A helper to play with Strings, in the future maybe I improve into a library class or better stuff

String_helper.php

<?php
/* Function to take all ocurrences between two characters in a string */
$string = '

@if(topLevel)
{{
  <form method="post">
    @if(mediumLevel)
    {{
      <input>
    }}
  </form>
  <form method="post">
    @if(bottomLevel)
    {{
      <input>
    }}
  </form>
}}';
function string_between($string, $start, $end){
    $total = substr_count($string, $start);
    for ($i = 0; $i < $total; $i++){
        $string = ' ' . $string;
        $ini = strpos($string, $start);
        $ini += strlen($start);
        $len = strpos($string, $end, $ini) - $ini;
        $result[$i] = substr($string, $ini, $len);
        $string = substr($string, $len);
        $ini = strpos($string, $start);
        $string = substr($string, $ini);
    }
    return $result;
}

function string_between_brackets($string, $start, $end){
    $total = substr_count($string, $start);
    for ($i = 0; $i < $total; $i++){
        $string = ' ' . $string;
        $ini = strpos($string, $start);
        $ini += strlen($start);
        if ($i == 0){
            $len = strrpos($string, $end, $ini) - $ini;
        } else {
            $len = strpos($string, $end, $ini) - $ini;
        }
        $result[$i] = substr($string, $ini, $len);
        $string = substr($string, $ini);
    }
    return $result;
}

$parsed = string_between($string, '@if(', ')');
$parsedContent = string_between_brackets($string, '{{', '}}');
$i = 0;
$parsedString = array_combine($parsed, $parsedContent);
var_dump($parsedString);

/*array (size=3)
  'topLevel' => string '
  <form method="post">
    @if(mediumLevel)
    {{
      <input>
    }}
  </form>
  <form method="post">
    @if(bottomLevel)
    {{
      <input>
    }}
  </form>
' (length=165)
  'mediumLevel' => string '
      <input>
    ' (length=19)
  'bottomLevel' => string '
      <input>
    ' (length=19)*/

//EXAMPLE
//$string = '"users","actions","movements" "user1","111","54" "user2","87","123" "user3","92","23"';
//END EXAMPLE
//Converts a specific string pattern into an array where the first occurrence of array in string will be converted to index
/* RESULTS
array (size=3)
  0 => 
    array (size=3)
      'users' => string 'user1' (length=5)
      'actions' => string '111' (length=3)
      'movements' => string '54' (length=2)
  1 => 
    array (size=3)
      'users' => string 'user2' (length=5)
      'actions' => string '87' (length=2)
      'movements' => string '123' (length=3)
  2 => 
    array (size=3)
      'users' => string 'user3' (length=5)
      'actions' => string '92' (length=2)
      'movements' => string '23' (length=2)
*/
function string_to_array($string) {
    $string = str_replace('"', "", $string);
    $result = explode(' ', $string);
    $result2 = array();
    $i = 0;
    //Load the arrays
    foreach ($result as $item) {
      $result2Array[$i] = explode(',', $item);
      $i++;
    }
    $total = count($result2Array) - 1;
    for ($i = 1; $i <= $total; $i++) {
      $j = 0;
      //Bring values to each index
      foreach ($result2Array[0] as $index){
        $resultF[$i-1][$index] = $result2Array[$i][$j];
        $j++;
      }
    }
    return $resultF;
}