php - while loop, if statement error -

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for reason when using code gives me white screen, , can't find problem in it?

while ($monsterhp > 0 && $yourhp > 0) {  if ($pokemon4['speed'] => $row['speed']) {  $monsterhp = floor($monsterhp - $mydmg);  if($yourhp > 0) { $yourhp = floor($yourhp - $monsterdmg); }  }elseif ($pokemon4['speed'] < $row['speed']) {  $yourhp = floor($yourhp - $monsterdmg);  if ($monsterhp > 0) { $monsterhp = floor($monsterhp - $mydmg); }  } }

you had error in operator: => (greater or equal)

it should this: >=


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