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${} string interpolation is deprecated in 8.2

NoteDecember 5, 20222 min read

Two of the four string interpolation syntaxes are deprecated, and they are the two that are ambiguous to read. The dollar-brace form is the one that makes a…

#[AllowDynamicProperties], and when it is honest

NoteDecember 5, 20222 min read

The attribute opts a class out of the deprecation, which is occasionally correct and is usually a way of deferring a rename. Inheritance of the attribute is the…

A template part area is a taxonomy term

NoteNovember 23, 20222 min read

Declaring a part as a header or a footer is what makes it appear in the right place in the editor, and the mechanism underneath is a taxonomy.…

Serialising an enum, and the case that was renamed

NoteNovember 15, 20222 min read

serialize on a pure enum stores the case name, and on a backed enum stores the value, which makes the two behave differently across a rename. Native serialisation…

A queue worker that scales on the metric that matters

Deep diveNovember 9, 202210 min read

Six workers, always, whether there is work or not. A backlog at 09:00 and idle capacity at 03:00.

array_is_list, and the JSON object you did not mean to send

NoteNovember 9, 20222 min read

An array that was a list and had an element removed is no longer one, and json_encode silently emits an object instead of an array. This reaches a…

An idempotent consumer for a broker that redelivers

Deep diveNovember 8, 202210 min read

A message processed twice, and a customer charged twice. At-least-once delivery, treated as exactly-once by the handler.

realpath_cache_size, on a bind-mounted volume

NoteNovember 8, 20221 min read

Every file resolution is a stat, and on a bind mount each one crosses a filesystem boundary — which is why this setting matters most where it is…

Two teams, one database, and the schema change that needed a meeting

Deep diveOctober 29, 202210 min read

A shared schema, and a rename that took three weeks to coordinate. Table ownership that exists in nobody’s head.

opcache.jit is on and your web request is unchanged

NoteOctober 19, 20221 min read

The JIT compiles hot code paths to machine code and helps almost nothing in a typical web request, where the time is in I/O. Reporting a benchmark improvement…