Remove $errcontext argument to error handlers

I'm removing the argument entirely here, but we might want to change
this to passing null or and empty array instead, if the impact of
dropping it entirely turns out to be too large.

This was deprecated as part of https://wiki.php.net/rfc/deprecations_php_7_2
as a doc-only deprecation.

UPGRADING

@@ -34,6 +34,7 @@ PHP 8.0 UPGRADE NOTES
     interpreted as strings.
   . Removed ability to specify an autoloader using an __autoload() function.
     spl_autoload_register() should be used instead.
+  . Removed the $errcontext argument for custom error handlers.
   . Removed create_function(). Anonymous functions may be used instead.
   . Removed each(). foreach or ArrayIterator should be used instead.
   . Removed ability to unbind $this from closures that were created from a

Zend/tests/bug29890.phpt

@@ -2,7 +2,7 @@
 Bug #29890 (crash if error handler fails)
 --FILE--
 <?php
-function customErrorHandler($fErrNo,$fErrStr,$fErrFile,$fErrLine,$fClass) {
+function customErrorHandler($fErrNo,$fErrStr,$fErrFile,$fErrLine) {
 echo "error :".$fErrStr."\n";
 }
 

Zend/tests/bug29896.phpt

@@ -2,7 +2,7 @@
 Bug #29896 (Backtrace argument list out of sync)
 --FILE--
 <?php
-function userErrorHandler($num, $msg, $file, $line, $vars)
+function userErrorHandler($num, $msg, $file, $line)
 {
     debug_print_backtrace();
 }
@@ -22,6 +22,6 @@ function GenerateError2($A1)
 GenerateError2("Test2");
 ?>
 --EXPECTF--
-#0  userErrorHandler(8, Undefined variable: b, %sbug29896.php, 11, Array ([A1] => Test1)) called at [%sbug29896.php:11]
+#0  userErrorHandler(8, Undefined variable: b, %sbug29896.php, 11) called at [%sbug29896.php:11]
 #1  GenerateError1(Test1) called at [%sbug29896.php:16]
 #2  GenerateError2(Test2) called at [%sbug29896.php:19]

Zend/tests/bug35017.phpt

@@ -13,7 +13,7 @@ try {
 } catch(Exception $e) {
   echo "This Exception should be caught\n";
 }
-function errorHandler($errno, $errstr, $errfile, $errline, $vars) {
+function errorHandler($errno, $errstr, $errfile, $errline) {
 	throw new Exception('Some Exception');
 }
 ?>

Zend/tests/bug41209.phpt

@@ -41,6 +41,6 @@ echo "Done\n";
 --EXPECTF--
 Fatal error: Uncaught ErrorException: Undefined variable: id in %s:%d
 Stack trace:
-#0 %s(%d): env::errorHandler(8, '%s', '%s', 34, Array)
+#0 %s(%d): env::errorHandler(8, '%s', '%s', 34)
 #1 {main}
   thrown in %s on line %d

Zend/tests/bug45805.phpt

@@ -38,7 +38,7 @@ $o->bar();
 --EXPECTF--
 Fatal error: Uncaught RuntimeException in %sbug45805.php:%d
 Stack trace:
-#0 %sbug45805.php(%d): PHPUnit_Util_ErrorHandler::handleError(8, 'Only variables ...', '%s', %d, Array)
+#0 %sbug45805.php(%d): PHPUnit_Util_ErrorHandler::handleError(8, 'Only variables ...', '%s', %d)
 #1 [internal function]: B->foo()
 #2 %sbug45805.php(%d): ReflectionMethod->invoke(Object(B))
 #3 %sbug45805.php(%d): B->bar()

Zend/tests/bug48004.phpt

@@ -2,7 +2,7 @@
 Bug #48004 (Error handler prevents creation of default object)
 --FILE--
 <?php
-function error_handler($errno, $errstr, $errfile, $errline, $errcontext) {
+function error_handler($errno, $errstr, $errfile, $errline) {
         return true;
 }
 

Zend/tests/bug51394.phpt

@@ -15,6 +15,6 @@ $a = $empty($b);
 --EXPECTF--
 Fatal error: Uncaught Exception: error! in %sbug51394.php:%d
 Stack trace:
-#0 %sbug51394.php(%d): eh(8, 'Undefined varia%s', '%s', %d, Array)
+#0 %sbug51394.php(%d): eh(8, 'Undefined varia%s', '%s', %d)
 #1 {main}
   thrown in %sbug51394.php on line %d

