How to solve the problem of php database connection error

php database connection error is because PHP7.0 has abolished the "mysql_connect" function. The solution is to use the "mysqli_connect" function to connect to the database.

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PHP Connection Database Error

Reason: PHP7.0 abolished the mysql_connect() function

Replacement function:

mysqli_connect();

Example:

<?PHP
    $conn=mysqli_connect("localhost","root","root");
    if($conn){
        echo"ok";
    }else{
        echo"error";    
    }
?>

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