PHP

php empty array

//To clear array you are able to simply re-instantiate it
$foo = array();

//To clear $foo from the symbol table use
unset($foo);

remove empty array elements php

$colors = array("red","","blue",NULL);

$colorsNoEmptyOrNull = array_filter($colors, function($v){ 
 return !is_null($v) && $v !== ''; 
});
//$colorsNoEmptyOrNull is now ["red","blue"]

declare empty array in php

$emptyArray = []; 
$emptyArray = array();
$emptyArray = (array) null;

php empty array

$emptyArray = []; 
$emptyArray = array(); 
$emptyArray = (array) null;

php create empty array with size

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

How to empty an array in php

unset($foo); // $foo is gone
$foo = array(); // $foo is here again