Question

我是php新手，我制作了一个php，首先获取一个变量并从数据库中找到一个变量（arithmos_ff），然后运行html代码（与aithsh.php代码在同一个文件中）并取一个从它的第二篇文章我想与“arithmos_ff”进行比较。但是在发送后发布第二个变量后显示“Undefined index：arithmos_ff”。如何保留第一个变量并在第二个帖子完成后使用它？提前谢谢你！`

<?php

$connect=mysqli_connect('localhost','root','','project');
 
if($connect->connect_error)
{
		die( 'Failed to connect');
}
else {echo 'connect worked';}

	$_SESSION['titlos'] = $_GET["value"];//take the first variable
  $titlos=$_SESSION['titlos'];

echo"<br>Ο αιτούμενος επιθυμεί να λάβει την διπλωματική με τίτλο ".$titlos ;

 $sql2="SELECT ar_foithtwn FROM diplwmatikh WHERE find_in_set('$titlos',title)  > 0";
 $result3=$connect->query($sql2);
 if(mysqli_num_rows($result3)){
	while($row1=$result3->fetch_assoc()){
		
		   $GLOBALS['arithmos_ff']=$row1['ar_foithtwn'];
//arithmos_ff=i want to keep it!
		echo" <br>o arithmos foithtwn pou epitrepetai nanalavoun thn diplwmatikh einai :".$row1['ar_foithtwn'];
 }
 }

if (isset($_POST['number'])){//this is the second post that get from html

    $GLOBALS['arithmos']=$_POST['arithmos'];

 
 
check_number();
//and i want to compare 'arithmos' with 'arithmos_ff' in this function
}
function check_number() {//to use it in this function after second post
  
 if(  $GLOBALS['arithmos']==  $GLOBALS['arithmos_ff']){
	 echo"<br>Ο αριθμός των φοιτητών που προβλέπεται να την αναλάβουν είναι ο επιθυμητός : ".$GLOBALS['arithmos'] ;
	 $sql="UPDATE diplwmatikh SET katastash=2 WHERE find_in_set('$titlos',title) > 0";
if(mysqli_query($connect,$sql)){
    echo "<br>Update η κατασταση της διπλωματικης σε 2(υπο έγκριση).";
	
} else{
    echo "ERROR: Could not able to execute $sql. " . mysqli_error($connect);
}
}}
	

	
 
?> `

Answer 1

每次加载脚本时都会重置

$GLOBAL。所以它不再是第二次提交。所以你需要将值存储在SESSION

中

启动页面顶部的session

session_start();

在此会话中存储

while($row1=$result3->fetch_assoc()){

           $_SESSION['arithmos_ff']=$row1['ar_foithtwn'];
           //arithmos_ff=i want to keep it!
           echo" <br>o arithmos foithtwn pou epitrepetai nanalavoun thn diplwmatikh einai :".$row1['ar_foithtwn'];
 }

像这样访问

if (isset($_POST['number'])){

    $_SESSION['arithmos']=$_POST['arithmos'];

    check_number();
}

功能

function check_number() {

 if(  $_SESSION['arithmos']==  $_SESSION['arithmos_ff']){

      ......
    }
}

在第二次POST后保持全局值

1 个答案: