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<?php date_default_timezone_set('America/New_York'); $InitialDateTime = DateTime::createFromFormat('U', '1409611999'); $firstDayofWeek = clone $InitialDateTime; $firstDayofWeek->modify('Monday This Week'); $lastDayofWeek = clone $InitialDateTime; $lastDayofWeek->modify('Sunday Next'); var_dump($initialDateTime, $firstDayofWeek, $lastDayofWeek);
Output for 8.3.0 - 8.3.6
Fatal error: Uncaught DateMalformedStringException: DateTime::modify(): Failed to parse time string (Sunday Next) at position 7 (N): The timezone could not be found in the database in /in/cV1bg:10 Stack trace: #0 /in/cV1bg(10): DateTime->modify('Sunday Next') #1 {main} thrown in /in/cV1bg on line 10
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Warning: DateTime::modify(): Failed to parse time string (Sunday Next) at position 7 (N): The timezone could not be found in the database in /in/cV1bg on line 10 Warning: Undefined variable $initialDateTime in /in/cV1bg on line 12 NULL object(DateTime)#2 (3) { ["date"]=> string(26) "2014-09-01 00:00:00.000000" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" } object(DateTime)#3 (3) { ["date"]=> string(26) "2014-09-01 22:53:19.000000" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" }
Output for 5.4.30 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Warning: DateTime::modify(): Failed to parse time string (Sunday Next) at position 7 (N): The timezone could not be found in the database in /in/cV1bg on line 10 Notice: Undefined variable: initialDateTime in /in/cV1bg on line 12 NULL object(DateTime)#2 (3) { ["date"]=> string(26) "2014-09-01 00:00:00.000000" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" } object(DateTime)#3 (3) { ["date"]=> string(26) "2014-09-01 22:53:19.000000" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" }
Output for 7.3.32 - 7.3.33
Warning: DateTime::modify(): Failed to parse time string (Sunday Next) at position 7 (N): The timezone could not be found in the database in /in/cV1bg on line 10 NULL object(DateTime)#2 (3) { ["date"]=> string(26) "2014-09-01 00:00:00.000000" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" } object(DateTime)#3 (3) { ["date"]=> string(26) "2014-09-01 22:53:19.000000" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" }
Output for 5.3.6 - 5.3.8, 5.4.8 - 5.4.29
Warning: DateTime::modify(): Failed to parse time string (Sunday Next) at position 7 (N): The timezone could not be found in the database in /in/cV1bg on line 10 Notice: Undefined variable: initialDateTime in /in/cV1bg on line 12 NULL object(DateTime)#2 (3) { ["date"]=> string(19) "2014-09-01 00:00:00" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" } object(DateTime)#3 (3) { ["date"]=> string(19) "2014-09-01 22:53:19" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" }
Output for 5.3.9 - 5.3.29, 5.4.0 - 5.4.7
Warning: DateTime::modify(): Failed to parse time string (Sunday Next) at position 7 (N): The timezone could not be found in the database in /in/cV1bg on line 10 Notice: Undefined variable: initialDateTime in /in/cV1bg on line 12 NULL object(DateTime)#2 (3) { ["date"]=> string(19) "2014-09-01 01:00:00" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" } object(DateTime)#3 (3) { ["date"]=> string(19) "2014-09-01 22:53:19" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" }
Output for 5.3.2 - 5.3.5
Warning: DateTime::modify(): Failed to parse time string (Sunday Next) at position 7 (N): The timezone could not be found in the database in /in/cV1bg on line 10 Notice: Undefined variable: initialDateTime in /in/cV1bg on line 12 NULL object(DateTime)#2 (3) { ["date"]=> string(19) "2014-09-01 22:53:19" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" } object(DateTime)#3 (3) { ["date"]=> string(19) "2014-09-01 22:53:19" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" }
Output for 5.3.0 - 5.3.1
Notice: Undefined variable: initialDateTime in /in/cV1bg on line 12 NULL object(DateTime)#2 (3) { ["date"]=> string(19) "2014-09-01 22:53:19" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" } object(DateTime)#3 (3) { ["date"]=> string(19) "2014-09-07 22:53:19" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" }
Output for 5.2.10 - 5.2.17
Fatal error: Call to undefined method DateTime::createFromFormat() in /in/cV1bg on line 4
Process exited with code 255.
Output for 5.2.0 - 5.2.9
Fatal error: Call to undefined method DateTime::createfromformat() in /in/cV1bg on line 4
Process exited with code 255.
Output for 5.1.0 - 5.1.6
Fatal error: Class 'DateTime' not found in /in/cV1bg on line 4
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Fatal error: Call to undefined function date_default_timezone_set() in /in/cV1bg on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_VARIABLE in /in/cV1bg on line 6
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_VARIABLE in /in/cV1bg on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/cV1bg on line 6
Process exited with code 255.

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