use \DateTime; // http://php.net/manual/en/class.datetime.php
use ArrayAccess; // http://php.net/manual/en/class.arrayaccess.php Interface to provide accessing objects as arrays.
use IteratorAggregate; // http://php.net/manual/en/class.iteratoraggregate.php Interface to create an external Iterator.
/*
use ArrayAccess; // http://php.net/manual/en/class.arrayaccess.php Interface to provide accessing objects as arrays.
use ArrayIterator; // http://php.net/manual/en/class.arrayiterator.php This iterator allows to unset and modify values and keys while iterating over Arrays and Objects.
use Countable; // http://php.net/manual/en/class.countable.php Classes implementing Countable can be used with the count() function.
use IteratorAggregate; // http://php.net/manual/en/class.iteratoraggregate.php Interface to create an external Iterator.
use Exception; // http://php.net/manual/en/class.exception.php Exception is the base class for all Exceptions in PHP 5, and the base class for all user exceptions in PHP 7.
use InvalidArgumentException; // http://php.net/manual/en/class.invalidargumentexception.php Exception thrown if an argument is not of the expected type.
use OutOfBoundsException; // http://php.net/manual/en/class.outofboundsexception.php Exception thrown if a value is not a valid key. This represents errors that cannot be detected at compile time.
use OutOfRangeException; // http://php.net/manual/en/class.outofrangeexception.php Exception thrown when an illegal index was requested. This represents errors that should be detected at compile time.
use BadMethodCallException; // http://php.net/manual/en/class.badmethodcallexception.php Exception thrown if a callback refers to an undefined method or if some arguments are missing.
use LengthException; // http://php.net/manual/en/class.lengthexception.php Exception thrown if a length is invalid.
use LogicException; // http://php.net/manual/en/class.logicexception.php Exception that represents error in the program logic. This kind of exception should lead directly to a fix in your code.
use DomainException; // http://php.net/manual/en/class.domainexception.php Exception thrown if a value does not adhere to a defined valid data domain.
use RangeException; // http://php.net/manual/en/class.rangeexception.php Exception thrown to indicate range errors during program execution. Normally this means there was an arithmetic error other than under/overflow. This is the runtime version of DomainException.
use UnexpectedValueException; // http://php.net/manual/en/class.unexpectedvalueexception.php Exception thrown if a value does not match with a set of values. Typically this happens when a function calls another function and expects the return value to be of a certain type or value not including arithmetic or buffer related errors.
use OverflowException; // http://php.net/manual/en/class.overflowexception.php Exception thrown when adding an element to a full container.
use UnderflowException; // http://php.net/manual/en/class.underflowexception.php Exception thrown when performing an invalid operation on an empty container, such as removing an element.
*/
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class Date implements IteratorAggregate, ArrayAccess
* Date::check([8, 5, 2017]) === true - year is 3rd array member, same as `checkdate` and MUST be over 100
* Date::check([30, 4, 2017]) === false - year is 3rd array member, same as `checkdate` BUT `day` MUST be 2nd param and `month` MUST be 3rd param like `checkdate()`
*
* @param mixed $str Value to modify, after being cast to string
* @return new Twister\Date isntance or false on failure
* @throws \InvalidArgumentException if an array or object without a
* __toString method is passed as the first argument
*/
public static function check(...$params)
{
return self::normalize(...$params) !== false;
}
/**
* Normalize a given value or values to MySQL date format (YYYY-MM-DD)
* Date::check([8, 5, 2017]) === true - year is 3rd array member, same as `checkdate` and MUST be over 100
* Date::check([30, 4, 2017]) === false - year is 3rd array member, same as `checkdate` BUT `day` MUST be 2nd param and `month` MUST be 3rd param like `checkdate()`
*
* @param mixed $str Value to modify, after being cast to string
* @return new Twister\Date isntance or false on failure
* @throws \InvalidArgumentException if an array or object without a
* __toString method is passed as the first argument
*/
public static function normalize(...$params)
{
switch (count($params))
{
case 2:
if ( ! is_bool($params[1]))
{
if (is_string($params[1])) // $params[1] can be a format like 'Y-m-d h:i' or whatever, we need to `extract` the date component to match '~^...$~' below
{
// TODO: extract date from format
}
return false;
}
else
{
if ($params[1] === true)
{
$date = $params[0];
if (is_string($date) && $date === '0000-00-00')
{
return $date; // `true` allows 0000-00-00
}
}
}
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// fallthrough
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case 1:
$date = $params[0];
if (is_string($date))
{
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if (preg_match('~^([1-9]\d\d\d)-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])$~', $date, $matches) === 1)
