PHP arrays & variable variables

Question

With an array $s_filters that looks like this (many different keys possible):

Array
(
    [genders] => m
    [ages] => 11-12,13-15
)

How can I programatically convert this array to this:

$gender = array('m');
$ages = array('11-12','13-15');

So basically loop through $s_filters and create new arrays the names of which is the key and the values should explode on ",";

I tried using variable variables:

foreach( $s_filters as $key => $value )
{
    $$key = array();
    $$key[] = $value;
    print_r($$key);
}

But this gives me cannot use [] for reading errors. Am I on the right track?

user142162 · Accepted Answer · 2011-11-05 13:07:40Z

2

The following code takes a different approach on what you're trying to achieve. It first uses the extract function to convert the array to local variables, then loops though those new variables and explodes them:

extract($s_filters);

foreach(array_keys($s_filters) as $key)
{
    ${$key} = explode(",", ${$key});
}

answered Nov 5, 2011 at 13:07

user142162

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Comments

You Qi · Accepted Answer · 2011-11-05 13:15:03Z

0

$s_filters = Array
(
    "genders" => "m",
    "ages" => "11-12,13-15"
);

foreach($s_filters as $key=>$value)
{
    ${$key} = explode(',', $value);
}

header("Content-Type: text/plain");
print_r($genders);
print_r($ages);

answered Nov 5, 2011 at 13:15

You Qi

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Comments

Mārtiņš Briedis · Accepted Answer · 2011-11-05 13:15:10Z

0

$gender = $arr['gender'];

What you want there is unreadable, hard to debug, and overall a bad practice. It definitely can be handled better.

answered Nov 5, 2011 at 13:15

Mārtiņš Briedis

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