某些行不計入foreach循環

Question

我從9xx項目的數據庫中獲得價格。 我添加此顯示項目頁面。使用Foreach $ rows = $ row。 vprice是我sellingprice和dprice是我dealerprice

$commisionrate = 30; 
$commisionfee = 100; 
$fee = $row['dprice'] + $commisionfee;//+100 
$x = $row['dprice']; 
$y = $x * $commisionrate/100; 
$z = $x + $y; 
$rate = $z;//(100*30%)+100 
if (($rate > $row['vprice']) && ($fee < $row['vprice'])){ 
    echo $fee; 
}elseif (($fee > $row['vprice']) && ($rate < $row['vprice'])){ 
    echo $rate; 
}elseif ($row['dprice']=$row['vprice']){ 
    echo $row['dprice']; 
} 

，當我重新檢查所有，我發現$row['dprice']幾個項目不計，並仍然受到舊價格顯示。實例是假的：我發現vprice爲188計算後80 dprice應該是104，但不改變與仍留在80

Answer 1

$commisionrate = 30; 
$commisionfee = 100; 
$fee = $row['dprice'] + $commisionfee;//+100 
$x = $row['dprice']; 
$y = $x * $commisionrate/100; 
$rate = $x + $y; 

// You don't need to put nested brackets, it very simple condition  
if ($rate > $row['vprice'] && $fee < $row['vprice']){ 
    echo "fee: " . $fee; //add some hint words, so you know which condition fires 

// You don't need to put nested brackets, it very simple condition 
} elseif ($fee > $row['vprice'] && $rate < $row['vprice']) { 
    echo "rate: " . echo $rate; 

// USE double `==`, because when single `=` used, the condition always returns true and you're confused by your result 
} elseif ($row['dprice'] == $row['vprice']) { 
    echo "row[\'dprice\']: " . $row['dprice']; 

// add last else 
} else { 
    // this is helpful for debugging of your possible output, regardless you are awaiting some output here 
}