Intermediate terms
Regex in Loop
PHP 5.0+
Compiling and executing the same regular expression on every iteration of a loop — hoist the pattern outside.
3mo ago
performance intermediate
Regex Syntax
PHP 5.3+
Regular expression syntax — anchors, quantifiers, character classes, groups, and alternation — the building blocks for pattern matching in PHP and all languages.
3mo ago
regex intermediate
Remote File Inclusion (RFI)
PHP 5.0+
An attacker tricks include() or require() into loading a PHP file from an attacker-controlled remote URL, achieving code execution.
CWE-98 OWASP A3:2021
3mo ago
security intermediate
9.8
Render-Blocking Resources
CSS and synchronous JavaScript in <head> that prevent the browser from rendering any content until they are downloaded and parsed — the primary cause of slow First Contentful Paint.
3mo ago
frontend intermediate
Replay Attack
PHP 5.0+
An attacker captures a valid request or authentication token and resubmits it later to gain unauthorised access or repeat an action.
CWE-294 OWASP A2:2021
3mo ago
security intermediate
7.5
Responsible Vulnerability Disclosure
The practice of privately reporting security vulnerabilities to vendors before publishing, allowing time for a fix.
3mo ago
general intermediate
REST Architectural Constraints
PHP 5.0+
The six constraints Fielding defined for REST — statelessness, uniform interface, client-server separation, cacheability, layered system, and optional code on demand.
3mo ago
api_design intermediate
Retry Pattern with Exponential Backoff
PHP 5.0+ Automatically retrying failed operations with increasing delays — preventing thundering herd and handling transient failures gracefully.
3mo ago
architecture intermediate
Reverse Proxy vs Load Balancer
A reverse proxy forwards client requests to backend servers, adding SSL termination, caching, and compression. A load balancer distributes traffic across multiple backends for scalability.
3mo ago
networking intermediate
Right-to-Left Language Support
HTML5
2
Design and implementation considerations for RTL languages (Arabic, Hebrew, Persian, Urdu) — text direction, mirrored layouts, and bidirectional text handling.
3mo ago
i18n intermediate
Rolling Deployment
Gradually replacing old application instances with new ones, a few at a time, so the service remains available throughout the upgrade.
3mo ago
devops intermediate
Rate Limiting
PHP 5.0+
Restricting the number of requests a client can make in a given time window to prevent abuse, DoS, and credential stuffing.
CWE-770 OWASP A5:2021
3mo ago
performance intermediate
Repository Pattern
PHP 5.0+
2
Abstracts the data persistence layer behind an interface, decoupling domain logic from database implementation details.
3mo ago
general intermediate
RangeError — Stack Overflow & Invalid Values
ES5
RangeError is thrown when a value is outside its allowed range — most commonly from infinite recursion (stack overflow) or invalid array/string sizes.
javascript intermediate