如果/開關 - 「如果是$ var是 'A' 或 'B' 或」C「 等

Question

可能重複：
PHP make if shorter

我有一個if聲明看起來像這樣：

if($variable == "one" || $variable == "two" || $variable == "three" || $variable == "four"){ 
    // do something 
} 
else { 
    // do something else 
} 

問題是，它變得相當沉重..它將是大約20或30個不同的選項。

無論如何，我可以用少代碼做到這一點？ EG：

if($variable == ("one" || "two" || "three" || "four" || "five"))..

Answer 1

switch ($variable) { 
case "one": 
case "two": 
case "three": 
case "four": 
    // do something 
    break; 
default: 
    // do something else 
} 

OR

$testSeries = array("one","two","three","four"); 
if (in_array($variable,$testSeries)) { 
    // do something 
} 
else { 
    // do something else 
} 

Answer 2

想到的最簡單的事情是爲你創建一個這樣的數組：

$options = array("one" , "two" , "three" , "four" , "five"); 
if(in_array($variable , $options)){ 

}else{ 

} 

Answer 3

switch ($i) { 
case "one": 
case "two": 
case "three": 
. 
. 
. 
//Code here 
break; 
} 

Answer 4

if (preg_match('/^(one|two|three|four|five)$/', $var)) { 
    // Do stuff 
}