Online PHP editor | output for PFQ5d

@ 2019-03-13T09:56:20Z

<?php

// https://stackoverflow.com/questions/55137231
$cases =
[
    [[], false],
    [[1], false],
    [[1,2], false],
    [[1,3], true],
    [[1,2,3], false],
    [[1,2,4], true],
    [[2,3,5,6], true],
    [[2,5,6,8], false],
    [[3,6,10,16], false],
    [[5,7,8,9,10,11], true],
];

// Assuming zero indexed and sequential keys in array.
function missing_only_one_incremental_value_in_sequence(array $nums)
{
    $count     = count($nums);
    $seq_count = 0;
    for($i=1; $i<$count; $i++)
        if($nums[$i]==$nums[$i-1]+1)
            $seq_count++;

    return $seq_count == $count-2;
}

foreach($cases as $case) {
    echo implode(',', $case[0]);
    echo "\n";
    $result = missing_only_one_incremental_value_in_sequence($case[0]);
    var_dump($result);
    echo $result == $case[1] ? 'Pass' : 'Fail';
    echo "\n\n";
}

Output for 7.1.25 - 7.1.27, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0 - 8.5.1: bool(false) Pass 1 bool(false) Pass 1,2 bool(false) Pass 1,3 bool(true) Pass 1,2,3 bool(false) Pass 1,2,4 bool(true) Pass 2,3,5,6 bool(true) Pass 2,5,6,8 bool(false) Pass 3,6,10,16 bool(false) Pass 5,7,8,9,10,11 bool(true) Pass
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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