PHP unset array key for empty value not working

Question

For some reason I can not determine why empty array keys aren't being unset. Here is what I have...

PHP

<?php
$attachments = explode('|',$_POST['post_attachments']);
foreach($attachments as $k=>$v)
{
echo 'k = \''.$v."'\n";
 if ($v=='')
 {
  unset($k);
 }
}
print_r($attachments);die();
?>

Output

k = ''

k = 'secret_afound.gif'

k = 'secret_aunlocked.gif'

Array (
[0] => 
[1] => secret_afound.gif
[2] => secret_aunlocked.gif
)

speccode · Accepted Answer · 2013-11-08 22:08:07Z

4

You should do:

foreach ($attachments as $k=>$v) {
    //...magic
    unset($attachments[$k]);
}

answered Nov 8, 2013 at 22:08

speccode

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1 Comment

John Over a year ago

Yeah I'm in such a rush, worked! Thanks! Will accept when the limit expires.

elixenide · Accepted Answer · 2013-11-08 22:08:16Z

0

You are only unsetting $k, not the element in attachments. Try unset($attachments[$k]);

answered Nov 8, 2013 at 22:08

elixenide

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Comments

John · Accepted Answer · 2014-08-18 07:43:34Z

0

I believe you should use unset($attachments[$k]);.

In this scenario I like to think of $k as a temporary variable. Even though you unset it you didn't alter $attachments in anyway.

edited Aug 18, 2014 at 7:43

John

1

answered Nov 8, 2013 at 22:10

Ryan

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