This topic only applies to Visual Studio 2019 and later. Visual Studio 2017 and older do not support diagnostics filtering.

The feature is supported since PHP Tools for Visual Studio, Version 1.40.12066 and newer.

Diagnostics Configuration

Code diagnostics are highlighted in the code editor and in the Visual Studio's Error List tool window. Each reported diagnostic has an error code in form PHPxxxx, for example PHP0412. By default, diagnostics are reported with severity like fatal error, error, warning, or message. The severity can be altered in the configuration, or even suppressed.

.editorconfig

In order to configure diagnostics, edit or create .editorconfig file within the project directory. The file can be nested in a sub-directory. For more information, see docs.microsoft.com.

To configure a diagnostic, add section matching the file names applying to, by default it would be [*.php].

[*.php]
php_diagnostic_php6401 = false
php_diagnostic = true

Add rules, according to the diagnostic error code.

Rule format

Rules are in format php_diagnostic_php[ERROR_CODE] = [VALUE] (lower cased). Possible values are:

• true, on: the diagnostic will be listed with its default severity.
• false, silent, off, none: the diagnostic won't be listed.
• fatalerror: the diagnostic will be listed as fatal error.
• error: the diagnostic will be listed as error.
• warning: the diagnostic will be listed as a warning.
• message, suggestion: the diagnostic will be listed as a message.

[*.php]
php_diagnostic_php6401 = message
php_diagnostic_php6402 = false

For all the diagnostics with any error code, use rule in format php_diagnostic = [VALUE].

[*Test.php]
php_diagnostic = error

Note, rule with the error code (php_diagnostic_php[ERROR_CODE]) has a precedence over the rule without the error code (php_diagnostic).

Code editor will always highlight fatal errors, even tho the error will be suppressed using false, off, none, or silent rule.

@suppress PHPDoc tag

Problems can be suppressed for a specified function or a class only. Following PHPDoc tags allows to suppress warnings in the associated function block or class block: @suppresswarnings, @suppress, or @suppresswarning.

<?php

/**
 * @suppress PHP6401
 */
function foo() {
    // something with error 6401, won't be reported
}

Suppressed error codes can be optionally separated by a comma or a space.