In the following code:
$t = microtime(true);
$now = DateTime::createFromFormat('U.u', $t);
$now = $now->format("H:i:s.v");
Trying to format() will return a fatal error if microtime(true) just so happened to return a float with all zeros as decimals. This is because DateTime::createFromFormat('U.u', $aFloatWithAllZeros) returns false.
Workaround (the while loop is for testing if the solution works):
$t = microtime(true);
$now = DateTime::createFromFormat('U.u', $t);
while (!is_bool($now)) {//for testing solution
$t = microtime(true);
$now = DateTime::createFromFormat('U.u', $t);
}
if (is_bool($now)) {//the problem
$now = DateTime::createFromFormat('U', $t);//the solution
}
$now = $now->format("H:i:s.v");
DateTime::createFromFormat
date_create_from_format
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
DateTime::createFromFormat -- date_create_from_format — Parses a time string according to a specified format
Description
Object-oriented style
public static DateTime::createFromFormat(string
$format, string $datetime, ?DateTimeZone $timezone = null): DateTime|falseProcedural style
date_create_from_format(string
$format, string $datetime, ?DateTimeZone $timezone = null): DateTime|false
Returns a new DateTime object representing the date and time specified by the
datetime string, which was formatted in the given
format.
Like DateTimeImmutable::createFromFormat() and date_create_immutable_from_format(), respectively, but creates a DateTime object.
This method, including parameters, examples, and considerations are documented on the DateTimeImmutable::createFromFormat page.
Parameters
Return Values
Returns a new DateTime instance or false on failure.
Errors/Exceptions
This method throws ValueError when the
datetime contains NULL-bytes.
Changelog
| Version | Description |
|---|---|
| 8.0.21, 8.1.8, 8.2.0 |
Now throws ValueError when NULL-bytes
are passed into datetime, which previously was silently
ignored.
|
Examples
For an extensive set of examples, see DateTimeImmutable::createFromFormat.
See Also
- DateTimeImmutable::createFromFormat() - Parses a time string according to a specified format
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User Contributed Notes 2 notes
Steven De Volder ¶
1 year ago
mariani dot v at sfeir dot com ¶
10 months ago
An easiest way to avoid error when microtime returns a non decimal float is to cast its result as a float using sprintf :
$t = microtime(true);
$now = DateTime::createFromFormat('U.u', sprintf('%f', $t));
$now = $now->format("H:i:s.v");
