Revert "Fix bug #61537 (json_encode() incorrectly truncates/discards information) and"

This reverts commit cb2a1c71c9.
The fix is not correct, not fixed after discussion on github.
Please fix the issues and reapply the patch

NEWS

@@ -74,10 +74,6 @@ PHP                                                                        NEWS
   . Fixed bug #61487 (Incorrent bounds checking in grapheme_strpos).
     (Stas)
 
-- JSON
-  . Fixed bug #61537 (json_encode() incorrectly truncates/discards
-    information). (Adam)
-
 - Libxml:
   . Fixed bug #61617 (Libxml tests failed(ht is already destroyed)).
     (Laruence)

ext/json/json.c

@@ -96,7 +96,6 @@ static PHP_MINIT_FUNCTION(json)
 	REGISTER_LONG_CONSTANT("JSON_UNESCAPED_SLASHES", PHP_JSON_UNESCAPED_SLASHES, CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("JSON_PRETTY_PRINT", PHP_JSON_PRETTY_PRINT, CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("JSON_UNESCAPED_UNICODE", PHP_JSON_UNESCAPED_UNICODE, CONST_CS | CONST_PERSISTENT);
-	REGISTER_LONG_CONSTANT("JSON_PARTIAL_OUTPUT_ON_ERROR", PHP_JSON_PARTIAL_OUTPUT_ON_ERROR, CONST_CS | CONST_PERSISTENT);
 
 	REGISTER_LONG_CONSTANT("JSON_ERROR_NONE", PHP_JSON_ERROR_NONE, CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("JSON_ERROR_DEPTH", PHP_JSON_ERROR_DEPTH, CONST_CS | CONST_PERSISTENT);
@@ -390,7 +389,9 @@ static void json_escape_string(smart_str *buf, char *s, int len, int options TSR
 		}
 		if (ulen < 0) {
 			JSON_G(error_code) = PHP_JSON_ERROR_UTF8;
-			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid UTF-8 sequence in argument");
+			if (!PG(display_errors)) {
+				php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid UTF-8 sequence in argument");
+			}
 			smart_str_appendl(buf, "null", 4);
 		} else {
 			smart_str_appendl(buf, "\"\"", 2);
@@ -688,11 +689,7 @@ static PHP_FUNCTION(json_encode)
 
 	php_json_encode(&buf, parameter, options TSRMLS_CC);
 
-	if (JSON_G(error_code) != PHP_JSON_ERROR_NONE && options ^ PHP_JSON_PARTIAL_OUTPUT_ON_ERROR) {
-		ZVAL_FALSE(return_value);
-	} else {
-		ZVAL_STRINGL(return_value, buf.c, buf.len, 1);
-	}
+	ZVAL_STRINGL(return_value, buf.c, buf.len, 1);
 
 	smart_str_free(&buf);
 }

ext/json/php_json.h

@@ -63,7 +63,6 @@ extern zend_class_entry *php_json_serializable_ce;
 #define PHP_JSON_UNESCAPED_SLASHES	(1<<6)
 #define PHP_JSON_PRETTY_PRINT	(1<<7)
 #define PHP_JSON_UNESCAPED_UNICODE	(1<<8)
-#define PHP_JSON_PARTIAL_OUTPUT_ON_ERROR	(1<<9)
 
 /* Internal flags */
 #define PHP_JSON_OUTPUT_ARRAY	0

ext/json/tests/bug43941.phpt

@@ -0,0 +1,21 @@
+--TEST--
+Bug #43941 (json_encode() invalid UTF-8)
+--SKIPIF--
+<?php if (!extension_loaded("json")) print "skip"; ?>
+--FILE--
+<?php
+
+var_dump(json_encode("abc"));
+var_dump(json_encode("ab\xE0"));
+var_dump(json_encode("ab\xE0c"));
+var_dump(json_encode(array("ab\xE0", "ab\xE0c", "abc")));
+
+echo "Done\n";
+?>
+--EXPECTF--
+string(5) ""abc""
+string(4) "null"
+string(4) "null"
+string(17) "[null,null,"abc"]"
+Done
+

ext/json/tests/bug54058.phpt

@@ -29,14 +29,7 @@ json_encode($c);
 var_dump(json_last_error());
 ?>
 --EXPECTF--
-Warning: json_encode(): Invalid UTF-8 sequence in argument in %s on line %d
 int(5)
-
-Warning: json_encode(): Invalid UTF-8 sequence in argument in %s on line %d
 int(5)
-
-Warning: json_encode(): Invalid UTF-8 sequence in argument in %s on line %d
 int(5)
-
-Warning: json_encode(): Invalid UTF-8 sequence in argument in %s on line %d
 int(5)

ext/json/tests/bug61537.phpt

@@ -1,30 +0,0 @@
---TEST--
-Bug #61537 (json_encode() incorrectly truncates/discards information)
---SKIPIF--
-<?php if (!extension_loaded("json")) print "skip"; ?>
---FILE--
-<?php
-$invalid_utf8 = "\x9f";
-var_dump(json_encode($invalid_utf8), json_last_error());
-var_dump(json_encode($invalid_utf8, JSON_PARTIAL_OUTPUT_ON_ERROR), json_last_error());
-
-$invalid_utf8 = "an invalid sequen\xce in the middle of a string";
-var_dump(json_encode($invalid_utf8), json_last_error());
-var_dump(json_encode($invalid_utf8, JSON_PARTIAL_OUTPUT_ON_ERROR), json_last_error());
-?>
---EXPECTF--
-Warning: json_encode(): Invalid UTF-8 sequence in argument in %s on line %d
-bool(false)
-int(5)
-
-Warning: json_encode(): Invalid UTF-8 sequence in argument in %s on line %d
-string(4) "null"
-int(5)
-
-Warning: json_encode(): Invalid UTF-8 sequence in argument in %s on line %d
-bool(false)
-int(5)
-
-Warning: json_encode(): Invalid UTF-8 sequence in argument in %s on line %d
-string(4) "null"
-int(5)