Online PHP editor | output for eWPLf

@ 2019-02-14T13:06:49Z

<?php

$n = 2147483647;
shift($n);
echo "\n";
echo "\n";
echo "\n";
echo "\n";
$n = 2147483648;
shift($n);

function out($a, $b, $c, $b2 = '0', $c1 = ' ') {
    $padstra = 40;
    $padstrb = 23;
    echo 
        str_pad($a, $padstra, ' ', STR_PAD_LEFT) 
      . " " 
      . str_pad(decbin($b), 32, $b2, STR_PAD_LEFT) 
      . " " 
      . str_pad($c, $padstrb, $c1) . "\n";
}

function shift($n) {
    out($n    , $n , '$n'   );
    echo "\n";
    out('A:', $n >> 1 , '$n >> 1'   );
    out('B:', 0xFFFFFFFF , '0xFFFFFFFF'   );
    out('A & B:', ($n >> 1) & 0xFFFFFFFF , '($n >> 1) & 0xFFFFFFFF'   );
    echo "\n";
    out('C:', $n , '$n'   );
    out('D:', 0x00000001 , '0x00000001'   );
    out('C & D:', $n & 0x00000001 , '$n & 0x00000001'   );
    echo "\n";
    out('C & D:', $n & 0x00000001 , '$n & 0x00000001'   );
    out('(C & D) << 31:', ($n & 0x00000001) << 31 , '($n & 0x00000001) << 31'   );
    echo "\n";
    out('A & B:', ($n >> 1) & 0xFFFFFFFF , '($n >> 1) & 0xFFFFFFFF'   );
    out('(C & D) << 31:', ($n & 0x00000001) << 31 , '($n & 0x00000001) << 31'   );
    out('(A & B) | ((C & D) << 31):', ($n >> 1) & 0xFFFFFFFF | ($n & 0x00000001) << 31 , '($n >> 1) & 0xFFFFFFFF | ($n & 0x00000001) << 31');
}

Output for 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14: 2147483647 01111111111111111111111111111111 $n A: 00111111111111111111111111111111 $n >> 1 B: 11111111111111111111111111111111 0xFFFFFFFF A & B: 00111111111111111111111111111111 ($n >> 1) & 0xFFFFFFFF C: 01111111111111111111111111111111 $n D: 00000000000000000000000000000001 0x00000001 C & D: 00000000000000000000000000000001 $n & 0x00000001 C & D: 00000000000000000000000000000001 $n & 0x00000001 (C & D) << 31: 10000000000000000000000000000000 ($n & 0x00000001) << 31 A & B: 00111111111111111111111111111111 ($n >> 1) & 0xFFFFFFFF (C & D) << 31: 10000000000000000000000000000000 ($n & 0x00000001) << 31 (A & B) | ((C & D) << 31): 10111111111111111111111111111111 ($n >> 1) & 0xFFFFFFFF | ($n & 0x00000001) << 31 2147483648 10000000000000000000000000000000 $n A: 01000000000000000000000000000000 $n >> 1 B: 11111111111111111111111111111111 0xFFFFFFFF A & B: 01000000000000000000000000000000 ($n >> 1) & 0xFFFFFFFF C: 10000000000000000000000000000000 $n D: 00000000000000000000000000000001 0x00000001 C & D: 00000000000000000000000000000000 $n & 0x00000001 C & D: 00000000000000000000000000000000 $n & 0x00000001 (C & D) << 31: 00000000000000000000000000000000 ($n & 0x00000001) << 31 A & B: 01000000000000000000000000000000 ($n >> 1) & 0xFFFFFFFF (C & D) << 31: 00000000000000000000000000000000 ($n & 0x00000001) << 31 (A & B) | ((C & D) << 31): 01000000000000000000000000000000 ($n >> 1) & 0xFFFFFFFF | ($n & 0x00000001) << 31

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