PRODUCT.PRICE");
echo $a[$key];

I can see where you are going with this though.

<PRE>
<?php

// Obtain an array of keys based on our dotted string
function array_key_render($key)
{
  $result = explode('.', $key);

  return $result;

}

// iterate over the array using the known keys trying to find the right element
function array_access($key, $_array)
{
    $array = $_array;
    $keys = array_key_render($key);

    $found_keys = 0;

    foreach($keys as $k)
    {
        if(isset($array[$k]))
        {
            $array = $array[$k];
            $found_keys++;
        }
        // Oh no, we are lost, break, the keys were not found
        else
        {
            break;
        }
    }

    // Check that we found all the keys we were looking for
    if($found_keys == count($keys))
        return $array;

    return false;
}

$a = array("PRODUCT" => array("PRICE" => 10.99)); 

$key = "PRODUCT.PRICE";

var_dump(array_access($key, $a));

$key = "PRODUCT.NOWAY";

var_dump(array_access($key, $a));

$a = array("PRODUCT" => array("PRIZE" => "REP"));

$key = "PRODUCT.PRIZE";

var_dump(array_access($key, $a));

answered Jul 19, 2013 at 21:04

Jake N

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3 Comments

Johnny000 Over a year ago

That's the best way, I was on a wooden path with my way of approaching the whole thing. Thank you

Johnny000 Over a year ago

Do you know how I could incloude some kind of wildcard function for numeric keys?

Johnny000 Over a year ago

Updated :) I think I need to catch the wildcard while parsing the keys, but then I dont now whats the best approach to loop through the array elements and save them, since from there on the parser would need to parse for each numeric key that was wildcarded

Joe Minichino · Accepted Answer · 2013-07-19 20:59:41Z

1

I haven't tested this code so try it out first. Anyway: firsst of all change the for loop to this:

for($i=0;$i<$num;$i++){
  $array_key .= "[" . $result[$i] ."]";
}

Once you have a string representation of the variable you can call eval( ) on the generated string. Most templating engines make use of eval, however beware the numerous security concerns.

answered Jul 19, 2013 at 20:59

Joe Minichino

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1 Comment

Johnny000 Over a year ago

Thanks! Didn't know eval()

Sumoanand · Accepted Answer · 2013-07-19 21:04:50Z

1

Quick solution, start from the last element of $result array & add it to $array index:

$array = $value;
for($i=$num-1;$i>=0;$i--){
            $array[$result[$i]] = $array;
}

So, if input is PRODUCT.PRIZE.BLA1.BLA2, output will be $array[PRODUCT][PRIZE][BLA1][BLA2]

answered Jul 19, 2013 at 21:04

Sumoanand

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Comments

srakl · Accepted Answer · 2013-07-19 20:58:25Z

0

try this

function array_key_render($key){

        $result     = explode('.', $key);
        $num        = count($result);
        $arr = array();

        for($i=0;$i<$num;$i++){
            $arr[$result[$i]] = array("price" => $i);
        }

    }

i'm assuming your $key looks something like this tho. "1.2.3.4.5"

FYI: not tested and don't quite get what you trying to do... hope this helps

answered Jul 19, 2013 at 20:58

srakl

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Comments

luttkens · Accepted Answer · 2013-07-19 21:06:43Z

0

I think this is want you want

function array_key_render($key){
  $keys = array_reverse(explode('.', $key));
  $array = "somevalue";
  foreach ($keys as $key){
    $array = array($key => $array);
  }
  return $array;
}

answered Jul 19, 2013 at 21:06

luttkens

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Comments

AlexP · Accepted Answer · 2013-07-19 21:42:34Z

0

$string  = 'This.is.my.string';
function stringArray($string = '', $result = array()) 
{
  $keys = explode('.', $string);
  foreach(array_reverse($keys) as $key) {
    $result = array_fill_keys(array($key), $result);
  }
  return $result;
}
print_r(stringArray($string));

answered Jul 19, 2013 at 21:42

AlexP

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