如果无法正常工作，则使用其他倍数PHP

Question

I'm having an issue with a login script. The rest of it works fine, but there is something odd happening here. The issue is that even though $IPCHK is returning true the elseif function does not execute. It only executes when I set $IPCHK to jibberish. Any help would be great. Thanks in advance

if ($Numrows == 0)
{
    if ($Fail >= 3)
    {
        $Connection = connectToDb();
        //return true, false,pending
        $IPCHK = checkIP();
        $IPCHK = true; //forcing it to be true and still broke
        //If no ip id there
        if($IPCHK == false)
        {
            $IP = getIP();
            $Query = "INSERT INTO ip VALUES ('','$IP',Now())";
            mysqli_query($Connection, $Query)
                or die(error(mysqli_error($Connection)));
            echo "You have failed to login too many times";
            echo "<br />Please <a href='login.php'>try again</a> later.";
            $Lock = true;
        }
        //If ip is there but timer is not up
        elseif ($IPCHK == 'pending')
        {
            echo "You have failed to login too many times";
            echo "<br />Please <a href='login.php'>try again</a> later.";
            $Lock = true;
        }
        //Timers Up
        elseif ($IPCHK == true) //here does not execute when it returns true
        {
            $_SESSION['FailedLogin'] = 0;
            $Lock = false;
        }
        else
        {
            error("End of if check");
        }
    }
    else
    {
        $Fail = 3 - $Fail;
        $_SESSION['FailedLogin'] = $_SESSION['FailedLogin'] + 1;
        $Error = $Error."<br />You have ".$Fail." attempts remaining";
    }
}

Answer 1

In your Condition you have

 elseif ($IPCHK == 'pending')

then

elseif ($IPCHK == true)

the second else will never execute because $IPCHK == 'pending' means also that $IPCHK == true if you want to execute your second else you have to change the seconde condition to somethig like this

elseif($IPCHK == 'done')

or simply use === like this

elseif($IPCHK === 'pending')

then

elseif($IPCHK === true)

Answer 2

Lamari Alaa is correct, and the relevant documentation entry on type juggling can help understand why.

The following script outputs: boolean = string :

$test = true;

if( $test == 'pending' ) {
    echo 'boolean = string';
} else if ( $test ) {
   echo 'boolean != string';
}

This is because the string 'pending' is being coerced into a boolean value before being compared to the boolean value true. Since it evaluates as true, the first condition is taken. Consider replacing == 'pending' to === 'pending'