EzyCoders Admin
Team Lead and Full-Stack Developer with experience in PHP, JavaScript, SQL, DSA, and System Design. Passionate about software engineering, scalable web technologies, and helping developers prepare for coding interviews and tech careers through practical tutorials and professional guidance.
Learn indexes, EXPLAIN, when to add them, and why over-indexing slows writes.
Learn scalar subqueries, IN, NOT IN, EXISTS, correlated subqueries, and derived tables.
PHP performance — OpCache, fixing N+1 queries, APCu caching, and profiling with Xdebug.
Learn SQL injection, XSS, CSRF, and secure file uploads — the top PHP security threats and their defences.
Learn validation vs sanitization, filter_var, custom rules, and a reusable Validator class.
Learn PHP magic methods — __construct, __destruct, __get, __set, __toString, __invoke.
