Question

剧本：

<?php
        include("connect.php");    
?>    
<form method="POST" action="<?PHP echo $_SERVER['PHP_SELF']; ?>">
    <input type="text" name="name1" />
    <input type="text" name="name2" />
    <input type="text" name="name3" />
    <input type="submit" name="submit" />
</form>    
<?php
if(isset($_POST['submit'])){    
    $name1 = $_POST['name1'];
    $name2 = $_POST['name2'];
    $name3 = $_POST['name3'];

    $myarray = array($name1, $name2, $name3);   

    for($i = 0; $i < count($myarray); $i++){

        $tqs = "SELECT `id` FROM `images` WHERE `image_file` IN ('" . $myarray[$i] . "')";
        $tqr = mysqli_query($dbc, $tqs) or die(mysqli_error($dbc));

        $fetch_array = array();
        $row = mysqli_fetch_array($tqr);
        $fetch_array[] = $row['id'];

        print_r($fetch_array);    
    }    
}    
?>

脚本打印：

Array ( [0] => 558 ) Array ( [0] => 559 ) Array ( [0] => 560 )

如何在一个数组中包含这些值？

E.g：

Array ( [0] => 558 [1] => 559 [2] => 560 )

图像文件名来自表单，值来自＆＃34;图像＆＃34;表。我希望将所选内容存储在一个数组中。

Answer 1

问题是你正在销毁数组并在每次迭代时重新创建它。将该行移出循环，不要在每次迭代时打印数组：

$fetch_array = array(); // only create the array once

for($i = 0; $i < count($myarray); $i++){
    $tqs = "SELECT `id` FROM `images` WHERE `image_file` IN ('" . $myarray[$i] . "')";
    $tqr = mysqli_query($dbc, $tqs) or die(mysqli_error($dbc));

    $row = mysqli_fetch_array($tqr);
    $fetch_array[] = $row['id'];
}

print_r($fetch_array); // only output once

附注：您的查询容易受到SQL注入攻击。切换到带有绑定参数的Prepared语句。

Answer 2

您必须在循环外声明您的数组。否则你会继续覆盖数组。

<?php
    include("connect.php");
?>

<form method="POST" action="<?PHP echo $_SERVER['PHP_SELF']; ?>">
    <input type="text" name="name1" />
    <input type="text" name="name2" />
    <input type="text" name="name3" />
    <input type="submit" name="submit" />
</form>

<?php

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

    $name1 = $_POST['name1'];
    $name2 = $_POST['name2'];
    $name3 = $_POST['name3'];

    $myarray = array($name1, $name2, $name3);

    $fetch_array = array();     // <----------- Declare here
    for($i = 0; $i < count($myarray); $i++){

        $tqs = "SELECT `id` FROM `images` WHERE `image_file` IN ('" . $myarray[$i] . "')";
        $tqr = mysqli_query($dbc, $tqs) or die(mysqli_error($dbc));

        $row = mysqli_fetch_array($tqr);
        $fetch_array[] = $row['id'];
    }

    print_r($fetch_array);      // <----------- Print here
}

?>

在一个数组中有多个值 - For Loop？

2 个答案: