php remove element from array

//Delete array items with unset(no re-index) or array_splice(re-index)
$colors = array("red","blue","green");                             
unset($colors[1]);//remove second element, do not re-index array

$colors = array("red","blue","green");
array_splice($colors, 1, 1); //remove second element, re-index array

$items = ['banana', 'apple'];

unset($items[0]);

var_dump($items); // ['apple']

$arr = array('a' => 1, 'b' => 2, 'c' => 3);
unset($arr['b']);

// RESULT: array('a' => 1, 'c' => 3)

$arr = array(1, 2, 3);
array_splice($arr, 1, 1);

// RESULT: array(0 => 1, 1 => 3)

foreach ($items as $key =>$item){
  if(condition){
    unset($item[$key]);
  }
}

$array = [0 => "a", 1 => "b", 2 => "c"];
unset($array[1]);