報錯：Fatal error: Uncaught Error: Call to undefined function mysql_connect() in 和php網站打開一片空白【解決】

 

mysql_connect()這個函數不再使用

 

 不要修改php.ini文件，改成mysqli_connect()就可以了

全局替換后

報錯：Warning: mysqli_error() expects exactly 1 parameter, 0 given in

    $con = mysqli_connect( $dbhost, $dbuser, $dbpass );
    if ( !$con ) {
        die( '數據庫鏈接出錯，請檢查賬號密碼及地址是否正確: ' . mysqli_error() );
    }

之前開了數據庫端口，重新改為3306后：

 

原代碼：

    $con = mysql_connect( $dbhost, $dbuser, $dbpass );
    if ( !$con ) {
        die( '數據庫鏈接出錯，請檢查賬號密碼及地址是否正確: ' . mysql_error() );
    }

    $result = mysql_query('show databases;') or die ( mysql_error() );;
    While($row = mysql_fetch_assoc($result)){       
        $data[] = $row['Database'];
    }
    unset($result, $row);
    if (in_array(strtolower($dbname), $data)){
        mysql_close();
        echo "<script>if(!alert('數據庫已存在')){window.history.back(-1);}</script>";
        exit();
    }

    mysql_query( "CREATE DATABASE $dbname", $con ) or die ( mysql_error() );

修改為

    $con = mysqli_connect( $dbhost, $dbuser, $dbpass );
    if ( !$con ) {
        die( '數據庫鏈接出錯，請檢查賬號密碼及地址是否正確: ' . mysqli_error() );
    }

    $result = mysqli_query($con,'show databases;') or die ( mysqli_error($con) );;
    While($row = mysqli_fetch_assoc($result)){
        $data[] = $row['Database'];
    }
    unset($result, $row);
    if (in_array(strtolower($dbname), $data)){
        mysqli_close();
        echo "<script>if(!alert('數據庫已存在')){window.history.back(-1);}</script>";
        exit();
    }

    mysqli_query( $con,"CREATE DATABASE $dbname" ) or die ( mysqli_error($con) );

數據庫連接成功

 

 

經過已上安裝成功后，點擊確認，然后頁面一片空白：

 

檢查配置文件，猜測是配置文件配置不正確導致 ，

參考：https://help.aliyun.com/knowledge_detail/36451.html

 

先查看配置文件，

<?php

error_reporting(0);

if (!file_exists($_SERVER["DOCUMENT_ROOT"] . '/sys/install.lock')) {
    header("Location: /install/install.php");
    exit;
}

include_once '../sys/lib.php';

$host = "localhost";
$username = "root";
$password = "root";
$database = "vauditdemo";

$conn = mysql_connect($host, $username, $password);
mysql_query('set names utf8', $conn);
mysql_select_db($database, $conn) or die(mysql_error());
if (!$conn) {
    die('Could not connect: ' . mysql_error());
    exit;
}

session_start();

?>

修改為：

<?php

error_reporting(0);

if (!file_exists($_SERVER["DOCUMENT_ROOT"] . '/sys/install.lock')) {
    header("Location: /install/install.php");
    exit;
}

include_once '../sys/lib.php';

$host = "localhost";
$username = "root";
$password = "root";
$database = "vauditdemo";

$conn = mysqli_connect($host, $username, $password);
mysqli_query('set names utf8', $conn);
mysqli_select_db($conn,$database) or die(mysqli_error());
if (!$conn) {
    die('Could not connect: ' . mysqli_error());
    exit;
}

session_start();

?>

打開成功：