Apex
Mastering Apex: Using sObjects as Map Keys Safely
Learn why using sObjects as Map keys in Apex can lead to bugs. Discover how field mutation impacts hashing and why using IDs is the better a...
Dev Codex — Expert Developer Tutorials & Guides
Salesforce
Apex
Mastering Apex: Using sObjects as Map Keys Safely
Learn why using sObjects as Map keys in Apex can lead to bugs. Discover how field mutation impacts hashing and why using IDs is the better alternative for devs.
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WordPress
Security
How to Prevent WordPress Username Enumeration: A Complete Guide
Learn how to stop WordPress username enumeration and block WPScan attacks using .htaccess, PHP, and Nginx rules to secure your website's login credentials.
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Magento
Performance
How to Fix a Large core_url_rewrite Table in Magento: A Complete Guide
Learn how to optimize a massive core_url_rewrite table in Magento. Fix the indexing bug, apply SUPEE-389, and improve site performance with our expert guide.
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Drupal
Site Building
How to Change the Default Theme in Drupal Using Drush
Learn how to change your Drupal default theme using Drush when the UI is inaccessible. Fix site crashes and master the config-set command for modern Drupal.
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SharePoint
REST API
How to Detect SharePoint Edit Mode Using JavaScript: A Complete Guide
Learn how to check if a SharePoint page is in Edit Mode using JavaScript. Explore methods for Web Part pages, Wiki pages, and Publishing pages with code example...
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Sitecore
Configuration
How to Configure Sitecore Multi-Site Management: A Complete Guide
Learn how to configure Sitecore to serve multiple sites from one instance. This guide covers DNS, IIS bindings, site definition nodes, and SXA alternatives.
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Joomla
Security
How to Secure Your Joomla Site: The Ultimate Security Checklist
Learn how to secure your Joomla installation with our comprehensive guide. From 2FA to server hardening, protect your site against hackers and malware effective...
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Craft CMS
Templating
How to Get Children from a Structure Entry in Craft CMS
Learn how to fetch child entries from Craft CMS Structure sections using entry.children, descendantOf, and level parameters for dynamic site navigation.
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CiviCRM
Memberships
CiviCRM Recurring Membership: How to Set Start Dates to the 1st of the Month
Learn how to configure CiviCRM recurring memberships to bill on the 1st of the month using Stripe, iATS, or custom extensions for better financial tracking.
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Developer Tutorials Built from Real-World Solutions
Dev Codex publishes in-depth, community-sourced developer tutorials across 9 major technology platforms. Every article starts with a highly-rated, community-vetted Q&A from established developer forums — then our editorial team expands it into a comprehensive, step-by-step guide with working code examples, best practices, and common pitfalls to avoid.
Whether you're building Salesforce integrations, customizing WordPress themes, debugging Magento checkout flows, or configuring SharePoint workflows — our tutorials are written by developers, for developers. No filler, no fluff. Just clear explanations, tested code, and practical solutions you can apply immediately in your projects.
9
Platforms Covered
42
Free Developer Tools
100%
Community-Sourced
WordPress
See all →
Security
How to Prevent WordPress Username Enumeration: A Complete Guide
Learn how to stop WordPress username enumeration and block WPScan attacks using .htaccess, PHP, and Nginx rules to secure your website's log...
Magento
See all →
Performance
How to Fix a Large core_url_rewrite Table in Magento: A Complete Guide
Learn how to optimize a massive core_url_rewrite table in Magento. Fix the indexing bug, apply SUPEE-389, and improve site performance with ...
Drupal
See all →
Site Building
How to Change the Default Theme in Drupal Using Drush
Learn how to change your Drupal default theme using Drush when the UI is inaccessible. Fix site crashes and master the config-set command fo...
SharePoint
See all →
REST API
How to Detect SharePoint Edit Mode Using JavaScript: A Complete Guide
Learn how to check if a SharePoint page is in Edit Mode using JavaScript. Explore methods for Web Part pages, Wiki pages, and Publishing pag...
Sitecore
See all →
Configuration
How to Configure Sitecore Multi-Site Management: A Complete Guide
Learn how to configure Sitecore to serve multiple sites from one instance. This guide covers DNS, IIS bindings, site definition nodes, and S...
Joomla
See all →
Security
How to Secure Your Joomla Site: The Ultimate Security Checklist
Learn how to secure your Joomla installation with our comprehensive guide. From 2FA to server hardening, protect your site against hackers a...
Craft CMS
See all →
Templating
How to Get Children from a Structure Entry in Craft CMS
Learn how to fetch child entries from Craft CMS Structure sections using entry.children, descendantOf, and level parameters for dynamic site...
CiviCRM
See all →
Memberships
CiviCRM Recurring Membership: How to Set Start Dates to the 1st of the Month
Learn how to configure CiviCRM recurring memberships to bill on the 1st of the month using Stripe, iATS, or custom extensions for better fin...
