CODEWITHSUNDEEP
phparraysunset
Deano
Deano

Reputation: 12190

Remove key from array if the element starts with certain value

How can I remove element that starts with TOR example key [27].

Array
(
    [1] => memory_target
    [2] => vif_2_rx
    [3] => vif_2_tx
    [4] => memory
    [5] => vbd_xvda_read
    [6] => vbd_xvda_write
    [7] => vbd_xvdd_read
    [8] => vbd_xvdd_write
    [9] => vif_1_rx
    [10] => vif_1_tx
    [11] => vif_0_rx
    [12] => vif_0_tx
    [13] => cpu0
    [27] =>  TOR-SRV65
)

This is what I have tried so far. 

if(($key = array_search($del_val, $messages)) !== false) {
    unset($messages[$key]);
}

But haven't been able to get it to work!

Upvotes: 1

Views: 1594

Answers (3)

Florin
Florin

Reputation: 6169

I am using this function to delete a key from array 

function removeValueFromArray($array, $key, $value){
   foreach($array as $subKey => $subArray){
      if($subArray[$key] == $value){
      unset($array[$subKey]);
      }
   }
   return $array;
}

This function remove the key from array based on certain value and return final array

Upvotes: 0

Rizier123
Rizier123

Reputation: 59681

You can simply array_filter() the elements out which have TOR at the start like this:

$messages = array_filter($messages, function($v){
    return !(substr(trim($v), 0, 3) === "TOR");
});

Case insensitive version:

$messages = array_filter($messages, function($v){
    return !(strtoupper(substr(trim($v), 0, 3)) === "TOR");
});

EDIT:

Even simpler with preg_grep() (Remove the modifier i if you want it case sensitive):

$messages = preg_grep ("/[^\bTOR]/i", array_map("trim", $messages));

Upvotes: 1

nanobash
nanobash

Reputation: 5500

Try:

$array = array(
    'memory_target',
    'vif_2_rx',
    'TOR-SRV65'
);

foreach ($array as $key => $value) {
    if (strtolower(substr($value, 0, 3)) == 'tor') {
        unset($array[$key]);
    }
}

print_r($array); // Output => Array ( [0] => memory_target [1] => vif_2_rx )

Upvotes: 0

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