chore(agent): remove obsolete code

agent/config.m4

@@ -223,13 +223,13 @@ if test "$PHP_NEWRELIC" = "yes"; then
   php_user_instrument_wraprec_hashmap.c \
   php_user_instrument_hashmap.c php_vm.c php_wrapper.c"
   FRAMEWORKS="fw_cakephp.c fw_codeigniter.c fw_drupal8.c \
-  fw_drupal.c fw_drupal_common.c fw_joomla.c fw_kohana.c \
+  fw_drupal.c fw_drupal_common.c fw_joomla.c \
   fw_laminas3.c fw_laravel.c fw_laravel_queue.c fw_lumen.c \
   fw_magento1.c fw_magento2.c fw_magento_common.c fw_mediawiki.c \
-  fw_silex.c fw_slim.c fw_support.c fw_symfony4.c fw_symfony2.c \
-  fw_symfony.c fw_symfony_common.c fw_wordpress.c fw_yii.c \
-  fw_zend2.c fw_zend.c"
-  LIBRARIES="lib_aws_sdk_php.c lib_monolog.c lib_doctrine2.c lib_guzzle3.c \
+  fw_slim.c fw_support.c fw_symfony4.c \
+  fw_symfony_common.c fw_wordpress.c fw_yii.c \
+  fw_zend3.c"
+  LIBRARIES="lib_aws_sdk_php.c lib_monolog.c lib_doctrine2.c \
   lib_guzzle4.c lib_guzzle6.c lib_guzzle_common.c \
   lib_mongodb.c lib_phpunit.c lib_predis.c lib_zend_http.c \
   lib_composer.c lib_php_amqplib.c"

agent/fw_codeigniter.c

@@ -15,7 +15,6 @@
 #include "util_strings.h"
 
 zend_op_array* nr_codeigniter_get_topmost_user_op_array(TSRMLS_D) {
-#ifdef PHP7
   zend_execute_data* ed = NULL;
 
   for (ed = EG(current_execute_data); ed; ed = ed->prev_execute_data) {
@@ -27,9 +26,6 @@ zend_op_array* nr_codeigniter_get_topmost_user_op_array(TSRMLS_D) {
   }
 
   return NULL;
-#else
-  return EG(current_execute_data)->op_array;
-#endif /* PHP7 */
 }
 
 /*

agent/fw_drupal8.c

@@ -197,11 +197,7 @@ static int nr_drupal8_is_function_in_call_stack(const char* function,
   trace = nr_php_zval_alloc();
 
   /* Grab the actual backtrace. */
-#if ZEND_MODULE_API_NO >= ZEND_5_4_X_API_NO
   zend_fetch_debug_backtrace(trace, 0, 1, 0 TSRMLS_CC);
-#else /* PHP < 5.4 */
-  zend_fetch_debug_backtrace(trace, 0, 1 TSRMLS_CC);
-#endif
 
   if (!nr_php_is_zval_valid_array(trace)) {
     nrl_error(NRL_TXN, "%s: trace should never not be an array", __func__);

agent/fw_hooks.h

@@ -20,28 +20,22 @@ extern void nr_drupal_enable(TSRMLS_D);
 
 extern void nr_drupal8_enable(TSRMLS_D);
 extern void nr_joomla_enable(TSRMLS_D);
-extern void nr_kohana_enable(TSRMLS_D);
 extern void nr_laminas3_enable(TSRMLS_D);
 extern void nr_laravel_enable(TSRMLS_D);
 extern void nr_lumen_enable(TSRMLS_D);
 extern void nr_magento1_enable(TSRMLS_D);
 extern void nr_magento2_enable(TSRMLS_D);
 extern void nr_mediawiki_enable(TSRMLS_D);
-extern void nr_symfony1_enable(TSRMLS_D);
-extern void nr_symfony2_enable(TSRMLS_D);
 extern void nr_symfony4_enable(TSRMLS_D);
-extern void nr_silex_enable(TSRMLS_D);
 extern void nr_slim_enable(TSRMLS_D);
 extern void nr_wordpress_enable(TSRMLS_D);
 extern void nr_yii1_enable(TSRMLS_D);
 extern void nr_yii2_enable(TSRMLS_D);
-extern void nr_zend_enable(TSRMLS_D);
-extern void nr_fw_zend2_enable(TSRMLS_D);
+extern void nr_fw_zend3_enable(TSRMLS_D);
 