Zend/tests/bug60909_1.phpt

@@ -13,7 +13,7 @@ require 'notfound.php';
 error(require(notfound.php): failed to open stream: %s)
 Warning: Uncaught Exception: Foo in %sbug60909_1.php:5
 Stack trace:
-#0 %sbug60909_1.php(8): {closure}(2, 'require(notfoun...', '%s', 8, Array)
+#0 %sbug60909_1.php(8): {closure}(2, 'require(notfoun...', '%s', 8)
 #1 %sbug60909_1.php(8): require()
 #2 {main}
   thrown in %sbug60909_1.php on line 5

Zend/tests/bug61767.phpt

@@ -19,7 +19,7 @@ Error handler called (Undefined variable: undefined)
 
 Fatal error: Uncaught ErrorException: Undefined variable: undefined in %sbug61767.php:%d
 Stack trace:
-#0 %sbug61767.php(%d): {closure}(%s, 'Undefined varia...', '%s', %d, Array)
+#0 %sbug61767.php(%d): {closure}(%s, 'Undefined varia...', '%s', %d)
 #1 {main}
   thrown in %sbug61767.php on line %d
 Shutting down

Zend/tests/bug64960.phpt

@@ -33,7 +33,7 @@ Notice: ob_end_flush(): failed to delete and flush buffer. No buffer to delete o
 
 Fatal error: Uncaught Exception in %sbug64960.php:19
 Stack trace:
-#0 [internal function]: {closure}(8, 'ob_end_clean():...', '%s', 9, Array)
+#0 [internal function]: {closure}(8, 'ob_end_clean():...', '%s', 9)
 #1 %sbug64960.php(9): ob_end_clean()
 #2 [internal function]: ExceptionHandler->__invoke(Object(Exception))
 #3 {main}

Zend/tests/bug69388.phpt

@@ -3,7 +3,7 @@ Bug #69388: Use after free on recursive calls to PHP compiler
 --FILE--
 <?php
 
-function handle_error($code, $message, $file, $line, $context) {
+function handle_error($code, $message, $file, $line) {
 	if (!function_exists("bla")) {
 		eval('function bla($s) {echo "$s\n";}');
 	}

Zend/tests/bug69388_2.phpt

@@ -2,7 +2,7 @@
 Bug #69388 - Variation
 --FILE--
 <?php
-function handle_error($code, $message, $file, $line, $context) {
+function handle_error($code, $message, $file, $line) {
     eval('namespace Foo;');
     echo "$message\n";
 }

Zend/tests/bug72057.phpt

@@ -13,7 +13,7 @@ set_error_handler(
 --EXPECTF--
 Fatal error: Uncaught Exception: My custom error in %s:%d
 Stack trace:
-#0 %s(%d): {closure}(8, 'A non well form...', '%s', %d, Array)
+#0 %s(%d): {closure}(8, 'A non well form...', '%s', %d)
 #1 %s(%d): {closure}('7as')
 #2 {main}
   thrown in %s on line %d

Zend/tests/bug72101.phpt

@@ -76,7 +76,7 @@ $foo->bar($a, $b, $c);
 --EXPECTF--
 Fatal error: Uncaught Error: Class 'DoesNotExists' not found in %sbug72101.php:61
 Stack trace:
-#0 %sbug72101.php(8): {closure}(2, 'Parameter 1 to ...', '%s', 8, Array)
+#0 %sbug72101.php(8): {closure}(2, 'Parameter 1 to ...', '%s', 8)
 #1 %sbug72101.php(27): PHPUnit_Framework_MockObject_Stub_ReturnCallback->invoke(Object(PHPUnit_Framework_MockObject_Invocation_Static))
 #2 %sbug72101.php(19): PHPUnit_Framework_MockObject_Matcher->invoked(Object(PHPUnit_Framework_MockObject_Invocation_Static))
 #3 %sbug72101.php(52): PHPUnit_Framework_MockObject_InvocationMocker->invoke(Object(PHPUnit_Framework_MockObject_Invocation_Static))

Zend/tests/bug76025.phpt

@@ -13,6 +13,6 @@ $c = $b[$a];
 --EXPECTF--
 Fatal error: Uncaught Exception: blah in %sbug76025.php:%d
 Stack trace:
-#0 %sbug76025.php(%d): handleError(8, 'Undefined varia...', '%s', %d, Array)
+#0 %sbug76025.php(%d): handleError(8, 'Undefined varia...', '%s', %d)
 #1 {main}
   thrown in %sbug76025.php on line %d

