Online PHP editor | output for 8uEGr

<?php function interleave($students, $lessons) { $numStudents = count($students); $numLessons = count($lessons); if ( $numLessons >= $numStudents ) { $studentSliceSize = 1; $lessonSliceSize = intdiv($numLessons, $numStudents); } else { $studentSliceSize = intdiv($numStudents, $numLessons); $lessonSliceSize = 1; } $combinedArray = []; $nextStudent = 0; $nextLesson = 0; while ( $nextStudent < $numStudents || $nextLesson < $numLessons ) { $studentSlice = array_slice($students, $nextStudent, $studentSliceSize); array_push($combinedArray, ...$studentSlice); $nextStudent += $studentSliceSize; $lessonSlice = array_slice($lessons, $nextLesson, $lessonSliceSize); array_push($combinedArray, ...$lessonSlice); $nextLesson += $lessonSliceSize; } return $combinedArray; } var_dump(interleave(['John'], ['Maths'])); var_dump(interleave(['John'], ['Maths', 'Science'])); var_dump(interleave(['John', 'Mary'], ['Maths', 'Science'])); var_dump(interleave(['John', 'Mary', 'Sarah'], ['Maths', 'Science'])); var_dump(interleave(['John', 'Mary', 'Sarah', 'David'], ['Maths', 'Science'])); var_dump(interleave(['John', 'Mary', 'Sarah', 'David', 'Tim'], ['Maths', 'Science'])); var_dump(interleave(['John', 'Mary'], ['Maths', 'Science', 'Music'])); var_dump(interleave(['John', 'Mary'], ['Maths', 'Science', 'Music', 'English']));