 /* Libraries. */
 extern void nr_aws_sdk_php_enable();
 extern void nr_doctrine2_enable(TSRMLS_D);
-extern void nr_guzzle3_enable(TSRMLS_D);
 extern void nr_guzzle4_enable(TSRMLS_D);
 extern void nr_guzzle6_enable(TSRMLS_D);
 extern void nr_laminas_http_enable(TSRMLS_D);

agent/fw_laminas3.c

@@ -18,7 +18,7 @@
 /*
  * Laminas is a rebranding of Zend, but the logic remains the same,
  * it is simply a name change and corresponds directly to Zend 3.x.
- * Compare to `fw_zend2.c`
+ * Compare to `fw_zend3.c`
  *
  * How Laminas nee Zend Routing Works
  * =====================

agent/fw_laravel.c

@@ -490,13 +490,8 @@ static void nr_laravel_name_transaction(zval* router, zval* request TSRMLS_DC) {
  *
  */
 NR_PHP_WRAPPER(nr_laravel5_exception_render) {
-#if ZEND_MODULE_API_NO >= ZEND_5_4_X_API_NO
   const char* class_name = NULL;
   const char* ignored = NULL;
-#else
-  char* class_name = NULL;
-  char* ignored = NULL;
-#endif /* PHP >= 5.4 */
 
   char* name = NULL;
 

agent/fw_laravel_queue.c

@@ -620,7 +620,6 @@ NR_PHP_WRAPPER(nr_laravel_queue_worker_process) {
   if (EG(exception)) {
     zval* exception_zval = NULL;
 
-#if ZEND_MODULE_API_NO >= ZEND_7_0_X_API_NO /* PHP 7.0+ */
     /*
      * On PHP 7, EG(exception) is stored as a zend_object, and is only wrapped
      * in a zval when it actually needs to be. Unfortunately, our error handling
@@ -640,12 +639,6 @@ NR_PHP_WRAPPER(nr_laravel_queue_worker_process) {
 
     ZVAL_OBJ(&exception, EG(exception));
     exception_zval = &exception;
-#else
-    /*
-     * On PHP 5, the exception is just a regular old zval.
-     */
-    exception_zval = EG(exception);
-#endif /* PHP7+ */
 
     nr_php_error_record_exception(
         NRPRG(txn), exception_zval, NR_PHP_ERROR_PRIORITY_UNCAUGHT_EXCEPTION,
@@ -835,13 +828,8 @@ NR_PHP_WRAPPER(nr_laravel_queue_queue_createpayload) {
   /*
    * Finally, we change the string in the return value to our new JSON.
    */
-#if ZEND_MODULE_API_NO >= ZEND_7_0_X_API_NO /* PHP 7.0+ */
   zend_string_free(Z_STR_P(*retval_ptr));
   Z_STR_P(*retval_ptr) = zend_string_copy(Z_STR_P(json));
-#else
-  efree(Z_STRVAL_PP(retval_ptr));
-  nr_php_zval_str_len(*retval_ptr, Z_STRVAL_P(json), Z_STRLEN_P(json));
-#endif /* PHP7+ */
 
 end:
   nr_php_zval_free(&payload);

agent/fw_lumen.c

@@ -166,13 +166,8 @@ NR_PHP_WRAPPER(nr_lumen_exception) {
 
   NR_PHP_WRAPPER_REQUIRE_FRAMEWORK(NR_FW_LUMEN);
 
-#if ZEND_MODULE_API_NO >= ZEND_5_4_X_API_NO
   const char* class_name = NULL;
   const char* ignored = NULL;
-#else
-  char* class_name = NULL;
-  char* ignored = NULL;
-#endif /* PHP >= 5.4 */
 
   char* name = NULL;