A php class that intercepts strings in a specified string

Is a php class used to intercept strings between specified strings? Classget_c_str {var $ str; var $ start_str; var $ end_str; var $ start_pos; var $ end_pos; var $ c_str_l; var $ conte a php intercepts a string class between a specified string

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Class get_c_str {var $ str; var $ start_str; var $ end_str; var $ start_pos; var $ end_pos; var $ c_str_l; var $ contents; function get_str ($ str, $ start_str, $ end_str) {$ this-> str = $ str; $ this-> start_str = $ start_str; $ this-> end_str = $ end_str; $ this-> start_pos = strpos ($ this-> str, $ this-> start_str) + strlen ($ this-> start_str ); $ this-> end_pos = strpos ($ this-> str, $ this-> end_str); $ this-> c_str_l = $ this-> end_pos-$ thi S-> start_pos; $ this-> contents = substr ($ this-> str, $ this-> start_pos, $ this-> c_str_l ); return $ this-> contents ;}}?>

 Get_str ('[123456789]', '[', ']');?>