For packages that have the PHP version in the package name, such as inphp81-php-xdebug3, you can substitute the PHPversion with the one that matches the PHP version that you are running.
In some cases pecl will change the php.ini file toadd a configuration line to load Xdebug. You can check whether it did byrunning php -v. If Xdebug shows up with a version number, thanyou're all set and you can configure Xdebug's other functions, such asStep Debugging, or Profiling.
Xdebug
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On Apple M1 hardware, programs can either be compiled for the native M1/ARM64architecture, or for the emulated x86_64 architecure. Sometimes there is amismatch with the default and PECL will fail, or Xdebug won't load with amessage such as:
You compile Xdebug separately from the rest of PHP. You need access to thescripts phpize and php-config. If your systemdoes not have phpize and php-config, you willneed to install the PHP development headers.
It is important that the source version matches the installed version as thereare slight, but important, differences between PHP versions. Once you haveaccess to phpize and php-config, take thefollowing steps:
If phpize is not in your path, please make surethat it is, by expanding the PATH environment variable. Make sureyou use the phpize that belongs to the PHP version that you want to use Xdebugwith. See this FAQ entry if you're having someissues with finding which phpize to use.
With Xdebug loaded, you can now enable individual features, such asStep Debugging, or Profiling. Information on what these featers are,how they work, and how to configure them is available on each feature'sdocumentation page:
This video teaches you how to troubleshoot your Xdebug setup. It explains how to find out how Xdebug is configured, which settings have been made, and what it is attempting to do regarding its different features.
All warnings and errors are described on the Description of errors page, withdetailed instructions on how to resolve the problem, if possible. All errors are always logged throughPHP's internal logging mechanism (configured with error_login php.ini). All warnings and errors also show up in thediagnostics log that you can view by calling xdebug_info().
You can also set Xdebug's mode by setting the XDEBUG_MODEenvironment variable on the command-line; this will take precedence over thexdebug.mode setting, but will not change the value of the xdebug.modesetting.
My netbeans does not work the breakpoints using xdebug, my configuration looks correct, so I configured the first time I ran up to stop debugging the first time since then has never worked, someone had this problem? The version of my netbeans is 6.8 and the version of php is 2.5.2.
BTW - when I installed multiple PHP versions, this ext-xdebug.ini file was only created for the first PHP version I installed. I simply copied this file to the other PHP version locations, and changed the "php56-xdebug" part of the path in line 2 to reflect the proper php version.
This protocol is supported by nearly every PHP IDE (including Visual Studio Code and PhpStorm), and also by text-based editors. There isalso a simple Command Line Debug Client available as part of the Xdebug project,but it is strongly recommended that you use an IDE for debugging. (An overview of third party clients is available further downthis page.)
In your php.ini, 99-xdebug.ini, or otherdistribution specific PHP ini file, change (or set) the xdebug.mode setting todebug. Please refer to Configure PHP in the documentation tofind out which PHP ini file to modify.
If PHP/Xdebug run on a different machine, virtual host, or in a Dockercontainer, you need to tell Xdebug where to make the debugging connectionto, as it is Xdebug that initiates the communication to the IDE, and notthe other way around.
If PHP/Xdebug run on a different machine in the same sub-net, and you runyour browser on the same host as your IDE, then you set thexdebug.discover_client_host setting to 1. Xdebug will then use theHTTP headers to find out the IP address of the host that initiated thedebugging request, and use that IP address to connect to. This is a commonway of set-up if you are sharing a development server among you and your teammates.
In more complex set-ups you need to configure the host and port that Xdebugconnects to yourself. With xdebug.client_host you can select the IP or hostnameof the machine that runs your IDE, and with xdebug.client_port the TCP port.Make sure that the host running PHP/Xdebug can connect to your IDE with theconfigured IP address and port, and that there is no firewall or other softwareblocking an incoming connection.
In the default configuration, the debugger activates if a "trigger" ispresent, although it's possible to instruct the debugger to always initiate adebugging session by setting xdebug.start_with_request to yes.
Each extension adds an icon to your browser where you can select whichfunctionality you want to trigger. Xdebug will continue to start debugging forevery request as long as the debug toggle has been enabled.
Alternatively, you can signal Xdebug to initiate debugging for asingle request by addingXDEBUG_SESSION=session_name as additional GET (orPOST) parameter. You can pick any value forsession_name, unless xdebug.trigger_value is set.
