PHP - 对象循环条件

Question

我有这个对象：

$boosts = array(
    "2x12" => 500,
    "2x24" => 800,
    "2x7d" => 4500,
    "3x12" => 700,
    "3x24" => 1300,
    "3x7d" => 6500
);

然后是一个变量：$type = "2x12";我想要做的是检查$ boost中是否存在变量$ type。我尝试了很多代码，但我无法得到它。

foreach ($boosts as $savedTypes) {
    echo json_encode($savedTypes) . "|";
    if ($boosts[$type] === $type) {
        echo "VALID";
    }
}

Answer 1

foreach ($boosts as $key=>$value) {  
   if ($key === $type) {
    echo "VALID";
   }
 }

希望对你有帮助

Answer 2

除非我遗漏了某些东西，否则你应该能够在这种情况下使用array_key_exists

$boosts = array(
    "2x12" => 500,
    "2x24" => 800,
    "2x7d" => 4500,
    "3x12" => 700,
    "3x24" => 1300,
    "3x7d" => 6500
);
$type='2x12';
$valid=array_key_exists( $type, $boosts );
echo $valid ? 'VALID' : 'INVALID';