Spot my PHP 7 bug/warning

Line 21 and line 43 of this function cause a PHP 7.2 warning of : A non-numeric value encountered. Please rewrite these 2 lines to eliminate the warnings that are filling up my error_logs. ( It is the lines containing the operator & )

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function seedMT($seed,$min,$max) {

// The 624 element array used to get random numbers.

static $mt = array();

// The previous SEED.

static $previousSeed = null;

// The index used when selecting a number to randomize.

static $indexRand = 0;

// This Regenerate when reseeding or seeding initially

if ($seed !== null && $seed !== $previousSeed) {

$mt = array(&$seed, 624 => &$seed);

$previousSeed = $seed;

for ($i = 1; $i < 624; ++$i) {

$mt[$i] = (0x6c078965 * ($mt[$i - 1] ^ ($mt[$i - 1] >> 30)) + $i) & 0xffffffff;

}

}

// Every 624 numbers we regenerate

if ($indexRand == 0) {

// This has been tweaked for maximum speed and elegance

// Explanation of possibly confusing variables:

// $p = previous index

// $sp = split parts of array - the numbers at which to stop and continue on

// $n = number to iterate to - we loop up to 227 adding 397 after which we finish looping up to 624

// subtracting 227 to continue getting out 397 indices ahead reference

// $m = 397 or -227 to add to $i to keep our 397 index difference

// $i = the previous element in $sp, our starting index in this iteration

for ($j = 1, $sp = array(0, 227, 397); $j < count($sp); ++$j) {

for ($p = $j - 1, $i = $sp[$p], $m = ((624 - $sp[$j]) * ($p ? -1 : 1)), $n = ($sp[$j] + $sp[$p]); $i < $n; ++$i) {

$y = ($mt[$i] & 0x80000000) + ($mt[$i + 1] & 0x7fffffff);

$mt[$i] = $mt[$i + $m] ^ (($y & 0x1) * 0x9908b0df);

}

}

}

// This selects a number from the array and randomizes it.

$y = $mt[$indexRand];

$y ^= $y >> 11;

$y ^= ($y << 7) & 0x9d2c5680;

$y ^= ($y << 15) & 0xefc60000;

$y ^= $y >> 18;

// The index is incremented so we will be able to get a different random number without changing the seed.

$indexRand++;

if ($indexRand == 624) $indexRand = 0;

return $y % ($max - $min + 1) + $min;

}

PHP

ID do Projeto: #22271162

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