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@ 2014-06-30T00:17:26Z

<?php
function add_deadline($givenDate, $hours){ 
    $range = (ceil($hours/7)*120);
    $cnt=1;
    $goodhours = array();
    foreach(range(1,$range) as $num):
    
        $datetime = date("Y-m-d H:i:s", strtotime('+'.$num.' hour',strtotime($givenDate)));
        $time = date("Hi", strtotime('+'.$num.' hour',strtotime($givenDate)));
        $day = date("D", strtotime('+'.$num.' hour', strtotime($givenDate)));
        
        if($day != 'Sat' && $day != 'Sun' && $time >= 830 && $time <= 1730):
            $goodhours[$cnt] = $datetime;
             
            if($cnt >= $hours && array_key_exists($hours,$goodhours)):
                return $goodhours[$hours];
                break;
            endif;
            
            $cnt++;
        endif;
        
    endforeach;
}

//Pass in date and the hours to add on
$future = add_deadline('2014-06-27 08:30:00', '65');
echo $future;

Output for git.master, git.master_jit, rfc.property-hooks: 2014-07-07 13:30:00

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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