Plan to add cron arguments into logging as debug output:

• Understand the current code structure and event object
• Add WP_CLI::debug() call to log event arguments after successful execution
• Format arguments appropriately (handle empty arrays, serialize complex data)
• Add test case to verify debug output with arguments
• Run code review - no issues found
• Run security check - no vulnerabilities found
• Fix PHPCS error (use single quotes)
• Fix test assertion to match actual debug output format
• Fix test to check STDERR for debug output

Summary

This PR adds debug output to show cron event arguments when executing cron events with the wp cron event run command. This addresses the feature request to include argument information in logging, particularly useful for events like publish_future_post where seeing the post ID would be helpful for debugging.

Changes Made

1. Modified src/Cron_Event_Command.php:

   • Added WP_CLI::debug() call after the execution log message
   • Debug output only appears when --debug=cron flag is used
   • Arguments are displayed as JSON using wp_json_encode() for readability
   • Only displays when event has non-empty arguments
   • Fixed PHPCS error by using single quotes instead of double quotes

2. Added test in features/cron-event.feature:

   • Tests execution with arguments and verifies debug output appears in STDERR
   • Tests execution without arguments and verifies no debug output appears
   • Uses "I try" to properly test STDERR output
   • Ensures backward compatibility

Example Usage

# Schedule an event with arguments
wp cron event schedule my_event now --0=123 --1=my-value

# Run with debug output enabled
wp cron event run my_event --due-now --debug=cron

# Output will include:
# Executed the cron event 'my_event' in 0.001s. (STDOUT)
# Debug: Arguments: ["123","my-value"] (STDERR)

The implementation is minimal, backward compatible, and follows WP-CLI best practices for debug output.

• Fixes Feature request: Add cron arguments into logging #41

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