Using preg_match on a multidimensional array to return key values arrays

Question

I have an array that is structured as such:

$data = array(
    "abc"=>array(
            "label" => "abc",
            "value" => "def",
            "type" => "ghi",
            "desc" => "jkl",
            ),
    "def"=>array(
            "label" => "mno",
            "value" => "qrs",
            "type" => "tuv",
            "desc" => "wxyz",
            ),
    );

I want to use preg_match with a foreach loop to perform a search on the arrays contained in $data and return the nested arrays of key value pairs.

What is your question? It is possible what you describe, are you asking for a better solution? — aorcsik
– aorcsik, Commented Jun 8, 2011 at 16:07

user187291 · Accepted Answer · 2011-06-08 18:42:46Z

16

for the googlers out there here's the better code

$data = <as above>
$pattern = "/whatever/";

$matches = array_filter($data, function($a) use($pattern)  {
    return preg_grep($pattern, $a);
});

answered Jun 8, 2011 at 18:42

user187291

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2 Comments

Jonathan Kuhn Over a year ago

Thanks, I had never used either array_filter or preg_grep. * mumbles * I'm off to (re)write some code now...

Jeffrey Over a year ago

This does the same as the accepted answer. The only difference I can see with the accepted answer is the option to break out of the loop at any time. Both answers returns the whole nested array that has a matching value.

Jonathan Kuhn · Accepted Answer · 2011-06-08 16:12:24Z

Something like this?

<?php
$data = array(
    "abc"=>array(
            "label" => "abc",
            "value" => "def",
            "type" => "ghi",
            "desc" => "jkl",
            ),
    "def"=>array(
            "label" => "mno",
            "value" => "qrs",
            "type" => "tuv",
            "desc" => "wxyz",
            ),
    );

$matches = array();
$pattern = "/a/i";  //contains an 'a'
//loop through the data
foreach($data as $key=>$value){
    //loop through each key under data sub array
    foreach($value as $key2=>$value2){
        //check for match.
        if(preg_match($pattern, $value2)){
            //add to matches array.
            $matches[$key]=$value;
            //match found, so break from foreach
            break;
        }
    }
}
echo '<pre>'.print_r($matches, true).'</pre>';
?>

WesleyE · Accepted Answer · 2015-04-17 07:32:40Z

1

If you are using PHP 5.5 and are viewing this question in 2015, this might be a more simple answer:

$elements= array_column($array, 1); //Where 1 is the name of the column or the index
$foundElements = preg_grep("/regex/i", $elements);

answered Apr 17, 2015 at 7:32

WesleyE

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Comments

Murat Colyaran · Accepted Answer · 2021-09-10 18:05:31Z

1

None of the answers above worked on my case, so I'll leave my solution here maybe it can be useful to someone

function multidimensionalArrayScan($arr, $pattern, &$result = []) : Array
    {

        foreach ($arr as $key => $value) {

            if (is_array($arr[$key])) {
                self::multidimensionalArrayScan($arr[$key], $pattern, $result);
                continue;
            }

            $match  = preg_match($pattern, $value);
            if (!empty($match))
                $result[$key] = $value;
        }

        return $result;
    }

$data = <as above>
$pattern = "/whatever/";
multidimensionalArrayScan($data, $pattern);

answered Sep 10, 2021 at 18:05

Murat Colyaran

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Comments

Musa · Accepted Answer · 2012-12-17 04:18:11Z

0

$c=['abccd','123','12qw']; // where u'll search
$a = Array('/a/i', '/\d/i', '/\d+\w/i'); // what is
$b = array_map(function($a,$c){return (preg_match_all($a,$c,$m))? ($m[0][0]) : '';}, $a,$c);
print_r($b);

edited Dec 17, 2012 at 4:18

Musa

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answered Dec 17, 2012 at 4:00

Asani Cms

1

1 Comment

kungfooman Over a year ago

Somebody dares to explain?

litelite · Accepted Answer · 2017-07-23 17:29:57Z

0

preg_grep('/needle/iu', array_column($haystack, "columnName", "keyName" ) );

Case-insensitive unicode grep on column columnName in array $haystack

edited Jul 23, 2017 at 17:29

litelite

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answered Jul 23, 2017 at 15:11

Johnny

1

Comments

Gregory Bologna · Accepted Answer · 2018-10-09 22:36:25Z

0

preg_match_all returns the rows that match a pattern with a specific column name.

$pattern = "/REDUCTION/i";
$reductions = array_filter($data, function($a) use($pattern)  {
    return preg_match_all($pattern, $a['budget']);
});

answered Oct 9, 2018 at 22:36

Gregory Bologna

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