View Issue Details

IDProjectCategoryView StatusLast Update
0001883XdebugUncategorizedpublic2020-11-14 16:15
ReporterSarunas Assigned Toderick  
Status resolvedResolutionno change required 
Product Version3.0.0beta1 
Target Version3.0.0RC1Fixed in Version3.0.0RC1 
Summary0001883: Function xdebug_is_enabled has been removed
DescriptionXDebug 2.x used to have an (undocumented?) function `xdebug_is_enabled`, which is used by certain projects to detect XDebug. This function seems to be gone from the 3.0.0beta1 version.

For example, Symfony DI uses this function ( ) to work around a different problem ( ). After upgrading XDebug to v3, I started hitting this Symfony problem, and eventually found that this missing function is the reason.
Steps To Reproduce; the PHP version I'm using
> php73 -v
PHP 7.3.14 (cli) (built: Jan 21 2020 13:15:39) ( NTS MSVC15 (Visual C++ 2017) x64 )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.14, Copyright (c) 1998-2018 Zend Technologies
    with Zend OPcache v7.3.14, Copyright (c) 1999-2018, by Zend Technologies

; xdebug 2.x
> php73 -n -d'zend_extension="C:\Program Files\PHP\v7.3\ext\php_xdebug_2.dll"' -r'var_dump(phpversion("xdebug"), function_exists("xdebug_is_enabled"));'
Command line code:1:
string(5) "2.9.1"
Command line code:1:

; xdebug 3.x
> php73 -n -d'zend_extension="C:\Program Files\PHP\v7.3\ext\php_xdebug_3.dll"' -r'var_dump(phpversion("xdebug"), function_exists("xdebug_is_enabled"));'
Command line code:1:
string(10) "3.0.0beta1"
Command line code:1:
TagsNo tags attached.
Operating SystemWindows 10
PHP Version7.3.10-7.3.14



2020-11-11 12:43

administrator   ~0005516

It was undocumented and hence it should not have been relied on. I have added its removal to the upgrade guide (

If you want to talk about why that workaround was required and figure out a different one, please reach out through email.

Issue History

Date Modified Username Field Change
2020-11-11 10:33 Sarunas New Issue
2020-11-11 12:43 derick Assigned To => derick
2020-11-11 12:43 derick Status new => resolved
2020-11-11 12:43 derick Resolution open => no change required
2020-11-11 12:43 derick Fixed in Version => 3.0.0RC1
2020-11-11 12:43 derick Note Added: 0005516
2020-11-11 12:43 derick Summary Function xdebug_is_enabled is not defined => Function xdebug_is_enabled has been removed
2020-11-14 16:15 derick Target Version => 3.0.0RC1