Impact analysis proposed PHP 8.6 deprecation of is_a() with string on Packagist top 4000

0-php-rfc-deprecations-8.6-is_a-allow_string.xml

<?xml version="1.0"?>
<ruleset name="Impact check for https://wiki.php.net/rfc/deprecations_php_8_6">

    <!-- This ruleset should only be used in conjunction with PHPCompatibility at commit
    https://github.com/PHPCompatibility/PHPCompatibility/commit/cc67a3824dda9612896f5892c2d6d9408fa20d77 -->
 
    <file>sources</file>

    <arg name="extensions" value="php"/>
    <arg value="ps"/>

    <arg name="basepath" value="./sources/"/>
    <arg name="parallel" value="8"/>

    <arg name="no-colors"/>
    <arg name="ignore-annotations"/>

    <arg name="report" value="code,summary,source"/>

    <exclude-pattern>*/vendor/*</exclude-pattern>
    <exclude-pattern>*/node_modules/*</exclude-pattern>

    <!-- We are specifically and only checking for the PHP 8.6 deprecation(s). -->
    <config name="testVersion" value="8.6"/>

    <rule ref="PHPCompatibility.ParameterValues.RemovedIsAAllowStringFalse"/>

    <rule ref="Internal.NoCodeFound">
        <severity>0</severity>
    </rule>
    <rule ref="Internal.LineEndings.Mixed">
        <severity>0</severity>
    </rule>

</ruleset>

1 - 20260702-report-source.txt

No occurances found.

2 - 20260702-report-summary.txt

No occurances found.

3 - 20260702-report-code.txt

No occurances found.