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@ 2013-12-11T11:55:51Z

<?php
$start_date    = new DateTime( '2013-01-01 00:00:00' );
$end_date      = new DateTime( '2013-12-31 23:59:59' );
$end_date_ts   = $end_date->getTimestamp();
$now           = new DateTime( '2013-12-10 15:45:34' );
$now_ts        = $now->getTimestamp();
$interval      = new DateInterval( 'P1W' );
$periods        = new DatePeriod( $start_date, $interval, $end_date );

/** @var \DateTime $period */
foreach($periods as $period){
    $periodEnd = clone $period;
    $periodEnd->add($interval);
    if($period < $now && $now < $periodEnd){
        $result = iterator_to_array(new \DatePeriod($period, $interval, $periodEnd->add($interval)));
        $int_start_date = $result[0];
        $int_end_date = $result[1];
    }
}

var_dump( $int_start_date->format( 'Y-m-d H:i:s' ) );
var_dump( $int_end_date->format( 'Y-m-d H:i:s' ) );

Output for git.master, git.master_jit, rfc.property-hooks: string(19) "2013-12-10 00:00:00" string(19) "2013-12-17 00:00:00"

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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