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@ 2024-05-05T11:51:25Z

<?php

$officialGrid = [
    ['grid' => TRUE, 'time' => '08:00', 'content' => NULL],
    ['grid' => TRUE, 'time' => '09:00', 'content' => NULL]
];

$bookings = [
    ['grid' => NULL, 'time' => '08:00', 'content' => 'Paul Simon'],
    ['grid' => NULL, 'time' => '08:00', 'content' => 'Art Garfunkel'],
    ['grid' => NULL, 'time' => '08:39', 'content' => 'Homer J. Simpson']
];

$timeSlotsToDisplay = $officialGrid;

array_map(function($el) use(&$timeSlotsToDisplay, $officialGrid) {
   $timeSlotsToDisplay[$el['time']] = array(
     'content' => 
       (isset($timeSlotsToDisplay[$el['time']]) ?
        trim($timeSlotsToDisplay[$el['time']]['content'], ',') . ',' : '') .
       $el['content'],
     'grid' => isset($officialGrid[$el['time']]) ? true : null
   );
}, $bookings);

ksort($timeSlotsToDisplay);
var_export($timeSlotsToDisplay);

Output for git.master, git.master_jit, rfc.property-hooks: array ( 0 => array ( 'grid' => true, 'time' => '08:00', 'content' => NULL, ), '08:00' => array ( 'content' => 'Paul Simon,Art Garfunkel', 'grid' => NULL, ), '08:39' => array ( 'content' => 'Homer J. Simpson', 'grid' => NULL, ), 1 => array ( 'grid' => true, 'time' => '09:00', 'content' => NULL, ), )

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2022-12-01 RFC: Property hooks - included in PHP 8.4
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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