编写PHP时遇到错误

Question

我正在尝试显示用户名一段时间，我也用PHP编写。但它显示错误。请帮我修复错误：

<?php
    include("config.php");
    if(time() <= strtotime("2012-11-10")) {
        $link=mysql_connect($db_host,$db_username) ;
        mysql_select_db($db_name,$link) ;
        $query = mysql_query("SELECT * FROM tbluser");
        while($v = mysql_fetch_array($query)) {
            $username = $v['username'];
            echo("<center><table border='1' cellpadding='0' cellspacing='0' style='border-collapse: collapse' bordercolor='#111111' width='343' id='AutoNumber1'>");
            echo("<tr><td><b>UserName</b></td>");
            echo("</tr>");
            echo("<tr><td>$username</td>");
            echo("</td></tr></table>");
        }
    else
        echo 'testing period dated ended';
    }
?>

Answer 1

$link = mysql_connect($db_host,$db_username, /* PASSWORD HERE */);

您需要为mysql connection指定密码。

Answer 2

你缺少大括号和mysql_connect的第三个参数：

<?php
include("config.php");
if(time() <= strtotime("2012-11-10")) {
    $link=mysql_connect($db_host,$db_username,$password) ;
    mysql_select_db($db_name,$link) ;
    $query = mysql_query("SELECT * FROM tbluser");
    while($v = mysql_fetch_array($query)) {
        $username = $v['username'];
        echo("<center><table border='1' cellpadding='0' cellspacing='0' style='border-collapse: collapse' bordercolor='#111111' width='343' id='AutoNumber1'>");
        echo("<tr><td><b>UserName</b></td>");
        echo("</tr>");
        echo("<tr><td>$username</td>");
        echo("</td></tr></table>");
    }
}
else{
    echo 'testing period dated ended';
}
?>

Answer 3

不要使用mysql_*功能。它们已被弃用。阅读指南 here 。

后，请选择其他API

---

您的如果语句需要其结束括号。此外，mysql_connect的语法可能需要密码，除非您在php.ini中使用mysql.default_password作为密码。 （默认为空）

<?php
...
if(...) { // --> needs its closing brace
    $link=mysql_connect($db_host,$db_username) ; // no password?
    ...
    ...
    while(...) {
    ...
    ... 
    } //while closes here WHERE does if close?
else
    ...
}
?>

Answer 4

<?php
include("config.php");
if(time() <= strtotime("2012-11-10")) {
    $link=mysql_connect($db_host,$db_username,$password) ;
    mysql_select_db($db_name,$link) ;
    $query = mysql_query("SELECT * FROM tbluser");
    while($v = mysql_fetch_array($query)) {
        $username = $v['username'];
        echo("<center><table border='1' cellpadding='0' cellspacing='0' style='border-collapse: collapse' bordercolor='#111111' width='343' id='AutoNumber1'>");
        echo("<tr><td><b>UserName</b></td>");
        echo("</tr>");
        echo("<tr><td>$username</td>");
        echo("</td></tr></table>");
    }

}
else
    echo 'testing period dated ended';

Answer 5

首先将第三个参数传递给mysql_connect（），即密码。

第二

<?php
include("config.php");
if(time() <= strtotime("2012-11-10")) {
$link=mysql_connect($db_host,$db_username) ;
mysql_select_db($db_name,$link) ;
$query = mysql_query("SELECT * FROM tbluser");
while($v = mysql_fetch_array($query)) {
$username = $v['username'];
echo("<center><table border='1' cellpadding='0' cellspacing='0' style='border-collapse: collapse' bordercolor='#111111' width='343' id='AutoNumber1'>");
echo("<tr><td><b>UserName</b></td>");
echo("</tr>");
echo("<tr><td>$username</td>");
echo("</td></tr></table>");
 }
}
else {
echo 'testing period dated ended';
}
?>

嵌套不合适