else if (preg_match('~([1-9]\d\d\d)[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])~', $date, $matches) === 1) // removed the ~^ ... $~ first & last matches! Also added more delimeters
case 'd': return ; // Day of the month, 2 digits with leading zeros eg. 01 to 31
case 'D': return ; // A textual representation of a day, three letters eg. Mon through Sun
case 'j': return ; // Day of the month without leading zeros eg. 1 to 31
case 'l': return ; // A full textual representation of the day of the week eg. Sunday through Saturday
case 'N': return ; // ISO-8601 numeric representation of the day of the week (added in PHP 5.1.0 eg. 1 (for Monday) through 7 (for Sunday)
case 'S': return ; // English ordinal suffix for the day of the month, 2 characters eg. st, nd, rd or th. Works well with j
case 'w': return ; // Numeric representation of the day of the week eg. 0 (for Sunday) through 6 (for Saturday)
case 'z': return ; // The day of the year (starting from 0) eg. 0 through 365
case 'W': return ; // ISO-8601 week number of year, weeks starting on Monday eg. Example: 42 (the 42nd week in the year)
case 'F': return ; // A full textual representation of a month, such as January or March eg. January through December
case 'm': return ; // Numeric representation of a month, with leading zeros eg. 01 through 12
case 'M': return ; // A short textual representation of a month, three letters eg. Jan through Dec
case 'n': return ; // Numeric representation of a month, without leading zeros eg. 1 through 12
case 't': return ; // Number of days in the given month eg. 28 through 31
case 'L': return ; // Whether it's a leap year eg. 1 if it is a leap year, 0 otherwise.
case 'o': return ; // ISO-8601 week-numbering year. This has the same value as Y, except that if the ISO week number (W) belongs to the previous or next year, that year is used instead. (added in PHP 5.1.0) eg. Examples: 1999 or 2003
case 'Y': return ; // A full numeric representation of a year, 4 digits eg. Examples: 1999 or 2003
case 'y': return ; // A two digit representation of a year eg. Examples: 99 or 03
// `time` related formats are missing!
case 'U': return ; // Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT) eg. See also time()
case 'quarter': return $this->month / 4 + 1;
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default:
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if ( ! ctype_upper($name))
$name = strtoupper($name);
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// MySQL related values:
switch (strtoupper($name))
{
case 'DAYNAME': // https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_dayname
case 'DAYOFWEEK':
case 'DAYOFMONTH':
case 'DAYOFYEAR':
//--- Start of alias or mixed-case properties ---//
case 'YEAR': return substr($this->str, 0, 4);
case 'MONTH': return substr($this->str, 5, 2);
case 'DAY': return substr($this->str, 8, 2);
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}
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$name = strtolower($name);
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if (self::$hashAlgos === null)
self::$hashAlgos = array_flip(hash_algos()); // set the hash algorithms as keys for faster lookup with isset() instead of in_array()!
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if (isset(self::$hashAlgos[$name])) // we converted the hash name to lowercase above so we can safely support this: $this->Sha256
return hash($name, $this->str);
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}
}
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public function getIterator()
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{
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return new \Twister\DateIterator($this->str);
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}
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public function getYear()
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{
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return substr($this->str, 0, 4);
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}
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public function getMonth()
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{
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return substr($this->str, 5, 2);
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}
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public function getDay()
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{
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return substr($this->str, 8, 2);
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}
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static function curdate($format = 'Y-m-d')
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{
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//static $curdate = new static(date('Y-m-d'));
//return $curdate;
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// alternative
return new static(date($format));
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}
/**
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* Returns true if the string contains a date in the format 'YYYY-MM-DD' AND is a valid Gregorian date