Zend/tests/bug76534.phpt

@@ -12,6 +12,6 @@ $y = &$x["bar"];
 --EXPECTF--
 Fatal error: Uncaught Exception: Illegal string offset 'bar' in %sbug76534.php:%d
 Stack trace:
-#0 %sbug76534.php(%d): {closure}(2, 'Illegal string ...', '%s', %d, Array)
+#0 %sbug76534.php(%d): {closure}(2, 'Illegal string ...', '%s', %d)
 #1 {main}
   thrown in %sbug76534.php on line %d

Zend/tests/nowdoc_015.phpt

@@ -2,7 +2,7 @@
 Test nowdoc and line numbering
 --FILE--
 <?php
-function error_handler($num, $msg, $file, $line, $vars) {
+function error_handler($num, $msg, $file, $line) {
 	echo $line,"\n";
 }
 set_error_handler('error_handler');

Zend/zend.c

@@ -1246,7 +1246,7 @@ static ZEND_COLD void zend_error_va_list(int type, const char *format, va_list a
 	va_list args;
 #endif
 	va_list usr_copy;
-	zval params[5];
+	zval params[4];
 	zval retval;
 	const char *error_filename;
 	uint32_t error_lineno = 0;
@@ -1255,7 +1255,6 @@ static ZEND_COLD void zend_error_va_list(int type, const char *format, va_list a
 	zend_class_entry *saved_class_entry;
 	zend_stack loop_var_stack;
 	zend_stack delayed_oplines_stack;
-	zend_array *symbol_table;
 	zend_class_entry *orig_fake_scope;
 
 	/* Report about uncaught exception in case of fatal errors */
@@ -1385,15 +1384,6 @@ static ZEND_COLD void zend_error_va_list(int type, const char *format, va_list a
 
 			ZVAL_LONG(&params[3], error_lineno);
 
-			symbol_table = zend_rebuild_symbol_table();
-
-			/* during shutdown the symbol table table can be still null */
-			if (!symbol_table) {
-				ZVAL_NULL(&params[4]);
-			} else {
-				ZVAL_ARR(&params[4], zend_array_dup(symbol_table));
-			}
-
 			ZVAL_COPY_VALUE(&orig_user_error_handler, &EG(user_error_handler));
 			ZVAL_UNDEF(&EG(user_error_handler));
 
@@ -1414,7 +1404,7 @@ static ZEND_COLD void zend_error_va_list(int type, const char *format, va_list a
 			orig_fake_scope = EG(fake_scope);
 			EG(fake_scope) = NULL;
 
-			if (call_user_function(CG(function_table), NULL, &orig_user_error_handler, &retval, 5, params) == SUCCESS) {
+			if (call_user_function(CG(function_table), NULL, &orig_user_error_handler, &retval, 4, params) == SUCCESS) {
 				if (Z_TYPE(retval) != IS_UNDEF) {
 					if (Z_TYPE(retval) == IS_FALSE) {
 						zend_error_cb(type, error_filename, error_lineno, format, args);
@@ -1435,7 +1425,6 @@ static ZEND_COLD void zend_error_va_list(int type, const char *format, va_list a
 				CG(in_compilation) = 1;
 			}
 
-			zval_ptr_dtor(&params[4]);
 			zval_ptr_dtor(&params[2]);
 			zval_ptr_dtor(&params[1]);
 

ext/iconv/tests/iconv_mime_decode.phpt

@@ -6,7 +6,7 @@ iconv_mime_decode()
 iconv.internal_charset=iso-8859-1
 --FILE--
 <?php
-function my_error_handler($errno, $errmsg, $filename, $linenum, $vars)
+function my_error_handler($errno, $errmsg, $filename, $linenum)
 {
 	echo "$errno: $errmsg\n";
 }

ext/iconv/tests/iconv_mime_encode.phpt

@@ -6,7 +6,7 @@ iconv_mime_encode()
 iconv.internal_charset=iso-8859-1
 --FILE--
 <?php
-function my_error_handler($errno, $errmsg, $filename, $linenum, $vars)
+function my_error_handler($errno, $errmsg, $filename, $linenum)
 {
 	echo "$errno: $errmsg\n";
 }

ext/iconv/tests/iconv_strpos.phpt

@@ -6,7 +6,7 @@ iconv_strpos()
 iconv.internal_charset=ISO-8859-1
 --FILE--
 <?php
-function my_error_handler($errno, $errmsg, $filename, $linenum, $vars)
+function my_error_handler($errno, $errmsg, $filename, $linenum)
 {
 	echo "$errno: $errmsg\n";
 }

ext/iconv/tests/iconv_strrpos.phpt

@@ -6,7 +6,7 @@ iconv_strrpos()
 iconv.internal_charset=ISO-8859-1
 --FILE--
 <?php
-function my_error_handler($errno, $errmsg, $filename, $linenum, $vars)
+function my_error_handler($errno, $errmsg, $filename, $linenum)
 {
 	echo "$errno: $errmsg\n";
 }

ext/mbstring/tests/common.inc

@@ -4,7 +4,7 @@
  */
 
 // Custom Error Hanlder for testing
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	global $debug;
 
