php - 将变量与多个数组匹配

Question

假设我有随机 $variable 和三个数组：

$array1 = ("one", "two", "three");
$array2 = ("four", "five", "six");
$array3 = ("seven", "eight", "nine");

这个怎么做：

if $variable is in $array1
echo "in array one";
elseif $variable is $array2
echo "in array two";
elseif $variable is in $array3
echo "in array three";
else
echo "variable isnt in any of arrays";

我希望你明白这一点，我真的很感激任何帮助，我正在考虑一个一个地搜索数组中的项目，然后 preg_matching 它们。但我不知道如何用多个数组来做到这一点:)

Answer 1

您可以使用该in_array()功能。[文档]

您的代码如下所示：

if (in_array ($variable, $array1)) {
 echo "in array 1";
} else if(in_array ($variable, $array2)) {
 echo "in array 2";
} [...] else {
 echo "isnt in any";
}

Answer 2

您需要使用，请参阅此处in_array的手册

  if (in_array($variable, $array1))
   echo "in array one";
  else if (in_array($variable, $array2))
    echo "in array two";
  else if (in_array($variable, $array3))
    echo "in array three";
  else
    echo "variable isnt in any of arrays";