php empty array

1if (empty($array)) {
2     // list is empty.
3}

1//To clear array you are able to simply re-instantiate it
2$foo = array();
3
4//To clear $foo from the symbol table use
5unset($foo);

1$arr = array();
2
3if(!empty($arr)){
4  echo "not empty";
5}
6else 
7{
8  echo "empty";
9}
10

1$colors = array("red","","blue",NULL);
2
3$colorsNoEmptyOrNull = array_filter($colors, function($v){ 
4 return !is_null($v) && $v !== ''; 
5});
6//$colorsNoEmptyOrNull is now ["red","blue"]

1$emptyArray = []; 
2$emptyArray = array();
3$emptyArray = (array) null;

1$my_array = array_fill(0, $size_of_the_array, $some_data);
2