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@ 2022-08-29T21:07:12Z

<?php

define(
    'PAIRS',
    [
        [
            'mon,tue',
            'tue,wed',
            'wed,thu',
            'thu,fri',
            'fri,sat',
            'sat,sun'
        ],
        [
            'mon-tue',
            'tue-wed',
            'wed-thu',
            'thu-fri',
            'fri-sat',
            'sat-sun'
        ]
    ]
);

function condenseDays(string $days): string
{
    return preg_replace(
               '/-\K[^,]+-/',
               '',
               str_replace(PAIRS[0], PAIRS[1], $days)
           );
}
echo condenseDays('mon,tue,wed,thu,fri,sat') . "\n";
echo condenseDays('tue,thu,fri,sun') . "\n";
echo condenseDays('mon,tue,wed,fri,sat,sun') . "\n";
echo condenseDays('mon,thu,sun') . "\n";
echo condenseDays('tue,wed,fri,sat') . "\n";
echo condenseDays('mon,wed,fri,sun') . "\n";
echo condenseDays('mon,tue,thu,fri,sat,sun');

Output for git.master, git.master_jit, rfc.property-hooks: mon-sat tue,thu-fri,sun mon-wed,fri-sun mon,thu,sun tue-wed,fri-sat mon,wed,fri,sun mon-tue,thu-sun

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Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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