 	$err_type = array (

ext/mbstring/tests/mb_substitute_character_variation1.phpt

@@ -16,7 +16,7 @@ function_exists('mb_substitute_character') or die("skip mb_substitute_character(
 echo "*** Testing mb_substitute_character() : usage variation ***\n";
 
 // Define error handler
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	if (error_reporting() != 0) {
 		// report non-silenced errors
 		echo "Error: $err_no - $err_msg, $filename($linenum)\n";

ext/posix/tests/posix_ttyname_variation6.phpt

@@ -18,7 +18,7 @@ echo "*** Test substituting argument 1 with object values ***\n";
 
 
 
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
         if (error_reporting() != 0) {
                 // report non-silenced errors
                 echo "Error: $err_no - $err_msg, $filename($linenum)\n";

ext/spl/tests/class_implements_variation1.phpt

@@ -12,7 +12,7 @@ echo "*** Testing class_implements() : variation ***\n";
 
 
 // Define error handler
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	if (error_reporting() != 0) {
 		// report non-silenced errors
 		echo "Error: $err_no - $err_msg, $filename($linenum)\n";

ext/spl/tests/class_uses_variation1.phpt

@@ -12,7 +12,7 @@ echo "*** Testing class_uses() : variation ***\n";
 
 
 // Define error handler
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	if (error_reporting() != 0) {
 		// report non-silenced errors
 		echo "Error: $err_no - $err_msg, $filename($linenum)\n";

ext/standard/tests/array/array_diff_uassoc_variation14.phpt

@@ -19,7 +19,7 @@ class classWithoutToString
 }
 
 // Define error handler
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	if (error_reporting() != 0) {
 		// report non-silenced errors
 		echo "Error: $err_no - $err_msg, $filename($linenum)\n";

ext/standard/tests/array/array_diff_ukey_variation11.phpt

@@ -15,7 +15,7 @@ $array2 = array('blue'  => 1, 'red'  => 2, 'green'  => 3, 'purple' => 4);
 $array3 = array(1, 2, 3, 4, 5);
 
 // Define error handler
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
         if (error_reporting() != 0) {
                 // report non-silenced errors
                 echo "Error: $err_no - $err_msg, $filename($linenum)\n";

ext/standard/tests/array/array_intersect_uassoc_variation11.phpt

@@ -14,7 +14,7 @@ $array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
 $array2 = array("a" => "green", "yellow", "red");
 $array3 = array("a"=>"green", "brown");
 // Define error handler
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
         if (error_reporting() != 0) {
                 // report non-silenced errors
                 echo "Error: $err_no - $err_msg, $filename($linenum)\n";

ext/standard/tests/array/array_intersect_ukey_variation10.phpt

@@ -15,7 +15,7 @@ $array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan'   => 8);
 $array3 = array("a"=>"green", "cyan");
 
 // Define error handler
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
         if (error_reporting() != 0) {
                 // report non-silenced errors
                 echo "Error: $err_no - $err_msg, $filename($linenum)\n";

ext/standard/tests/array/array_multisort_variation1.phpt

@@ -11,7 +11,7 @@ Test array_multisort() function : usage variation
 echo "*** Testing array_multisort() : usage variation ***\n";
 
 // Define error handler
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	if (error_reporting() != 0) {
 		// report non-silenced errors
 		echo "Error: $err_no - $err_msg, $filename($linenum)\n";

ext/standard/tests/array/array_multisort_variation2.phpt

@@ -11,7 +11,7 @@ Test array_multisort() function : usage variation
 echo "*** Testing array_multisort() : usage variation ***\n";
 
 // Define error handler
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	if (error_reporting() != 0) {
 		// report non-silenced errors
 		echo "Error: $err_no - $err_msg, $filename($linenum)\n";

ext/standard/tests/array/array_multisort_variation3.phpt

@@ -11,7 +11,7 @@ Test array_multisort() function : usage variation
 echo "*** Testing array_multisort() : usage variation ***\n";
 
