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Implicit route model binding removes the find()

NoteJanuary 26, 20162 min read

Every controller method that takes an id begins the same way: find the record, check it exists, abort with a 404. Multiply that by every route and it…

strict_types applies to the calls a file makes, not the calls it receives

NoteJanuary 19, 20161 min read

The rule reads backwards from how everyone assumes it works. declare(strict_types=1) governs the calls made from that file, not the calls made into the functions declared in it.…

list() is a language construct and never was a function

NoteJanuary 14, 20161 min read

list() looks like a function call and behaves like an assignment target, which is why it can appear on the left of = and why it cannot be…

Return types make a refactor fail at the boundary

NoteJanuary 12, 20161 min read

A docblock @return is a comment; the engine never reads it, so a method that starts returning null on a Tuesday fails somewhere else on a Thursday. A…

PHP 7 halved the memory, which changes the pool size

NoteJanuary 12, 20161 min read

The upgrade is usually measured in request latency. The larger operational change is memory: PHP 7 rewrote the internal value representation, and arrays in particular use a fraction…

intdiv() says what the floor division meant

NoteJanuary 8, 20161 min read

Integer division in PHP has always been (int) ($a / $b) or floor($a / $b), both of which route through a float — so past 253 the answer…

SplObjectStorage is the object set PHP does not advertise

NoteDecember 31, 20152 min read

Objects cannot be array keys, so checking whether an object is already in a collection usually turns into in_array($obj, $list, true) — a linear scan that gets slower…

Testing time-dependent code means injecting the clock

NoteDecember 25, 20152 min read

Code that calls time() or new DateTime() internally cannot be tested at a chosen moment. The usual workarounds are a sleep() in the test, which makes the suite…

set_error_handler turns warnings into exceptions

NoteDecember 15, 20151 min read

A PHP warning does not stop execution. file_get_contents() on a missing file warns and returns false, and the code carries on with false where a string was expected…

Recursively delete a directory in PHP

SnippetDecember 3, 20151 min read