Tokenize a string containing multiple delimiters into an array of associative arrays

From the following string:

I am looking for {{ attribute_a }} with {{ attribute_b }} to make {{ attribute_c }}

I am trying to create the following array structure:

[
   [0] => [
      "type" => "text", 
      "content" => "I am looking for"
   ], 
   [1] => [
      "type" => "dropdown", 
      "name" => "attribute_a"
   ], 
   [2] => [
      "type" => "text",
      "content" => "with"
   ],
   [3] => [
      "type" => "dropdown", 
      "name" => "attribute_b"
   ], 
   [4] => [
      "type" => "text",
      "content" => "to make"
   ],
   [5] => [
      "type" => "dropdown", 
      "name" => "attribute_c"
   ]
]

So the string needs to be cut into parts with "{{ * }}" as a delimiter. But then I need the value inside the delimiter too.

• If the part is outside the delimiter it is a type of text with content.
• If it is inside the delimiter it is a type of dropdown with a property of the name.

With the help of Your Common Sense and CBroe I figured it out:

$result = [];
$pattern = '/(\{\{[^}]*\}\})/';
$lines = preg_split( $pattern, $structure, null, PREG_SPLIT_DELIM_CAPTURE );
   foreach ( $lines as $line ) {
      preg_match( $pattern, $line, $matches );
      if ( $matches ) {
         $result[] = [
            'type' => 'dropdown',
            'name' => trim( str_replace( ['{{', '}}'], "", $line ) )
         ]; 
      } else {
         $result[] = [
            'type' => "text",
            'content' => trim( $line )
         ];
      }
}