Fixed bug #35634 (Erroneous "Class declarations may not be nested" error raised). (Carl P. Corliss)

Zend/tests/bug35634.phpt

@@ -0,0 +1,36 @@
+--TEST--
+Bug #35634 (Erroneous "Class declarations may not be nested" error raised)
+--INI--
+error_reporting=0
+--FILE--
+<?php
+if (defined("pass3")) {
+
+  class ErrorClass {
+  }
+
+} else if (defined("pass2")) {
+
+  class TestClass {
+    function __construct() {
+    }
+    function TestClass() {
+      $this->__construct();
+    }
+  }
+
+} else {
+
+  function errorHandler($errorNumber, $errorMessage, $fileName, $lineNumber) {
+    define("pass3", 1);
+    include(__FILE__);
+    die("Error: $errorMessage ($fileName:$lineNumber)\n");
+  }
+
+  set_error_handler('errorHandler');
+  define("pass2", 1);
+  include(__FILE__);
+}
+?>
+--EXPECTF--
+Error: Redefining already defined constructor for class TestClass (%sbug35634.php:12)

Zend/zend.c

@@ -1391,6 +1391,8 @@ ZEND_API void zend_error(int type, const char *format, ...)
 	char *error_filename;
 	uint error_lineno;
 	zval *orig_user_error_handler;
+	zend_bool in_compilation;
+	zend_class_entry *saved_class_entry;
 	TSRMLS_FETCH();
 
 	/* Obtain relevant filename and lineno */
@@ -1504,6 +1506,17 @@ ZEND_API void zend_error(int type, const char *format, ...)
 			orig_user_error_handler = EG(user_error_handler);
 			EG(user_error_handler) = NULL;
 
+			/* User error handler may include() additinal PHP files.
+			 * If an error was generated during comilation PHP will compile
+			 * such scripts recursivly, but some CG() variables may be 
+			 * inconsistent. */ 
+
+			in_compilation = zend_is_compiling(TSRMLS_C);
+			if (in_compilation) {
+				saved_class_entry = CG(active_class_entry);
+				CG(active_class_entry) = NULL;
+			}
+
 			if (call_user_function_ex(CG(function_table), NULL, orig_user_error_handler, &retval, 5, params, 1, NULL TSRMLS_CC)==SUCCESS) {
 				if (retval) {
 					if (Z_TYPE_P(retval) == IS_BOOL && Z_LVAL_P(retval) == 0) {
@@ -1516,6 +1529,10 @@ ZEND_API void zend_error(int type, const char *format, ...)
 				zend_error_cb(type, error_filename, error_lineno, format, args);
 			}
 
+			if (in_compilation) {
+				CG(active_class_entry) = saved_class_entry;
+			}
+
 			if (!EG(user_error_handler)) {
 				EG(user_error_handler) = orig_user_error_handler;
 			}