How To Unset The Array If Values Are Empty In PHP

Question

I'm trying to unset the array if the Array values are empty in the multidimensional array. Here's my Array:

Array
    (
        [main] => Array
            (
                [0] => Array
                    (
                        [title] => df
                        [link] => fdf
                    )
    
                [1] => Array
                    (
                        [title] => 
                        [link] => 
                    )
    
                [2] => Array
                    (
                        [title] => 
                        [link] => 
                    )
    
            )
    
    )

My PHP Code:

foreach($array as $key => $value){
  if(empty($value)){
      unset($menuDataJson[$key]);
  }
  
}

But it doesn't work...

You do realise that that code is not processing the inner arrays, but just the outer main array?? — RiggsFolly
– RiggsFolly, Commented Dec 22, 2020 at 13:08

Mikhail Prosalov · Accepted Answer · 2020-12-22 13:06:10Z

2

The problem is that you iterate over the root array, which has only one element 'main'. The following snippet should do the trick.

<?php

$array = [
    'main' => [
        [
            'title' => 'df',
            'link'  => 'fdf',
        ],
        [
            'title' => '',
            'link'  => '',
        ],
        [
            'title' => '',
            'link'  => '',
        ],
    ]
];


foreach ($array['main'] as $key => $value){
    if (empty($value['title'])){
        unset($array['main'][$key]);
    }
}

var_dump($array);

answered Dec 22, 2020 at 13:06

Mikhail Prosalov

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2 Comments

Mikhail Prosalov Over a year ago

That's your array structure, not sure if you can avoid it.

berend Over a year ago

if you don't want to pass, or cannot pass ['main'], you could use this

azibom · Accepted Answer · 2020-12-22 13:08:04Z

0

try it:

foreach ($array['main'] as $key => $value){
    if (empty($value['title']) && empty($value['link'])){
        unset($array['main'][$key]);
    }
}

answered Dec 22, 2020 at 13:08

azibom

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Comments

bueltge · Accepted Answer · 2020-12-23 07:23:34Z

-1

The function array_filter will do that.

$result = array_filter($array);

However, if no callback function is specified, all empty entries of array will be removed, such as "" (an empty string), 0 (0 as an integer), 0.0 (0 as a float), "0" (0 as a string), NULL, FALSE and array() or [] (an empty array).

if you have this case, so add a callback function.

function customFilter($var)
{
    return ($var !== NULL && $var !== FALSE && $var !== "");
}

and use them for the 2nd parameter.

$result = array_filter($array, 'customFilter');

If you have a multidimensional array, so is an enhancement necessary.

function array_filter_recursive($input, $callback = null)
{
    foreach ($input as &$value)
    {
        if (is_array($value))
        {
            $value = array_filter_recursive($value, $callback);
        }
    }
   
    return array_filter($input, $callback);
}

Use this function with your array like array_filter_recursive($array).

edited Dec 23, 2020 at 7:23

answered Dec 22, 2020 at 13:10

bueltge

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2 Comments

Hammad Ahmed khan Over a year ago

check my answer with a little modification it is now working

El_Vanja Over a year ago

This will only operate on the outer level of the array (where there's one key, 'main'). Also, why reinvent the wheel when PHP has the empty function?

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