Remove array from inside a 2d array where value is equal to

Question

I have the following array structure:

  0 => 
    array
      'all_sessions_available' => boolean true
      'all_sessions_unavailable' => boolean false
  ....
  22 => 
    array
      'all_sessions_available' => boolean false
      'all_sessions_unavailable' => boolean true

I am trying to remove the full array element if all_sessions_unavailable = true

I have the following code:

for ($i = 0; $i <= count($processData); $i++) {
    if ($processData[$i]['all_sessions_unavailable'] === true) {
        unset($processData[$i]);
    }
}

However it removes all but the last array (22 in this case which happens to be the last array in the overall array if that makes any difference)

Is there something I'm doing wrong?

not 100% sure on this but try iterating from the other side... I think it is changing the indexes as it unsets so instead do "for($i=count($processData);$i>=0;$i--)" — hackartist
– hackartist, Commented May 13, 2012 at 23:13

hackartist · Accepted Answer · 2012-05-13 23:22:00Z

1

I think it is changing the indexes as it unsets so instead do

 for($i=count($processData);$i>=0;$i--)

answered May 13, 2012 at 23:22

hackartist

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deceze · Accepted Answer · 2012-05-13 23:24:57Z

1

An alternative approach for PHP 5.3+:

$processData = array_filter($processData,
                            function ($i) { return !$i['all_sessions_unavailable']; });

answered May 13, 2012 at 23:24

deceze♦

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Comments

Christian · Accepted Answer · 2012-05-13 23:25:36Z

1

foreach($processData as $index=>$session){
    if($session['all_sessions_unavailable']){
        unset($processData[$index]);
    }
}

Why don't you just use foreach(), it's probably one of the best features in PHP...

Also, unless all_sessions_unavailable could contain values other than boolean, you don't have to match it against an exact true.

answered May 13, 2012 at 23:25

Christian

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