How to remove empty and null values from an array in php?

Question

I want to remove the empty and null values from $listValues array. Here I am removed the empty values using array_filter. Sample Code:

$listValues = array("one", "two", "null","three","","four","null");
$resultValues = array_filter($listValues);

echo "<pre>";
print_r($resultValues);
echo "</pre>";

Result:

Array ( [0] => one [1] => two [2] => null [3] => three [5] => four [6] => null )

But I want

Array ( [0] => one [1] => two [3] => three [5] => four )

Any advice greatly appreciated.

Just apply an anonymous function to array_filter() to filter out what you want — Rizier123
– Rizier123, Commented Jan 14, 2016 at 4:38

Vigneswaran S · Accepted Answer · 2016-01-14 04:54:38Z

6

try this : use array_diff() function compares the values of two (or more) arrays, and returns the differences. to remove null and "" . if you need to remove some more field then add that values inside the array

<?php
$listValues = array("one", "two", "null","three","","four","null");
echo "<pre>";
$a=array_values(array_diff($listValues,array("null","")));
print_r($a);
echo "</pre>";
?>

output :

Array
(
    [0] => one
    [1] => two
    [2] => three
    [3] => four
)

refer http://www.w3schools.com/php/func_array_diff.asp

edited Jan 14, 2016 at 4:54

answered Jan 14, 2016 at 4:47

Vigneswaran S

2,0941 gold badge22 silver badges33 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Sanjay Kumar N S · Accepted Answer · 2016-01-14 04:43:12Z

1

Try array_filter with second parameter as a user defined function like this:

$listValues = array("one", "two", "null","three","","four","null");
print_r(array_filter($listValues, "filter"));
function filter($elmnt) {
    if ($elmnt != "null" && $elmnt != "" ) {
        return $elmnt;
    }
}

answered Jan 14, 2016 at 4:43

Sanjay Kumar N S

4,7595 gold badges25 silver badges41 bronze badges

Comments

Waqas Shahid · Accepted Answer · 2016-01-14 04:46:58Z

0

Use this code, First I corrected the index of an array, then unset null values from an array then corrected array indexes again:

$listValues = array("one", "two", "null","three","","four","null");
$listValues = array_values($listValues);
$temp = $listValues;

for($loop=0; $loop<count($listValues); $loop++){
    if($listValues[$loop] == "" || $listValues[$loop] == "null"){
        unset($temp[$loop]);
    }
}

$listValues = $temp;
$listValues = array_values($listValues);
echo "<pre>";
print_r($listValues);
echo "</pre>"; die;

But, if you want same indexes to get this output:

Array ( [0] => one [1] => two [3] => three [5] => four )

Then don't use this before <pre>:

$listValues = array_values($listValues);

answered Jan 14, 2016 at 4:46

Waqas Shahid

1,0501 gold badge7 silver badges22 bronze badges

Collectives™ on Stack Overflow

How to remove empty and null values from an array in php?

3 Answers 3

Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related