UNIX_TIMETAMP: Add support for zero timestamps

Author: jdpanderson

src/Vectorface/MySQLite/MySQL/DateTime.php

@@ -47,6 +47,8 @@ public static function mysql_unix_timestamp($date = null)
     {
         if (!isset($date)) {
             return time();
+        } elseif (count_chars(str_replace([":", "-", " "], "", $date), 3) === "0") {
+            return 0; /* MySQL's implementation returns zero for 0000-00-00 00:00:00 and similar */
         }
 
         return strtotime($date);

tests/Vectorface/Tests/MySQLite/MySQLiteTest.php

@@ -46,6 +46,8 @@ public function testDateTimeFunctions()
         $this->assertEquals(718613, MySQLite::mysql_to_days("1967-07-01"));
         $this->assertEquals(735599, MySQLite::mysql_to_days("2014-01-01"));
         $this->assertEquals(time(), MySQLite::mysql_unix_timestamp());
+        $this->assertEquals(0, MySQLite::mysql_unix_timestamp("0000-00-00 00:00:00"));
+        $this->assertEquals(0, MySQLite::mysql_unix_timestamp("0000-00-00"));
         $time = time();
         $this->assertEquals($time, MySQLite::mysql_unix_timestamp(date("Y-m-d H:i:s")));
     }