如何在PHP中添加新阵列

Question

如何将新阵列添加到用户会话或相同/现有会话中。我有以下两个PHP文件。

1. fruits.php

   <?php 
   <form action="processfruits.php" method="POST"> 
   
   <select name="myfruit_list[]"> 
       <option value="apples">Apples</option> 
       <option value="oranges">Oranges</option> 
   </select> 
   
   <select name="myfruit_list[]"> 
       <option value="grapes">Grapes</option> 
       <option value="pears">Pears</option> 
   </select> 
   
   <input type="submit" value="Confirm Order"> 
   
   </form> 
   ?> 
   

2. processfruits.php

   <?php 
   
   $data = array(); 
   $data = $_POST['myfruit_list']; 
   
   echo "Number of Fruit Bowls: " . count($data) . "<br />"; 
   
   foreach($data as $selection => $name) 
   { 
       echo "<br>" . $selection . ":  "; 
       $string = implode(", ", $name); 
       echo $string . "<br />"; 
   } 
   
   ?> 
   

我希望实现用于下相同的用户会话中的每个处理/确认输出：

Number of Fruit Bowls: 4 

    Data 1: Apples, Grapes 
    Data 2: Oranges, Pears 
    Data 3: Apples, Pears 
    Data 4: Oranges, Grapes 

如何在每次用户提交确认订单按钮而不覆盖第一个订单确认或数组时，让数组看起来像上面那样。

Answer 1

我想你想要这样的：

<?php 
session_start(); 

if($_SERVER["REQUEST_METHOD"]=="POST") { 
    $_SESSION["data"]=array_merge($_POST['myfruit_list'],$_SESSION["data"]); 
    $data = array(); 
    $data = $_SESSION["data"]; 
    $t=2; 
    echo "Number of Fruit Bowls: " . count($data)/2 . "<br />"; 

    foreach($data as $selection => $name) { 
     if($t%2==0) { 
      echo "<br>"; 
      echo "data : ".($t/2)." "; 
     } 
     else { 
      echo ","; 
     } 

     echo $name; 
     $t++; 
    } 
} 
else { 
    $_SESSION["data"]=[]; 
} 
?> 

<form action="<?php echo $_SERVER['PHP_SELF'];?>" method="POST"> 
    <select name="myfruit_list[]"> 
     <option value="apples">Apples</option> 
     <option value="oranges">Oranges</option> 
    </select> 
    <select name="myfruit_list[]"> 
     <option value="grapes">Grapes</option> 
     <option value="pears">Pears</option> 
    </select> 
    <input type="submit" value="Confirm Order"> 
</form> 

更新的要求......

<?php 
    session_start(); 

    if($_SERVER["REQUEST_METHOD"]=="POST") { 


    if(isset($_POST["del"])) 
    {  
    $oft=$_POST["del"]; 
    unset($_SESSION["data"][2*$oft-1]); 
    unset($_SESSION["data"][(2*$oft-2)]); 

    } 
    else 
    { 

    $_SESSION["data"]=array_merge($_POST['myfruit_list'],$_SESSION["data"]); 

    } 

    $t=2; 
    $data=$_SESSION["data"]; 
    echo "Number of Fruit Bowls: " . count($data)/2 . "<br />"; 

    foreach($data as $selection => $name) { 
    if($t%2==0) { 
     echo "<br>"; 
     echo "data : ".($t/2)." "; 
    } 
    else { 
     echo ","; 
    } 

    echo $name; 
    $t++; 


    } 
    } 

    else { 
$_SESSION["data"]=[]; 
    } 
    ?> 

     <form action="<?php echo $_SERVER['PHP_SELF'];?>" method="POST"> 
<select name="myfruit_list[]"> 
    <option value="apples">Apples</option> 
    <option value="oranges">Oranges</option> 
</select> 
<select name="myfruit_list[]"> 
    <option value="grapes">Grapes</option> 
    <option value="pears">Pears</option> 
</select> 
<input type="submit" value="Confirm Order"> 
     </form> 


    <form action="<?php echo $_SERVER['PHP_SELF'];?>" method="POST"> 
    <input type="text" placeholder="row number to be deleted..." name="del"> 
    <input type="submit" value="Delete row"> 
    </form> 

ok..one更form..add此代码相同的页面.. 。

<form action="add.php" method="POST"> 
    <input type="submit" value="add"/> 
    </form> 

add.php ........

<?php 

    session_start(); 

    if($_SERVER["REQUEST_METHOD"]=="POST") 
    { 
    [email protected]_connect("localhost","root","") or die("could not connect to database"); 
    [email protected]_select_db("stack",$conn) or die("could not select database"); 

     $data=$_SESSION["data"]; 
    $temp="";$t=0; 

    foreach($data as $selection => $name) { 


    if($t%2==0) { 
    $temp=$name; 
    echo $temp; 
    } 
    else { 

    $id=rand(1000,9999); 
    $row=ceil(($t/2)); 
    $sql="insert into st(id,row,fruit1,fruit2) values(\"$id\",\"$row\",\"$name\",\"$temp\")"; 
    $res=mysql_query($sql,$conn) or die("could not execute "); 


     }  
     $t++; 
    } 

    } 
    ?>