how to remove empty element from array

[Dollar]

HI I got so many empty element in array( contain only whitespace). anyone know how to remove it?
$my[0] =
$my[1] = 5.21
$my[2] = 425
$my[3] =
$my[4] =
$my[5] = 75

I want to remove 0,3,4,5. I did try several way but really get stuck. Anyone help me please.

[BigBadKev]

Hi Dollar,

This is my first time replying so be gentle, try using the unset function like this

PHP Code:

$my = array();
$my[0] = null;
$my[1] = 5.21;
$my[2] = 425;
$my[3] = null;
$my[4] = null;
$my[5] = 75;
foreach ($my as $key => $value) {
  if (is_null($value)) {
    unset($my[$key]);
  }
}
foreach ($my as $key => $value) {
  echo   "  $key : $value <br>";
}
//....out put.....
1 : 5.21
2 : 425
5 : 75

//but if you want to re-order the array lets try this, only draw back
//is we are creating a new array
$newMy = array();
$i = 0;
foreach ($my as $key => $value) {
  if (!is_null($value)) {
    $newMy[$i] = $value;
    $i++;
  }
}
foreach ($newMy as $key => $value) {
  echo   "  $key : $value <br>";
}
//....out put....
0 : 5.21
1 : 425
2 : 75


I really hope this helps you a little, I actually would like to know how we keep the same array if its possible?

BBK

[dopp]

PHP Code:

foreach($array as $key => $value) {
  if($value == "") {
    unset($array[$key]);
  }
}
$new_array = array_values($array);


and voila, $new_array should only contain entries that are not empty & the indexes of the array are reordered so that they are not missing indexes!

[Dollar]

Thank you so much, you guys. It works very well. thank you..Dollar

[BigBadKev]

Hi dollar,

just be very careful with "" and null as they are two different things, eg look at this array below

PHP Code:

$my = array();
$my[0] = null;
$my[1] = 5.21;
$my[2] = 425;
$my[3] = null;
$my[4] = "";
$my[5] = 75;

//note element [4] is empty not a null value

$newMy = array();
$i = 0;
foreach ($my as $key => $value) {
  if (!is_null($value)) {
    $newMy[$i] = $value;
    $i++;
  }
}
foreach ($newMy as $key => $value) {
  echo   "  $key : $value <br>";
}
//....out put ....
0 : 5.21
1 : 425
2 :
3 : 75

/*
so we still have a empty element at [2]
but if we change the line below
if (!is_null($value)) {
with this one
if ((!is_null($value)) && ($value !== "")) {
our out put is this
0 : 5.21
1 : 425
2 : 75

*/


whats important here is that null and "" are treated as two different values, not sure if you knew this.

Have fun

BBK

[KingIsulgard]

[MOD]Before anyone else replies, please note that this is an over 4-year-old thread. -- NogDog[/MOD]

If you also want to delete values which are not empty but equal to "" then just use this foreach:

PHP Code:

    foreach ($myarr as $key => $value) {
      if (is_null($value) || $value=="") {
        unset($myarr[$key]);
      }
    }


By adding or $value=="" to the if function he will also remove the empty strings .

[raahool_16]

TRY THIS---

array_filter($my);

[saami123]

[MOD]Before replying to this thread, note the NogDog's edit made about half a year ago. -- Weedpacket[/MOD]

Here remove the empty values and arraged the array in correct order


$ii=0;
foreach($list as $key_null=>$val_null){
if($val_null){
$list1[$ii]=$val_null;$ii++;
}
}

by saami

[MOD]Besides, array_values(array_filter($list)).[/MOD]

[Shane10101]

Hey gang,

Could I get someone to explain what this line is doing. I'm learning php fast, but still have a ways to go!

" $key => $value "

Here's the context (from this tread, c. 2003):

foreach ($thisArray as $key => $value) {
if (is_null($value) || $value == "") {
unset ($thisArray[$key]);
}
}

The part I'm having trouble understanding is the " => " I don't see it listed as an operator in the php list on devguru.com (my hero, btw). Is this just a way of drilling-down into an associative array?

Also, why is it necessary to act on "$thisArray" as "$key"? Why not just look directly at $thisArray?

Thanks in advance for any help!

Newbie

[Weedpacket]

Originally Posted by Shane10101

Is this just a way of drilling-down into an associative array?

Yes. $key isn't the same thing as $thisArray. It's one key from the array. The page you want to look at is the one in the PHP manual on foreach.

[Shane10101]

I'm still stuck on the "=>" part, but that helps.

[laserlight]

I'm still stuck on the "=>" part

It is just array syntax to denote key => value. As such, you see it used for foreach loops, and when initialising an associative array:

PHP Code:

$array = array('key1' => 'value1', 'key2' => 'value2');


[isam4m]

try
array_multisort($array);