wamp / php error Fatal error: Class 'mysqli_connect' not found in C:\wamp\www\finalproject\Connections\Main_DB.php on line 9 [duplicate]

问题

hi could someone assist me in this issue.

this is my connection string:

<?php

    #FileName = "Connection_php_mysql.htm"
    #Type = "MYSQL"
    #HTTP = "true"

    $hostname_Main_DB = "localhost";
    $database_Main_DB = "mydb";
    $username_Main_DB = "root";
    $password_Main_DB = "";

    $con = new mysqli_connect($hostname_Main_DB,$username_Main_DB. $password_Main_DB, $database_Main_DB) or die ( "Failed to connect to MySQL: " . mysqli_connect_errno());     $db=mysqli_select_db($database_Main_DB,$con) or die( "Failed to connect to MySQL: " .     mysqli_connect_errno());
?>

I have installed wamp server and mysqli extension is enabled.

hope you will be able to help me with this issue,

Tnx, Yotam

回答1:

Code should be

<?php

    #FileName = "Connection_php_mysql.htm"
    #Type = "MYSQL"
    #HTTP = "true"

    $hostname_Main_DB = "localhost";
    $database_Main_DB = "mydb";
    $username_Main_DB = "root";
    $password_Main_DB = "";

    $con = mysqli_connect($hostname_Main_DB,$username_Main_DB,$password_Main_DB, $database_Main_DB) or die ( "Failed to connect to MySQL: " . mysqli_connect_errno());

    $db=mysqli_select_db($database_Main_DB,$con) or die( "Failed to connect to MySQL: ".mysqli_connect_errno());
?>

You should remove "new". For more information read this

Edit :-

Also you have added . in between two variable that should be ,

$username_Main_DB. $password_Main_DB replace this with $username_Main_DB,$password_Main_DB