Разбить текст в массив по заданным знакам

$massiv[0] == "tex tex text text";
$massiv[1] == "{";
$massiv[2] == "text";
$massiv[3] == "}";
$massiv[4] == "text tex tex text";

$str = 'tex tex text text {text} text tex tex text';
 
$patt = '~([^{]+)(\{)([^}]+)(\})([^{]+)~';
 
if (preg_match($patt, $str, $arr)) {
    $arr = array_slice($arr, 1);
}
 
var_dump($arr);

array(5) {
  [0]=>
  string(18) "tex tex text text "
  [1]=>
  string(1) "{"
  [2]=>
  string(4) "text"
  [3]=>
  string(1) "}"
  [4]=>
  string(19) " text tex tex text "
}

$str = 'tex tex text text {text} text tex tex text {tex} text text text {te} te te te text';

$str = 'tex tex text text {text} text tex tex text {tex} text text text {te} te te te text';
 
$patt = '~[^{}]+ | (?: { | } )~x';
preg_match_all($patt, $str, $arr);
 
var_dump($arr[0]);
/*
array(13) {
  [0]=>
  string(18) "tex tex text text "
  [1]=>
  string(1) "{"
  [2]=>
  string(4) "text"
  [3]=>
  string(1) "}"
  [4]=>
  string(19) " text tex tex text "
  [5]=>
  string(1) "{"
  [6]=>
  string(3) "tex"
  [7]=>
  string(1) "}"
  [8]=>
  string(16) " text text text "
  [9]=>
  string(1) "{"
  [10]=>
  string(2) "te"
  [11]=>
  string(1) "}"
  [12]=>
  string(14) " te te te text"
}
*/

$str = '[0] Do you like that dress? {A} The dress in the shop window. {B} The dress I am wearing.';
 
$patt = '~[^{}[\]]+ | (?: { | } | \[ | \] )~x';
preg_match_all($patt, $str, $arr);
 
var_dump($arr[0]);

$str = '[0] Do you like that dress? {A} The dress in the shop window. {B} The dress I am wearing.';
 
$patt = '~[^{}[\]]+ | (?: [{}[\]] )~x';
preg_match_all($patt, $str, $arr);
 
var_dump($arr[0]);