3v4l.org

run code in 300+ PHP versions simultaneously

@ 2013-06-26T23:29:21Z

<?php

    function createCompressedString($shorts)
    {
        $compressLen = $compressPos = $currentLen = $currentPos = 0;
        $inBlock = false;
        
        for ($i = 0; $i < 8; $i++) {
            if ($shorts[$i] === 0) {
                if (!$inBlock) {
                    $inBlock = true;
                    $currentPos = $i;
                }

                $currentLen++;
            } else if ($inBlock) {
                if ($currentLen > $compressLen) {
                    $compressLen = $currentLen;
                    $compressPos = $currentPos;
                }

                $inBlock = false;
                $currentPos = $currentLen = 0;
            }
        }
        if ($inBlock) {
            $compressLen = $currentLen;
            $compressPos = $currentPos;
        }

        if ($compressLen === 8) {
            return '::';
        }

        if ($compressLen > 1) {
            array_splice($shorts, $compressPos, $compressLen, ['', '']);
        }

        return implode(':', array_map(function($short) {
            return $short === '' ? '' : dechex($short);
        }, $shorts));
    }

var_dump(createCompressedString([1, 0, 0, 0, 1, 2001, 23234, 21]));

Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 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 - 8.3.6: string(17) "1:::1:7d1:5ac2:15"
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[' in /in/oFNhD on line 36
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5: Parse error: parse error, unexpected '[' in /in/oFNhD on line 36
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/oFNhD on line 36
Process exited with code 255.

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