Online PHP editor | output for uR8JG

@ 2018-12-10T22:03:28Z

<?php

function contains($start, $end, $check) {
    return $check > $start && $check < $end;
}

function overlap($a, $b) {
    return contains($a[0], $a[1], $b[0]) || contains($a[0], $a[1], $b[1]);
}

function checkListForOverlaps($list) {
    for($i=0,$c=count($list); $i<$c; ++$i) {
        for($j=$i+1; $j<$c; ++$j) {
            if( overlap($list[$i], $list[$j]) ) {
                printf("%s and %s overlap\n", json_encode($list[$i]), json_encode($list[$j]));
            }
        }
    }
}

$input = [[1, 3],[3, 7],[9,INF], [2, 5]];
checkListForOverlaps($input);

Output for 5.6.38, 7.0.33, 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: [1,3] and [2,5] overlap [3,7] and [2,5] overlap
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 [1,3] and [2,5] overlap [3,7] and [2,5] overlap

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