Convert comma separated string into array
See dedicated page here.
$MyCommaSeperatedString = rtrim(trim("abc,def,ghi,"), ","); //Ensure there is no trailing comma
$MyArray = explode(',', $MyCommaSeperatedString); //Convert to array (No commas will result in the text in the string being in an array of length 1)
print_r($MyArray);
//Will output: Array ( [0] => abc [1] => def [2] => ghi )Convert array to comma separated string
See dedicated page here.
$MyCommaSeperatedString = implode(',', $MyArray);Convert string to byte array
$my_memory_array = array_slice(unpack('C*', "\0".$my_string), 1);