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Troubleshooting Common PixelYourSite PHP Warnings and Errors

26 threads Sep 9, 2025 Plugin → Pixelyoursite – your smart pixel (tag) & api manager

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If you use the PixelYourSite plugin, you might have encountered PHP warnings or errors in your server logs or WordPress admin area. These messages, while often not causing visible site breaks, can fill up logs and indicate underlying issues. Based on community reports, here are some of the most common problems and their solutions.

1. "Headers Already Sent" Warnings

This is one of the most frequently reported issues. You might see errors like:

PHP Warning: Cannot modify header information - headers already sent in .../pixelyoursite/includes/class-pys.php on line 194
PHP Warning: Cannot modify header information - headers already sent in .../pixelyoursite/includes/class-events-manager.php on line 58

Why This Happens:

This warning occurs when the plugin tries to send HTTP headers after some output has already been sent to the browser. Even invisible whitespace or a warning message can trigger this.

Common Solutions:

  • Update the Plugin: The PixelYourSite team has addressed this issue in various updates. For example, version 9.4.4 was released to fix a specific instance of this problem. Always ensure you are running the latest version.
  • Disable Automatic Events: In some cases, users found that disabling the "Track key actions with the automatic events" option in the General settings stopped the warnings. This can serve as a temporary workaround while waiting for an official fix.
  • Check for Conflicting Plugins/Themes: A conflict with another plugin or your theme can sometimes cause premature output. Try a conflict test by temporarily disabling other plugins and switching to a default theme like Twenty Twenty-Four.

2. "Use of undefined constant PYS_VERSION"

Users on PHP 7.4 reported this specific warning:

Use of undefined constant PYS_VERSION - assumed 'PYS_VERSION' in .../pixelyoursite/includes/functions-migrate.php on line 24

Why This Happens:

This was a bug introduced in version 9.1.0 of the plugin where a constant was not properly defined before being used.

The Solution:

This issue was specifically fixed in PixelYourSite version 9.1.1. Updating to this version or any later release will resolve the warning. If you encounter this, a simple plugin update is the answer.

3. "Attempt to read property on int" and "Undefined array key" Warnings

These notices are common when moving to stricter PHP versions like 8.0 or 8.1. Examples include:

PHP Warning: Attempt to read property "post_title" on int in .../functions-common.php on line 1121
PHP Warning: Undefined array key "REMOTE_ADDR" in .../class-pys.php on line 522

Why This Happens:

PHP 8.0+ has more strict error handling for undefined variables, array keys, and property access on non-objects. Code that ran without notices on PHP 7.4 might trigger warnings in newer environments.

Common Solutions:

  • The Plugin is Compatible: The PixelYourSite team has stated the plugin is tested and compatible with PHP 8.x. These warnings are often logged in debug logs but do not affect public site functionality.
  • Update Anyway: Many of these strictness warnings are patched in subsequent plugin updates. Keeping PixelYourSite updated ensures you have the latest compatibility fixes.
  • Server Configuration: If the warnings are not causing issues, you can adjust your PHP error reporting level to not log warnings. However, this is a general server-level change and not specific to this plugin.

4. General Troubleshooting Steps

For any persistent issue, follow this basic troubleshooting checklist:

  1. Update Everything: First, update PixelYourSite, your WordPress core, theme, and all other plugins. Many problems are resolved by simply being on the latest versions.
  2. Reinstall the Plugin: If an update seems to have failed or caused a problem, a fresh install can help. Important: Always backup your site first. Then, delete the PixelYourSite plugin from your WordPress dashboard and install it again. Your settings are stored in the database and should be preserved.
  3. Conflict Test: Temporarily switch to a default WordPress theme (e.g., Twenty Twenty-Four) and disable all other plugins. If the problem goes away, re-enable them one by one to identify the conflict.
  4. Check Logs: Enable WordPress debug logging by adding the following to your wp-config.php file. This will provide more detailed error information. 
    define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true ); // Logs errors to wp-content/debug.log
define( 'WP_DEBUG_DISPLAY', false ); // Prevents errors from being shown on screen

By following these steps, you can diagnose and resolve the most common PixelYourSite errors reported by the community. Most issues are fixed by keeping the plugin updated to the latest version.

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