How to debug a WordPress application with PHP functions using WP Debugger?

Use WP Debugger to debug PHP functions: 1) Install and activate the plugin; 2) Enable "Debug PHP" in the "Settings" tab; 3) Add breakpoints and navigate to the code that calls the function; 4) View the toolbar and check the variable values; 5) Execute the code line by line and update the inconsistencies.

How to use WP Debugger to debug a WordPress application with PHP functions

Introduction

WP Debugger is an excellent tool that allows you to easily debug PHP functions in your WordPress application. This article will guide you on how to install and use this plugin to debug PHP functions.

Installation

1. Log in to your WordPress dashboard.
2. In the left menu, click "Plugins" - "Add Plug-in".
3. Enter "WP Debugger" in the search bar.
4. Install and activate the plugin.

Using WP Debugger

1. Go to the "WP Debugger" option in the dashboard.
2. Click on the "Settings" tab.
3. Enable the "Debug PHP" option.

Example case

Let us take debugging a custom PHP function that calculates the length of a string as an example:

function get_string_length($string) {
  if (empty($string)) {
    return 0;
  } else {
    return strlen($string);
  }
}

Suppose we want Make sure the function handles empty strings correctly and returns a valid length.

Debugging process

1. In the code, add a breakpoint on the line that needs to be debugged (for example, return 0;).
2. Navigate to your site and trigger the code that calls the function.
3. The WP Debugger toolbar will appear, showing the code execution status.
4. Click the "Inspect" tab to view the values ​​and status of variables.
5. Check the variable $string and make sure it contains an empty string.
6. Execute the code line by line, carefully checking the variable values.
7. If you find any inconsistencies, please update the code accordingly.

By following these steps, you can use WP Debugger to effectively debug PHP functions in your WordPress application.

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