当我运行此代码时，计数器仅变为1和2，但我想使其变为5

Question

当我运行此php代码时，计数器变量仅变为1和2，但我想使其变为5，这是怎么回事，有人可以帮助我吗？为什么反剂量从2上升？

<?php
session_start();
include "sql.php";
$date = $_POST['date'];
$email = $_SESSION[email];
$counter = 0;
$check = " select * from reservations where date = '$date'";
$result = mysqli_query($con, $check);
$num = mysqli_num_rows($result);

if($num = 1){

    $data = " select * from reservations where date = '$date'";
    $dresult = mysqli_query($con, $data);
    $row = mysqli_fetch_array($dresult); 

    $counter = $row[counter];
    echo $counter;
    if ($counter < 5){

        $counter=$counter+1;
        $reg= "insert into reservations(date,counter,email) values('$date' , '$counter' , '$email')";
        mysqli_query($con, $reg);
    }

    else{

        echo "no tables available";
    }

}
else{

    $data = " select * from reservations where date = '$date'";
    $dresult = mysqli_query($con, $data);
    $row = mysqli_fetch_array($dresult);
    $counter = $row[counter];

    $counter=$counter+1;
    $reg= "insert into reservations(date,counter,email) values('$date' , '$counter' , '$email')";
    mysqli_query($con, $reg);
}   

Answer 1

我认为您应该将其循环播放。
检查下面的代码：

<?php
session_start();
include "sql.php";
$date = $_POST['date'];
$email = $_SESSION[email];
$counter = 0;
$check = " select * from reservations where date = '$date'";
$result = mysqli_query($con, $check);
$num = mysqli_num_rows($result);

if($num = 1){

    $data = " select * from reservations where date = '$date'";
    $dresult = mysqli_query($con, $data);
    $row = mysqli_fetch_array($dresult); 

    $counter = $row[counter];
    echo $counter;
    if ($counter < 5){
      while($counter <= 5){

        //$counter=$counter+1;
        $reg= "insert into reservations(date,counter,email) values('$date' , '$counter' , '$email')";
        mysqli_query($con, $reg);
       $counter++;

      }
    }

    else{

        echo "no tables available";
    }

}
else{

    $data = " select * from reservations where date = '$date'";
    $dresult = mysqli_query($con, $data);
    $row = mysqli_fetch_array($dresult);
    $counter = $row[counter];

    $counter=$counter+1;
    $reg= "insert into reservations(date,counter,email) values('$date' , '$counter' , '$email')";
    mysqli_query($con, $reg);
}