Xdebug will initiate a debug session in the presence of theXDEBUG_SESSION HTTP cookie. You can pick any value for the cookie,unless xdebug.trigger_value is set, in which case the value needs to match thevalue/one of the values from xdebug.trigger_value.
Calling xdebug_break() will trigger a debugging connection as long asxdebug.start_with_request is set to trigger and no debugger sessionis active yet. If a debugger session is already active, it will simply act asif a breakpoint was set through your IDE.
You can troubleshoot Xdebug's attempts at initiating debugging connectionsby configuring a log file through xdebug.log. When the connection issuccessfully established the log will also contain the communication betweenXdebug and IDE.
The log file will contain to which IP addresses it is attempting to connectand at which ports, which should be a great help debugging why it sometimesdoesn't work. A "remote log file" is also required when reporting a bug inXdebug's step debugger.
Xdebug's implementation of theDBGp protocol's context_namescommand does not depend on the stack level. The returned value is always thesame during each debugger session, and hence, can be safely cached.
This command returns which lines in an active stack frame can have a workingbreakpoint. These are the lines which have an EXT_STMTopcode on them. This commands accepts a -d option, whichindicates the stack depth, with 0 being the top leve stack frame.
If xdebug.client_discovery_header is configured to be a non-empty string, then thevalue is used as key in the $_SERVER superglobal array to determinewhich header to use to find the IP address or hostname to use for 'connectingback to'. This setting is only used in combination withxdebug.discover_client_host and is otherwise ignored.
It is possible to configure multiple fallbacks by using a comma separatedlist of values. For example if you want to use HTTP_FORWARD_HOSTfirst, and then also want to check REMOTE_ADDR, then you setxdebug.client_discovery_header toHTTP_FORWARD_HOST,REMOTE_ADDR.
If you have logging enabled, and set the xdebug.log_level setting to10, then Xdebug will list every header, the header value, and theused header (if any) when attempting to find the IP address to connect backto.Xdebug 3.2 and later no longer fall back to the $_SERVER['HTTP_X_FORWARDED_FOR'] and$_SERVER['REMOTE_ADDR'] header values by default. If you wantthese headers to be used as well, you specifically need to add these to thelist of headers, by setting xdebug.client_discovery_header toYOUR_OWN_HEADER,HTTP_X_FORWARDED_FOR,REMOTE_ADDR.
Configures the IP address or hostname where Xdebug will attempt to connect to when initiating adebugging connection. This address should be the address of the machine where your IDE or debuggingclient is listening for incoming debugging connections.
On non-Windows platforms, it is also possible to configure a Unix domain socket which is supported byonly a select view debugging clients. In that case, instead of the hostname or IP address, useunix:///path/to/sock.
If xdebug.discover_client_host is enabled then Xdebug will only use the value of this setting incase Xdebug can not connect to an IDE using the information it obtained from HTTP headers. In thatcase, the value of this setting acts as a fallback only.
The port to which Xdebug tries to connect on the remote host. Port9003 is the default for both Xdebug and the Command Line Debug Client.As many clients use this port number, it is best to leave this settingunchanged.
The amount of time in milliseconds that Xdebug will wait for on anIDE to acknowledge an incoming debugging connection. The default value of 200ms should in most cases be enough. In case you often get dropped debuggingrequests, perhaps because you have a high latency network, or a development boxfar away from your IDE, or have a slow firewall, then you can should increasethis value.
If enabled, Xdebug will first try to connect to the client that made theHTTP request. It checks the $_SERVER['HTTP_X_FORWARDED_FOR'] and$_SERVER['REMOTE_ADDR'] variables to find out which hostname or IPaddress to use.
Controls which IDE Key Xdebug should pass on to the debugging client orproxy. The IDE Key is only important for use with the DBGp Proxy Tool,although some IDEs are incorrectly picky as to what its value is.
Xdebug's profiler will only start when either the environment variableXDEBUG_TRIGGER is set to StartProfileForMe, the GETor POST variable XDEBUG_TRIGGER is set toStartProfileForMe, or when the cookie XDEBUG_TRIGGERhas the value StartProfileForMe.From Xdebug 3.1, it is possible to configure multiple values by using acomma separated list. In that case, Xdebug will trigger if the supplied valuematches any of the entries that are configured through this setting: fa1130e720