php - 检查 boolean 值是真还是假

Question

我有一小部分代码:

$company = array('relation' => $_SESSION['username']);
$companyresponse = $wcfclient->GetCompany($company);
    foreach ($companyresponse->GetCompanyResult as $key => $value){
    echo $value[0]; //This is the name of the company

    if ($value[1] == TRUE){
       echo "Company blocked";
    }
    elseif($value[1] == FALSE){
       echo "Company NOT blocked";
    }
    echo $value[1]; //This gives me the correct result, in this case: FALSE

$value[1] 的结果是 FALSE，但是当它通过我的 if 语句时它返回:“Company blocked”，所以 $value[1] 是 TRUE 而它需要是 FALSE。

有人能告诉我为什么它没有返回正确的值吗？

我也试过了:

if ($value[1] == 1){
   echo "Company blocked";
}
else{
   echo "Company NOT blocked";
}

这给了我 FALSE 的值，但是 if 语句以某种方式将其更改为 TRUE。

var_dump($value[1]) 

当我尝试一家正常被封锁的公司时，它给了我正确的结果:
string(4) "True" Company blockedTrue

Answer 1

$value的类型1是“字符串”而不是“boolean ”。

When converting to boolean, the following values are considered FALSE:

the boolean FALSE itself
the integer 0 (zero)
the float 0.0 (zero)
the empty string, and the string "0"
an array with zero elements
an object with zero member variables (PHP 4 only)
the special type NULL (including unset variables)
SimpleXML objects created from empty tags

Every other value is considered TRUE (including any resource).

引用: Converting to boolean (PHP Manual)

所以， “假” == 真 !

也许您可以将它们作为字符串进行比较:

if(strtoupper($value[1]) == "TRUE"){
    //...
}else{
    //...
}