how to empty array in php code example

Example 1: clear array php

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

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

Example 2: 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"]