Search multidimensional array using regular expressions in PHP and return keys [closed]

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This issue is related to following issue: Search multidimensional array in PHP and return keys

I have following array I would like to search for strings using e.g. regular expressions:

[390] => Array
(
    [0] => hammer
    [1] => Properties
    [2] => tools, hammer, properties
    [3] => 
    [4] => done
    [png] => Array
        (
            [0] => hammer_16x.png
            [1] => hammer_32x.png
        )

    [eps] => Array
        (
            [0] => hammer_16x.eps
            [1] => hammer_32x.eps
        )

    [ico] => Array
        (
            [0] => hammer.ico
        )

)

I would like to especially search these values:

 [0] => hammer
 [1] => Properties
 [2] => tools, hammer, properties
 [3] => 
 [4] => done

e.g. the user shall have the possibility to find this array key when searching for "ham", "tools", "amm" etc.

I tried to adapt the solution posted in the post above but did not manage it. I've also found a solution using array_map, but this did not enable me to explicitly search in a specific attribute (e.g. I would like to further on limit a search to the first index in the array, here [0] => hammer):

$result= array_map('unserialize', preg_filter('/'.$searchterm.'/', '$0', array_map('serialize', $array)));

Your ideas are welcome :) Thanks!

I find this question to be unclearly asked. Are you not actually interested in a recursive solution, but seeking to search ONLY the non-array elements of the row (not search png, eps, and ico elements)? You want to search with ham, tools, amm, but you only want the first match? [0] => 'hammer'? — mickmackusa
– mickmackusa ♦, Commented Mar 25, 2024 at 1:12

Frugan · Accepted Answer · 2015-03-15 00:52:50Z

1

You may use this recursive function of preg_grep:

function preg_grep_recursive( $pattern, $input, $flags = 0, &$output = array() )
{
    foreach($input as $key => $val) {
        if(is_array($val)) {
            preg_grep_recursive($pattern, $val, $flags, $output);   
        } else {
            $output[] = $val;
        }
    }

    return preg_grep($pattern, $output, $flags);
}

answered Mar 15, 2015 at 0:52

Frugan

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hindmost · Accepted Answer · 2014-03-13 19:50:59Z

0

Try the following solution. It doesn't use regular expressions, it use plain string search instead. However it allows some flexibility as you want.

function filter($array, $filter_elem) {
    return array_filter($array, function ($v) use($filter_elem) {
        return
            count(array_udiff_assoc($filter_elem, $v, function ($a, $b) {
                if (!is_string($a) || !is_string($b)) return $a == $b? 0 : 1;
                return stripos($b, $a) !== false || stripos($a, $b) !== false? 0 : 1;
            })) == 0;
    });
}

$array = array(
    '390' => array(
        '0' => 'hammer',
        '1' => 'Properties',
        '2' => 'tools, hammer, properties',
        '3' => false,
        '4' => 'done',
        'png' => array(
            '0' => 'hammer_16x.png',
            '1' => 'hammer_32x.png',
        ),
        'eps' => array(
            '0' => 'hammer_16x.eps',
            '1' => 'hammer_32x.eps',
        ),
        'ico' => array(
            '0' => 'hammer.ico',
        ),
    ),
);

$filter_elem = array(
    '1' => 'prop',
    '2' => 'hammer',
    '3' => false,
    '4' => 'done',
);

print_r(filter($array, $filter_elem));

answered Mar 13, 2014 at 19:50

hindmost

7,1713 gold badges33 silver badges42 bronze badges

2 Comments

Stephan Over a year ago

The example works fine! I've still tried to combine it with reg ex - also searching whole google - but did not find a solution yet. Even using OR search seems not to work.

mickmackusa Over a year ago

array_udiff_assoc() expects a 3-way comparison because it is not only filtering, it is sorting as well.

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