Online PHP editor | output for stSem

@ 2016-02-10T01:47:17Z

<?php
/*  convert 64-bit numeric string to decimal 
 */
function showDecimal( $bin, $base ) {
    if ($bin[0] == 'F' && $bin[1] == 'F'){
        $bin = substr($bin,1);        // trim string so may
    }
    $num = intval( $bin, $base );     // convert to binary number
    
    $num &= 0xffff;                   // using only rightmost 16 bits
    if ( 0x8000 & $num ) {            // true if $num is negative ...
      $num =( $num - (2 ** 16)  ); 
      $num2 = -((2 ** 16) - 0xfffd);
      var_dump($num2);
    }
    
    return $num;
}
$c = "FFFFFFFFFFFFFFFD";              //  TC in hexadecimal for:
echo showDecimal($c,16),"\n";          // -3

Output for 5.6.8 - 5.6.21, 7.0.0 - 7.0.20, 7.1.0 - 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: int(-3) -3
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 int(-3) -3
Output for 5.5.24 - 5.5.35: Parse error: syntax error, unexpected '*' in /in/stSem on line 12
Process exited with code 255.

preferences:dark modelive preview