3v4l.org

run code in 300+ PHP versions simultaneously

@ 2017-03-13T16:29:52Z

<?php
$a = [1,2,3,4,13];

$nxt = $a[0];
    $cnt = count($a);
    $j = 0;
    $ret = [];
    
for ($i = 1; $i < $cnt; ++$i) {

        $pre = $nxt;
        $diff = $nxt;
            //        ---- WAIT LIKE AGES FOR $a[$i]
        $nxt = $a[$i];
        
        //$k = $a[$i + 1];

        //$diff = $nxt - $pre; // MOV diff,nxt SUB diff,pre LATENCY: 2
        //$diff = $pre - $nxt;
        $diff -= $nxt;
        $ret[$j++] = $pre;
        
        // branch
        if ($diff == -1) { // raising range
            do {
                ++$nxt;
                ++$i;
            } while ($a[$i] == $nxt);
            $ret[$j] = "$pre-" . ($nxt - 1);
            $nxt = $a[$i];
        } elseif ($diff == 1) { // found falling range
            ++$i;

            while ($a[$i] == --$nxt) { // search end of range
                ++$i;
            }
            $ret[$j] = "$pre-" . ($nxt + 1);
            $nxt = $a[$i];
        }

    }

Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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
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

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238.78 ms | 402 KiB | 291 Q