How to check if a multidimensional array is empty or not?

Question

Basically, I have a multidimensional array, and I need to check whether or not it is simply empty, or not.

I currently have an if statement trying to do thi

Answer 1

just to be on the save side you want it to remove the empty lines ? or do you want to return if any array is empty ? or do you need a list which positions are empty ?

this is just a thought and !!! not tested !!!

/**
 * multi array scan 
 * 
 * @param $array array
 * 
 * @return bool
 */
function scan_array($array = array()){
  if (empty($array)) return true;

  foreach ($array as $sarray) {
    if (empty($sarray)) return true;
  } 

  return false;
}

Answer 2

You can use array_push to avoid this situation,

$result_array = array();

array_push($result_array,$new_array);

refer array_push

Then you can check it using if (!empty($result_array)) { }

Answer 3

So simply check for if the first key is present in array or not.

Example

if(!empty($csv_array[1])) 
{   
    //My code goes here if the array is not empty
}

Answer 4

Combine array_filter() and array_map() for result. ( Result Test )

<?php
    $arrayData = [
        '0'=> [],
        '1'=> [
            'question1',
            'answer1',
            'answer2',
            'answer3',
            'answer4'
        ],
        '2'=> [
            'question1',
            'answer1',
            'answer2',
            'answer3',
            'answer4'
        ]
    ];

    $arrayEmpty = [
        '0' => [],
        '1' => [
            '1' => '',
            '2' => '',
            '3' => ''
        ]
    ];

    $resultData = array_filter(array_map('array_filter', $arrayData));
    $resultEmpty = array_filter(array_map('array_filter', $arrayEmpty));

    var_dump('Data', empty($resultData));
    var_dump('Empty', empty($resultEmpty));

Answer 5

You can filter the array, by default this will remove all empty values. Then you can just check if it's empty:

$filtered = array_filter($csv_array);
if (!empty($filtered)) {
  // your code
}

Note: This will work with the code posted in your question, if you added another dimension to one of the arrays which was empty, it wouldn't:

$array = array(array()); // empty($filtered) = true;
$array = array(array(array())); // empty($filtered) = false;

Answer 6

If you don't know the structure of the multidimensional array

public function isEmpty(array $array): bool
{
    $empty = true;

    array_walk_recursive($array, function ($leaf) use (&$empty) {
        if ($leaf === [] || $leaf === '') {
            return;
        }

        $empty = false;
    });

    return $empty;
}

Just keep in mind all leaf nodes will be parsed.