「警告：非法串偏移 'ID' 在C：\ XAMPP \ htdocs中\上線博客\ posts.php 2」

功能：

function get_short_posts() { 
    $sql = "SELECT * FROM posts ORDER by id DESC LIMIT 0, 5"; 
    $result = mysql_query($sql); 
    while($row = mysql_fetch_assoc($result)) { 
     $timestamp = new DateTime($row['date']); 
     return array (
      "id" => $row['id'], 
      "title" => $row['title'], 
      "content" => $row['content'], 
      "author" => $row['author'], 
      "date" => $timestamp->format('d-m-Y'), 
      "time" => $timestamp->format('H:i') 
     ); 
    }

致電：

require_once "functions.php"; 
    $_posts = get_short_posts(); 
    foreach($_posts as $_post) { 
     echo $_post['id']; 
    }

來源

2014-01-18 Settori

嘗試在你的while循環中執行'die（var_dump（$ row））;'。這將停止所有其他執行，並在屏幕上顯示錯誤。 –

你知道你在get_short_posts函數的第一次迭代之後返回權限，所以foreach將無法按預期工作。 –

請顯示您的表格列名稱。也許列「ID」稱爲「Id」或「ID」？ –

你知道你在get_short_posts函數的第一次迭代之後返回權限，所以foreach將無法按預期工作。

嘗試：

<?php 
function get_short_posts() { 
    $sql = "SELECT * FROM posts ORDER by id DESC LIMIT 0, 5"; 
    $result = mysql_query($sql); 
    $return = array(); 
    while($row = mysql_fetch_assoc($result)) { 
     $timestamp = new DateTime($row['date']); 
     $return[] = array (
      "id" => $row['id'], 
      "title" => $row['title'], 
      "content" => $row['content'], 
      "author" => $row['author'], 
      "date" => $timestamp->format('d-m-Y'), 
      "time" => $timestamp->format('H:i') 
     ); 
    } 
    return $return; 
} 
?> 

<?php 
require_once "functions.php"; 

foreach(get_short_posts() as $_post) { 
    echo $_post['id']; 
} 
?>

此外，Don't use mysql_* functions in new code。他們不再維護and are officially deprecated。請參閱red box？請改爲了解prepared statements，並使用PDO或MySQLi - this article將幫助您決定哪個。如果您選擇PDO，here is a good tutorial。

來源

2014-01-18 21:18:20

謝謝！有用！ :) – Settori

不要忘記接受，多數民衆贊成你如何能夠感謝我; p –

這是我用來學習PDO的教程大聲笑...偉大的工作... –

function get_short_posts() { 
    $sql = "SELECT * FROM posts ORDER by id DESC LIMIT 0, 5"; 
    $result = mysql_query($sql); 
    while($row = mysql_fetch_assoc($result)) { 
     $timestamp = new DateTime($row['date']); 
     $data [] = array (
      "id" => $row['id'], 
      "title" => $row['title'], 
      "content" => $row['content'], 
      "author" => $row['author'], 
      "date" => $timestamp->format('d-m-Y'), 
      "time" => $timestamp->format('H:i') 
     ); 

    } 
    return $data; 
    }

你會返回數據，所以循環停止，將數據保存在一個數組中，並像返回代碼一樣返回該數組。

來源

2014-01-18 21:18:09

你的代碼錯了，它應該如下，假設查詢返回的數據如前所述。

function get_short_posts() { 
    $sql = "SELECT * FROM posts ORDER by id DESC LIMIT 0, 5"; 
    $result = mysql_query($sql); 
    $rows = array(); 
    $return_data = array(); 
    while($row = mysql_fetch_assoc($result)) { 
     $timestamp = new DateTime($row['date']); 
     $data = array (
      "id" => $row['id'], 
      "title" => $row['title'], 
      "content" => $row['content'], 
      "author" => $row['author'], 
      "date" => $timestamp->format('d-m-Y'), 
      "time" => $timestamp->format('H:i') 
     ); 
     $return_data[] = $data; 
    } 
    return $return_data ; 

} 


require_once "functions.php"; 
    $posts = get_short_posts(); 
    foreach($posts as $key=>$val) { 
     echo $val['id']; 
    }

來源

2014-01-18 21:19:02

PHP - 帶數組的foreach函數

回答

嘗試：

PHP - 帶數組的foreach函數

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