Online PHP editor | output for sSFpu

@ 2022-06-01T08:16:06Z

<?php

$data = <<<JSON
[
    {
        "department": "CIS",
        "name": "Intro to CIS",
        "sections": [
            {
                "sectionNumber": "01",
                "regNum": "012345",
                "days": "MWF",
                "startTime": "900",
                "endTime": "1030",
                "labDay": "M",
                "labStartTime": "1300",
                "labEndTime": "1500"
            },
            {
                "sectionNumber": "02",
                "regNum": "098304",
                "days": "TR",
                "startTime": "1300",
                "endTime": "1500",
                "labDay": "",
                "labStartTime": "",
                "labEndTime": ""
            }
        ]
    },
    {
        "department": "MATH",
        "name": "Intro to MATH",
        "sections": [
            {
                "sectionNumber": "01",
                "regNum": "012345",
                "days": "MWF",
                "startTime": "900",
                "endTime": "1030",
                "labDay": "M",
                "labStartTime": "1300",
                "labEndTime": "1500"
            },
            {
                "sectionNumber": "02",
                "regNum": "098304",
                "days": "TR",
                "startTime": "1300",
                "endTime": "1500",
                "labDay": "",
                "labStartTime": "",
                "labEndTime": ""
            }
        ]
    }
]
JSON;

$jsonArrayEntry = json_decode($data, true);

function crossProduct() {
    $_ = func_get_args();
    if (count($_) == 0) {
        return array(array());
    }                
    $a = array_shift($_);         
    $c = call_user_func_array('crossProduct', $_);        
    $r = array();
    foreach ($a as $v) {
        foreach ($c as $p) {
            $r[] = array_merge(array($v), $p);
        }
    }
    return $r;
}

$allDepartmentsSections = [];
foreach ($jsonArrayEntry as $entry) {
        $sections = [];
        foreach ($entry["sections"] as $section) {
              $sections[] = $section + [ "department" => $entry["department"], "name"=>$entry["name"] ];
        } 
        $allDepartmentsSections[] = $sections;
}

print_r(call_user_func_array('crossProduct', $allDepartmentsSections));

Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12: Array ( [0] => Array ( [0] => Array ( [sectionNumber] => 01 [regNum] => 012345 [days] => MWF [startTime] => 900 [endTime] => 1030 [labDay] => M [labStartTime] => 1300 [labEndTime] => 1500 [department] => CIS [name] => Intro to CIS ) [1] => Array ( [sectionNumber] => 01 [regNum] => 012345 [days] => MWF [startTime] => 900 [endTime] => 1030 [labDay] => M [labStartTime] => 1300 [labEndTime] => 1500 [department] => MATH [name] => Intro to MATH ) ) [1] => Array ( [0] => Array ( [sectionNumber] => 01 [regNum] => 012345 [days] => MWF [startTime] => 900 [endTime] => 1030 [labDay] => M [labStartTime] => 1300 [labEndTime] => 1500 [department] => CIS [name] => Intro to CIS ) [1] => Array ( [sectionNumber] => 02 [regNum] => 098304 [days] => TR [startTime] => 1300 [endTime] => 1500 [labDay] => [labStartTime] => [labEndTime] => [department] => MATH [name] => Intro to MATH ) ) [2] => Array ( [0] => Array ( [sectionNumber] => 02 [regNum] => 098304 [days] => TR [startTime] => 1300 [endTime] => 1500 [labDay] => [labStartTime] => [labEndTime] => [department] => CIS [name] => Intro to CIS ) [1] => Array ( [sectionNumber] => 01 [regNum] => 012345 [days] => MWF [startTime] => 900 [endTime] => 1030 [labDay] => M [labStartTime] => 1300 [labEndTime] => 1500 [department] => MATH [name] => Intro to MATH ) ) [3] => Array ( [0] => Array ( [sectionNumber] => 02 [regNum] => 098304 [days] => TR [startTime] => 1300 [endTime] => 1500 [labDay] => [labStartTime] => [labEndTime] => [department] => CIS [name] => Intro to CIS ) [1] => Array ( [sectionNumber] => 02 [regNum] => 098304 [days] => TR [startTime] => 1300 [endTime] => 1500 [labDay] => [labStartTime] => [labEndTime] => [department] => MATH [name] => Intro to MATH ) ) )

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