如何在PHP中添加新陣列

Question

如何將新陣列添加到用戶會話或相同/現有會話中。我有以下兩個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 />"; 
   } 
   
   ?> 
   

我希望實現用於下相同的用戶會話中的每個處理/確認輸出：

Number of Fruit Bowls: 4 

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

如何在每次用戶提交確認訂單按鈕而不覆蓋第一個訂單確認或數組時，讓數組看起來像上面那樣。

Answer 1

我想你想要這樣的：

<?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此代碼相同的頁面.. 。

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

add.php ........

<?php 

    session_start(); 

    if($_SERVER["REQUEST_METHOD"]=="POST") 
    { 
    $conn=@mysql_connect("localhost","root","") or die("could not connect to database"); 
    $db=@mysql_select_db("stack",$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++; 
    } 

    } 
    ?>