DateTimeZone object is unconstructed

Description

IntlTimeZone::fromDateTimeZone() converts a DateTimeZone object into an IntlTimeZone one. To do so, it reads the internal timezone data that DateTimeZone::__construct() normally sets up.

If it is given a DateTimeZone instance that was created without going through its constructor – for example via ReflectionClass::newInstanceWithoutConstructor(), or an object left in a broken state after a failed unserialize() – that internal data is missing, and the conversion cannot proceed.

Example

<?php

$tz = (new ReflectionClass(DateTimeZone::class))->newInstanceWithoutConstructor();

// The object exists, but __construct() was never called
IntlTimeZone::fromDateTimeZone($tz);

?>

Solutions

• Always create the DateTimeZone with new DateTimeZone($identifier) rather than bypassing its constructor.

• If the object comes from unserialization, verify it succeeded and produced a valid object before using it.

• Wrap the call in a try/catch (Error) if the DateTimeZone instance’s origin cannot be controlled.

Related Error Messages

• The SQLite3 object has not been correctly initialised or is already closed

• IntlListFormatter object is already constructed

See Also

• IntlTimeZone::fromDateTimeZone

• DateTimeZone

Changed Behavior

This error may appear following an evolution in behavior, in previous versions. See ` <https://php-changed-behaviors.readthedocs.io/en/latest/behavior/.html>`_.