Looping Through Multi-Dimensional Array in PHP

Question

I've looked up a bunch of similar examples but still can't seem to figure out how loop through and echo the values from this array. Should be simple, but I'm dense. Help is appreciated.

array(2) { ["legend_size"]=> int(1) ["data"]=> array(2) { ["series"]=> array(2) { [0]=> string(10) "2014-01-17" [1]=> string(10) "2014-01-18" } ["values"]=> array(1) { ["Begin Session"]=> array(2) { ["2014-01-17"]=> int(1073) ["2014-01-18"]=> int(1122) } } } }

I'm trying to return the int values for the "values" array.

Have you tried recursion with type checking? This may be helpful: stackoverflow.com/questions/15917022/… — Josh Austin
– Josh Austin, Commented Jan 20, 2014 at 4:00
@josh-austin You can probably tell from the question itself I'm pretty novice, so recursion is out of my league right now. — Jeff Solomon
– Jeff Solomon, Commented Jan 20, 2014 at 4:03

Josh Austin · Accepted Answer · 2014-01-20 04:21:38Z

1

Given the name of your array is, for the sake of example, $mdarr, and that the construction of the array is going to be roughly the same every time, it is as simple as:

$values_i_want = $mdarr['data']['values'];

If the values array you are looking for is going to be in different array depths in different cases, recursion combined with type checking will do the trick:

//returns values array or nothing if it's not found
function get_values_array($mdarr) {
    foreach ($mdarr as $key => $val) {
        if ($key == 'values') {
            return $val;
        } else if (is_array($val)) {
            return get_values_array($val);
        }
    }
}

answered Jan 20, 2014 at 4:21

Josh Austin

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emsoff · Accepted Answer · 2014-01-20 04:21:07Z

0

Use the following as a base. I reconstructed your array so I could mess around with it.

$turtle = array('legend_size' => 'int(1)', 'data' =>array('series' => array('string(10) "2014-01-17"', '[1]=> string(10) "2014-01-18"'), 'values' => array('Begin_Session' =>array('2014-01-17' => 'int(1073)', '2014-01-18' => 'int(1122)'))));

// This is where you "navigate" the array by using [''] for each new array you'd like to traverse. Not sure that makes much sense, but should be clear from example.
foreach ($turtle['data']['values']['Begin_Session'] as $value) {
    $match = array();
// This is if you only want what's in the parentheses. 
    preg_match('#\((.*?)\)#', $value, $match);
    echo $match[1] . "<br>";
}

answered Jan 20, 2014 at 4:21

emsoff

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SuperTron · Accepted Answer · 2014-01-20 04:24:55Z

If the array structure is not going to change, and you just want the int values inside values, you could do the following:

//Create array
$some_array = array( 
    "legend_size" => 5, 
    "data" => array( 
        "series" => array(0 => "2014-01-17", 1 => "2014-01-18" ) 
        "values" => array(
            "Begin Session" => array("2014-01-17" => 1000, "2014-01-18" => 1000)
        )
    )
);

//Get values
foreach($some_array['data']['values'] as $key => $value)
{
    if(is_array($value))
    {
        echo $key . " => ";

        foreach($value as $key2 => $value2)
        {
             echo "   " . $key2 . " => " . $value2;
        }
    }

    else
    {
        echo $key . " => " . $value;
    }
}

This will give you an output like this:

Begin Session =>
    2014-01-17 => 1000
    2014-01-18 => 1000

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