output

vs.php >
{ "x": 124585765, "y": 360809637, "z":521680731, "w": 406819} // sebelum for
{ "x": 171306982, "y": 636562185, "z": 2144330573, "w": 1121150324} // sesudah for

vs.js >
{ x: 124585765, y: 360809637, z: 521680731, w: 406819 } // sebelum for
{ x: 4422676, y: 513300356, z: -1713666090, w: 1902687725 } // sesudah for

kenapa ya kok output setelah for block berbeda?

vs.js

const process = require('process')

var a,b,c,xors;
var textpattern = 'Angger Rafi Akbar';

function rand() {
    var t = xors.x ^ (xors.x << 11);
    xors.x = xors.y;
    xors.y = xors.z;
    xors.z = xors.w;
    xors.w = (xors.w ^ (xors.w >>> 19)) ^ (t ^ (t >>> 8));
    //return xors.w / 4294967296 + 0.5;
  }

a = textpattern;
c = [123456789, 362436069, 521288629, 0];

for (b = 0; b < a.length; b++) {
    c[(b + 3) % 4] ^= (a.charCodeAt(b) << ((b * 11) % 16));
}

xors = {
    x: c[0],
    y: c[1],
    z: c[2],
    w: c[3]
  };

console.log(xors)
for (a=0; a < 52; a++) rand();
console.log(xors)

vs.php

<?php

/*
    zero fill right shift polyfill
    https://stackoverflow.com/a/43359819
*/
function zeroShift($a, $b) {
    if ($b >= 32 || $b < -32) {
        $m = (int)($b/32);
        $b = $b-($m*32);
    }

    if ($b < 0) {
        $b = 32 + $b;
    }

    if ($b == 0) {
        return (($a>>1)&0x7fffffff)*2+(($a>>$b)&1);
    }

    if ($a < 0) 
    { 
        $a = ($a >> 1); 
        $a &= 0x7fffffff; 
        $a |= 0x40000000; 
        $a = ($a >> ($b - 1)); 
    } else { 
        $a = ($a >> $b); 
    } 
    return $a; 
}

function shift_left_32( $a, $b ) {
    return ($c = $a << $b ) && $c >= 0x7FFFFFFF ? ($c & 0x7FFFFFFF) : $c;
}

function is64($number) {
    if ($number >= 0x7FFFFFFF) {
        return '64bit';
    } else {
        return '32bit';
    }

}
function randd(&$xors) {
    $t = $xors['x'] ^ (shift_left_32($xors['x'], 11));
    $xors['x'] = $xors['y'];
    $xors['y'] = $xors['z'];
    $xors['z'] = $xors['w'];
    
    $xors['w'] = ($xors['w'] ^ (zeroShift($xors['w'], 19))) ^ ($t ^ (zeroShift($t, 8)));
    /*
    echo sprintf("X: %d (%s)\nY: %d (%s)\nZ: %d (%s)\nW: %d (%s)\n\n", 
    $xors['x'], is64($xors['x']),
    $xors['y'], is64($xors['y']),
    $xors['z'], is64($xors['z']),
    $xors['w'], is64($xors['w'])
    ); */
}

$textpattern = 'Angger Rafi Akbar';
$b = '';
$c = '';

$a = $textpattern;
$c = [123456789, 362436069, 521288629, 0];

for ($b = 0; $b < strlen($a); $b++) {
    $c[($b + 3) % 4] ^= (mb_ord($a[$b]) << (($b * 11) % 16));
}

$xors = [
    'x' => $c[0],
    'y' => $c[1],
    'z' => $c[2],
    'w' => $c[3]
];

echo json_encode($xors); // sebelum for
for ($a = 0; $a < 52; $a++) randd($xors);
echo json_encode($xors); // sesudah for