Category: PHP

Distinguish valid false values from invalid input when using FILTER_VALIDATE_BOOLEAN and FILTER_NULL_ON_FAILURE in PHP.

Prevent PHP ValueError exceptions by defining how an empty data set should behave before calling min() or max().

Validate TCP ports as integers from 1 through 65535 before passing them to fsockopen() or stream_socket_client().

Avoid readonly-property errors when array_walk() receives a PHP array property by reference, using foreach or a local copy instead.

Trace PHP reCAPTCHA siteverify connection timeouts, compare IPv4 and IPv6 paths, and keep verification fail-closed.

Understand why PHP headers_sent can return true with a blank filename and line zero, then trace output created before script execution.

Validate configurable character-set names and catch ValueError when PHP mbstring receives an unsupported encoding.

Use the WordPress enqueue hook with WooCommerce is_product so a front-end script loads only on individual product pages.

Import attribute classes explicitly and exercise ReflectionAttribute::newInstance in tests so misspelled or unresolved metadata cannot become a silent no-op.

Test DNS and HTTPS from inside the PHP container, then correct Docker, proxy, certificate, or IPv6 connectivity before retrying Composer.