PHPCS doesn't recongnize namespace\function() syntax.

[azjezz]

Describe the bug
A clear and concise description of what the bug is.

Code sample

<?php

namespace Foo;

$e = namespace\count([1, 2]);

Custom ruleset

<?xml version="1.0"?>
<ruleset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="PSL"
         xsi:noNamespaceSchemaLocation="vendor/squizlabs/php_codesniffer/phpcs.xsd">
    <file>src</file>
    <file>tests</file>

    <arg name="basepath" value="."/>
    <arg name="colors"/>
    <arg name="parallel" value="75"/>

    <rule ref="PSR1">
        <type>error</type>
    </rule>

    <rule ref="PSR2">
        <type>error</type>
    </rule>

    <rule ref="PSR12">
        <type>error</type>
    </rule>

    <!-- Don't hide tokenizer exceptions -->
    <rule ref="Internal.Tokenizer.Exception">
        <type>error</type>
    </rule>

    <!-- Ban some functions -->
    <rule ref="Generic.PHP.ForbiddenFunctions">
        <properties>
            <property name="forbiddenFunctions" type="array">
                <element key="sizeof" value="count"/>
                <element key="delete" value="unset"/>
            </property>
        </properties>
    </rule>
</ruleset>

To reproduce
Steps to reproduce the behavior:

1. Create a file called test.php with the code sample above...
2. Run phpcs test.php ...
3. See error message displayed

-------------------------------------------------------------------------------
FOUND 1 ERROR AFFECTING 1 LINE
-------------------------------------------------------------------------------
 40 | ERROR | [x] There must be one blank line after the namespace declaration
-------------------------------------------------------------------------------
PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
-------------------------------------------------------------------------------

Expected behavior
No issues.

Versions (please complete the following information):

• OS: irrelevant
• PHP: 7.4, 8.0
• PHPCS: 3.5.8

Additional context

using namespace\count to call a function is different than using count() and \count().

1. namespace\count(): use count() from the current namespace, don't try to fallback to global count
2. count(): use count() from current namespace, if not found, fallback to global namespace
3. \count(): use count() from global namespace

see: https://3v4l.org/enMgi

[jrfnl]

Would you mind testing with master ? I believe this has already been fixed via #3184.

[azjezz]

It seems to work! thank you for you work 🎉

[jrfnl]

Thanks for confirming!