如何插入

Question

我想查询数据库，以检查是否为当前计划的标记在数据库已经被更新插入之前，我的代码如下之前查询数据库：

<?php 
include 'config.php'; 
if(isset($_POST['submit'])){ 
    $schedule = $_POST['hischedule']; 
    $array = $_POST['marks']; 
    //Qry to check Duplicate values Againest Database 
    $marksupdqry = "select distinct scheduleName from marks"; 
    $mks = mysqli_query($link, $marksupdqry); 
    while($mksresult = mysqli_fetch_array($mks)) 
    foreach($mksresult as $sdlnme) 
    if($sdlnme = $schedule){ 
     echo "<script> alert('Marks for this schedule already exist in db');</script>"; 
     echo "<script> window.location.href='marks.php';</script>"; 
    }else{ 
     foreach ($array as $reg_num=>$score) 
     { 
     $ins = "INSERT INTO marks (sl_no, scheduleName, obtainedMarks) VALUES ('$reg_num', '$schedule', '$score')"; 
     $res = mysqli_query($link, $ins); 
     if($res){ 
     //echo "Success"; 
     $Message = urlencode("Marks updated successfully "); 
     header("Location:marks.php?Message=".$Message); 
     die; 
     } 
     } 
    } 
} 
?> 

我问题是我无法执行如果和我的代码的一部分。

Answer 1

修改代码，像波纹管：

<?php 
include 'config.php'; 
if(isset($_POST['submit'])){ 
    $schedule = $_POST['hischedule']; 
    $array = $_POST['marks']; 
    $marksupdqry = "select distinct scheduleName from marks"; 
    $mks = mysqli_query($link, $marksupdqry); 
    while($mksresult = mysqli_fetch_array($mks)){ 
    foreach($mksresult as $sdlnme){ 
    if($sdlnme == $schedule){ 
     echo "<script> alert('Marks for this schedule already exist in db');</script>"; 
     echo "<script> window.location.href='marks.php';</script>"; 
    }else{ 
     foreach ($array as $reg_num=>$score) 
     { 
     $ins = "INSERT INTO marks (sl_no, scheduleName, obtainedMarks) VALUES ('$reg_num', '$schedule', '$score')"; 
     $res = mysqli_query($link, $ins); 
     if($res){ 
     //echo "Success"; 
     $Message = urlencode("Marks updated successfully "); 
     header("Location:marks.php?Message=".$Message); 
     die; 
     } 
     } 
    } 
    } 
} 
} 
?>