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    mysqli::real_query

    mysqli_real_query

    (PHP 5, PHP 7)

    mysqli::real_query -- mysqli_real_query — Execute an SQL query

    Descrierea

    Stil obiect-orientat

    public mysqli::real_query ( string $query ) : bool

    Stil procedural

    mysqli_real_query ( mysqli $link , string $query ) : bool

    Executes a single query against the database whose result can then be retrieved or stored using the mysqli_store_result() or mysqli_use_result() functions.

    In order to determine if a given query should return a result set or not, see mysqli_field_count().

    Parametri

    link

    Numai stilul procedural: Un identificator al legăturii întors de mysqli_connect() sau mysqli_init()

    query

    The query, as a string.

    Data inside the query should be properly escaped.

    Valorile întoarse

    Întoarce valoarea true în cazul succesului sau false în cazul eșecului.

    A se vedea și

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    User Contributed Notes 3 notes

    up
    1
    TIL
    6 years ago
    Please note that this example is vulnerable to injection and uses plain-stored passwords...
    up
    0
    jay at cloudulus dot media
    5 years ago
    Well, we don't know if $password is in plain text because it was never defined in the example.

    New passwords should be stored using

    <?php
    $crypt_pass     = password_hash($password, PASSWORD_DEFAULT);
    ?>

    Where PASSWORD_DEFAULT = BCRYPT algorithm

    Then to compare a user entered password to a database stored password, we use:

    <?php
    $valid     = password_verify($password, $crypt_pass);
    ?>

    Which returns true or false.

    As for being vulnerable to injection, this is true. To avoid this, use sprintf() or vsprintf() to format the query and inject the values using mysqli::real_escape_string, like so:

    <?php
    $vals     = [$db->real_escape_string($username), $db->real_escape_string($password)];
    $query = vsprintf("Select * From users Where username='%s' And password='%s'", $vals);
    $result = $db->real_query($query);
    ?>
    up
    -58
    Tinker
    8 years ago
    Straightforward function - simply connect to the database and execute a query, similar to this function bellow.

    <?php

    function check_password($username, $password) {
    // Create connection
    $db = new mysqli('localhost','database_user','database_pass','database_name');

    // Check for errors
    if($db->connect_errno){
    echo     $db->connect_error;
    }

    // Execute query
    $result = $db->real_query("Select * From users Where username='$username' And password='$password'");

    // Always check for errors
    if($db->connect_errno){
    echo     $db->connect_error;
    }

    return     $result == true;
    }
    ?>

    Very easy.

    Replace database_user, database_pass and database_name with the proper names, and the text inside real_query with your actual query.

    Don't forget the quotes on either side (except for numbers, there you can omit them) otherwise it won't work. Hope that helps someone.
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