Question

所以我有一个名为bestmatchrule的变量，它在1-25之间返回一个数字，现在我试图使用以下if语句为该数字赋一个名称：

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问题是它不起作用。它只返回前一个。这是返回值或if语句的问题吗？

另外，如果有缩短它的方法使它看起来更好吗？我更专注于功能，但必须有比这更好的方法吗？

提前致谢！（p.s.对于noob问题抱歉！）

Answer 1

$a == "1" || "2"不是有效的声明。它需要$a == "1" || "$a == 2"。那是你的错误。

就缩短这一点而言，你无能为力。你可以使用in_array()来缩短某些陈述，但你真的没有任何真正方便的地方。

if ($a == "1" || $a == "2") {
      $b="Chesil House";
} elseif ($a == "3" || $a == "4") {
      $b="Corfe House";
} elseif ($a == "5" || $a == "6") {
      $b="Cranborne House";
} elseif ($a == "7" || $a == "8") {
        $b="Dorchester House";
} elseif ($a == "9" || $a == "10") {
      $b="Lyme Regis House";
} elseif ($a == "11" || $a == "12") {
      $b="Okeford House";
} elseif ($a == "13" || $a == "14") {
      $b="Purbeck House";
} elseif ($a == "15" || $a == "16") {
      $b="Student Village";
} elseif (in_array($a, array("17", "18","19")) {
      $b="Unilet";
} elseif ($a == "20") {
      $b="Conel Court";
} elseif ($a == "21" || $a == "22") {
      $b="St John's Road";
} elseif (in_array($a, array("23", "24", "25")) {
      $b="Private Let";
} else {
     echo "Please Try Again";
}

您还可以使用数组来保存您的值，$a值是关键。然后检查它是否在数组中，如果是，则分配值：

$array = [
    1 => "Chesil House",
    2 => "Chesil House",
    3 => "Corfe House",
    4 => "Corfe House",
    5 => "Cranborne House",
    6 => "Cranborne House",
    7 => "Dorchester House",
    8 => "Dorchester House",
    9 => "Lyme Regis House",
    10 => "Lyme Regis House",
    11 => "Okeford House",
    12 => "Okeford House",
    13 => "Purbeck House",
    14 => "Purbeck House",
    15 => "Student Village",
    16 => "Student Village",
    17 => "Unilet",
    18 => "Unilet",
    19 => "Unilet",
    20 => "Conel Court",
    21 => "St John's Road",
    22 => "St John's Road",
    23 => "Private Let",
    24 => "Private Let",
    25 => "Private Let"
];

if (isset($array[$a])) {
    $b = $array[$a];
}
else {
    echo "Please Try Again";
}

Answer 2

John Conde的回答可能就是你想要的。另一种可能性是渐进式小于（＆lt;）陈述。

$a= (int) $bestmatchrule;
$b='';

if ($a < 3) {
      $b="Chesil House";
} elseif ($a < 5) {
      $b="Corfe House";
} elseif ($a < 7) {
      $b="Cranborne House";
} elseif ($a < 9) {
        $b="Dorchester House";
} elseif ($a < 11) {
      $b="Lyme Regis House";
} elseif ($a < 13) {
      $b="Okeford House";
} elseif ($a < 15) {
      $b="Purbeck House";
} elseif ($a < 17) {
      $b="Student Village";
} elseif ($a < 20) {
      $b="Unilet";
} elseif ($a < 21) {
      $b="Conel Court";
} elseif ($a < 23) {
      $b="St John's Road";
} elseif ($a < 26) {
      $b="Private Let";
} else {
     "Please Try Again";
}

switch语句也是一种选择，但我认为它不会更好。

如何压缩if语句代码？

2 个答案: