Impact analysis proposed PHP 8.6 deprecation of readonly as function name on Packagist top 4000

0-php-rfc-deprecations-8.6-identifier-readonly-as-function.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.Keywords.ForbiddenNames.readonlyFound"/>

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

</ruleset>

1 - 20260702-report-source.txt

PHP CODE SNIFFER VIOLATION SOURCE SUMMARY
----------------------------------------------------------------------
SOURCE                                                           COUNT
----------------------------------------------------------------------
PHPCompatibility.Keywords.ForbiddenNames.readonlyFound           2
----------------------------------------------------------------------
A TOTAL OF 2 SNIFF VIOLATIONS WERE FOUND IN 1 SOURCE
----------------------------------------------------------------------

2 - 20260702-report-summary.txt

PHP CODE SNIFFER REPORT SUMMARY
-----------------------------------------------------------------------------------------
FILE                                                                     ERRORS  WARNINGS
-----------------------------------------------------------------------------------------
johnpbloch\wordpress-core--7.0.0\wp-includes\php-compat\readonly.php     1       0
roots\wordpress-no-content--7.0\wp-includes\php-compat\readonly.php      1       0
-----------------------------------------------------------------------------------------
A TOTAL OF 2 ERRORS AND 0 WARNINGS WERE FOUND IN 2 FILES
-----------------------------------------------------------------------------------------

3 - 20260702-report-code.txt

FILE: johnpbloch\wordpress-core--7.0.0\wp-includes\php-compat\readonly.php
------------------------------------------------------------------------------------------------------------------------------------------------------
FOUND 1 ERROR AFFECTING 1 LINE
------------------------------------------------------------------------------------------------------------------------------------------------------
LINE 34: ERROR Function name, class name, namespace name or constant name can not be reserved keyword 'readonly' (since version 8.1)
               (PHPCompatibility.Keywords.ForbiddenNames.readonlyFound)
------------------------------------------------------------------------------------------------------------------------------------------------------
   32:   * @return string HTML attribute or empty string.
   33:   */
>> 34:  function readonly( $readonly_value, $current = true, $display = true ) {
   35:   _deprecated_function( __FUNCTION__, '5.9.0', 'wp_readonly()' );
   36:   return wp_readonly( $readonly_value, $current, $display );
------------------------------------------------------------------------------------------------------------------------------------------------------

FILE: roots\wordpress-no-content--7.0\wp-includes\php-compat\readonly.php
------------------------------------------------------------------------------------------------------------------------------------------------------
FOUND 1 ERROR AFFECTING 1 LINE
------------------------------------------------------------------------------------------------------------------------------------------------------
LINE 34: ERROR Function name, class name, namespace name or constant name can not be reserved keyword 'readonly' (since version 8.1)
               (PHPCompatibility.Keywords.ForbiddenNames.readonlyFound)
------------------------------------------------------------------------------------------------------------------------------------------------------
   32:   * @return string HTML attribute or empty string.
   33:   */
>> 34:  function readonly( $readonly_value, $current = true, $display = true ) {
   35:   _deprecated_function( __FUNCTION__, '5.9.0', 'wp_readonly()' );
   36:   return wp_readonly( $readonly_value, $current, $display );
------------------------------------------------------------------------------------------------------------------------------------------------------