how to find empty value for specific key in multidimensional array

Question

i have array like this

<?php
$array =
    array
    (
        array (
            0 => 1,
            1 => 'php',
            2 => 11,
            3 => 11,
            4 => 11,
            5 => 11,
            6 => 11,
        ),
        array (
            0 => 1,
            1 => 'php',
            2 => 11,
            3 => 11,
            4 => 11,
            5 => 11,
            6 => ,
        ),

    );

and i want to search in this multi-array to find if the key [6] => is empty.if it was empty in any array return false so how to do this

foreach($array as $item)
{
    foreach($item as $key=>$value)
    {
        print($key);
        if($key=="6" && $value==NULL)
        {
            echo "found";
            return false;
        }else{
            echo "not found";
            return true;
        }
    }
}

it is should give me found message because i have empty value in key 6 but it is not give me this message — user1080247
– user1080247, Commented Feb 24, 2015 at 15:22

Alex · Accepted Answer · 2020-03-11 14:17:50Z

1

$empty = false;
foreach($array as $item)
{
    if(empty($item[6]))
    {
            $empty=true;
            break;
    }
}
return $empty;

edited Mar 11, 2020 at 14:17

answered Feb 24, 2015 at 15:27

Alex

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2 Comments

Rubin Anbin Over a year ago

if condition is not closed

Alex Over a year ago

@RubinAnbin fixed. Thank you.

Adam Solymos · Accepted Answer · 2015-02-24 15:51:38Z

First, it's recommended to use only one return in a function, so define a boolean value, and turn it to TRUE when the condition satisfies.
Second, use break to stop the cycle(s) running (saves runtime) http://php.net/manual/en/control-structures.break.php
Third, check keys and values appropriately. Your keys are numeric and you are comparing to a string "6". Use empty() if you are interested in that the value is an empty-ish value. Be aware that a numeric zero is an empty value. If you are specifically interested in NULL value, use === operator http://php.net/manual/en/function.empty.php http://php.net/manual/en/language.operators.comparison.php
+1 See Yoda-style conditions http://en.wikipedia.org/wiki/Yoda_conditions

++1 Use K&R style indent, or don't use it. But do not try! ;) http://en.wikipedia.org/wiki/Indent_style#K.26R_style

$found = false;
foreach ($array as $item) {
    foreach ($item as $key => $value) {
        print($key);
        if (6 == $key && NULL === $value) { // or use 'empty($value)'
            echo "found";
            $found = true;
            break 2;
        } else {
            echo "not found";
        }
    }
}
return !$found;

AbraCadaver · Accepted Answer · 2015-02-24 16:10:15Z

0

Here's an alternate for PHP >= 5.5.0 that checks for '', 0, null and false:

return !array_diff($six = array_column($array, 6), array_filter($six));

answered Feb 24, 2015 at 16:10

AbraCadaver

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