Best Practices and Optimization

Use Composer, PSR conventions, strict types, dependency injection, cohesive services, immutable values, contextual escaping, parameterized SQL, secure sessions, and explicit configuration.

Practical example

<?php
function average(array $values): float {
  if ($values === []) return 0.0;
  return array_sum($values) / count($values);
}

Run formatters, linters, static analysis, dependency audits, and build validation. Profile representative requests before changing code. Database query count/indexes, network calls, caching, autoloading, OPcache, and serialization often dominate micro-optimizations. Protect secrets and make logs/metrics traceable without sensitive data.