[PHP-NOTES] note 130478 added to function.strtotime

An interesting gotcha I found today which took a second to track down.

strtotime will return false with an empty string, or something that is clearly not a date.  But whitespace returns the current time.

<?php
$date = '';
$utc = strtotime($date);
var_dump($date);
var_dump($utc);

$date = 'notADate';
$utc = strtotime($date);
var_dump($date);
var_dump($utc);

$date = ' ';
$utc = strtotime($date);
var_dump($date);
var_dump($utc);
?>

Will return:
string(0) ""
bool(false)
string(8) "notADate"
bool(false)
string(1) " "
int(1757608141)
----
Server IP: 45.112.84.4
Probable Submitter: 45.112.84.18 (proxied: 206.195.188.253)
----
Manual Page -- https://php.net/manual/en/function.strtotime.php
Edit        -- https://main.php.net/note/edit/130478
Del: integrated  -- https://main.php.net/note/delete/130478/integrated
Del: useless     -- https://main.php.net/note/delete/130478/useless
Del: bad code    -- https://main.php.net/note/delete/130478/bad+code
Del: spam        -- https://main.php.net/note/delete/130478/spam
Del: non-english -- https://main.php.net/note/delete/130478/non-english
Del: in docs     -- https://main.php.net/note/delete/130478/in+docs
Del: other reasons-- https://main.php.net/note/delete/130478
Reject      -- https://main.php.net/note/reject/130478
Search      -- https://main.php.net/manage/user-notes.php