 // Define error handler
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	if (error_reporting() != 0) {
 		// report non-silenced errors
 		echo "Error: $err_no - $err_msg, $filename($linenum)\n";

ext/standard/tests/array/array_multisort_variation8.phpt

@@ -11,7 +11,7 @@ Test array_multisort() function : usage variation - test sort order of all types
 echo "*** Testing array_multisort() : usage variation  - test sort order of all types***\n";
 
 // Define error handler
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	// We're testing sort order not errors so ignore.
 }
 set_error_handler('test_error_handler');

ext/standard/tests/class_object/get_class_methods_variation_001.phpt

@@ -9,7 +9,7 @@ Test get_class_methods() function : usage variations  - unexpected types
  */
 
 
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	echo "Error: $err_no - $err_msg, $filename($linenum)\n";
 }
 set_error_handler('test_error_handler');

ext/standard/tests/class_object/get_parent_class_variation_002.phpt

@@ -12,7 +12,7 @@ spl_autoload_register(function ($className) {
 	echo "In autoload($className)\n";
 });
 
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	echo "Error: $err_no - $err_msg, $filename($linenum)\n";
 }
 set_error_handler('test_error_handler');

ext/standard/tests/class_object/is_subclass_of_variation_001.phpt

@@ -12,7 +12,7 @@ spl_autoload_register(function ($className) {
 	echo "In autoload($className)\n";
 });
 
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	echo "Error: $err_no - $err_msg, $filename($linenum)\n";
 }
 set_error_handler('test_error_handler');

ext/standard/tests/class_object/is_subclass_of_variation_004.phpt

@@ -12,7 +12,7 @@ spl_autoload_register(function ($className) {
 	echo "In autoload($className)\n";
 });
 
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	echo "Error: $err_no - $err_msg, $filename($linenum)\n";
 }
 set_error_handler('test_error_handler');

ext/standard/tests/class_object/method_exists_variation_001.phpt

@@ -12,7 +12,7 @@ spl_autoload_register(function ($className) {
 	echo "In autoload($className)\n";
 });
 
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	echo "Error: $err_no - $err_msg, $filename($linenum)\n";
 }
 set_error_handler('test_error_handler');

ext/standard/tests/file/file_put_contents_variation2.phpt

@@ -13,7 +13,7 @@ Dave Kelsey <d_kelsey@uk.ibm.com>
 echo "*** Testing file_put_contents() : usage variation ***\n";
 
 // Define error handler
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	if (error_reporting() != 0) {
 		// report non-silenced errors
 		echo "Error: $err_no - $err_msg, $filename($linenum)\n";

ext/standard/tests/file/file_put_contents_variation3.phpt

@@ -13,7 +13,7 @@ Dave Kelsey <d_kelsey@uk.ibm.com>
 echo "*** Testing file_put_contents() : usage variation ***\n";
 
 // Define error handler
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	if (error_reporting() != 0) {
 		// report non-silenced errors
 		echo "Error: $err_no - $err_msg, $filename($linenum)\n";

ext/standard/tests/general_functions/intval_variation1.phpt

@@ -11,7 +11,7 @@ Test intval() function : usage variation
 echo "*** Testing intval() : usage variation ***\n";
 
 // Define error handler
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	if (error_reporting() != 0) {
 		// report non-silenced errors
 		echo "Error: $err_no - $err_msg, $filename($linenum)\n";

ext/standard/tests/image/getimagesize_variation2.phpt

@@ -8,7 +8,7 @@ Test getimagesize() function : usage variations  - unexpected type for arg 2
  * Alias to functions:
  */
 
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
 	echo "Error: $err_no - $err_msg, $filename($linenum)\n";
 }
 set_error_handler('test_error_handler');

tests/classes/tostring_004.phpt

@@ -2,7 +2,7 @@
 Object to string conversion: error cases and behaviour variations.
 --FILE--
 <?php
-function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
+function test_error_handler($err_no, $err_msg, $filename, $linenum) {
         echo "Error: $err_no - $err_msg\n";
 }
 set_error_handler('test_error_handler');

tests/lang/bug25547.phpt

@@ -3,7 +3,7 @@ Bug #25547 (error_handler and array index with function call)
 --FILE--
 <?php
 
-function handler($errno, $errstr, $errfile, $errline, $context)
+function handler($errno, $errstr, $errfile, $errline)
 {
 	echo __FUNCTION__ . "($errstr)\n";
 }