CODEWITHSUNDEEP
phpmysqli
user1394925
user1394925

Reputation: 752

how to escape string in mysqli

In old mysql() code, to escape a string, I did this:

t.TeacherUsername = '".mysql_real_escape_string($teacherusername)."'

I am changing my code to mysqli, but what I want to know for sure and to be safe, to escape a string in mysqli is it like this below:

t.TeacherUsername = '".mysqli_real_escape_string($teacherusername)."'

Also to connect to mysqli database is it like this below:

$username="xxx";
$password="xxx";
$database="xxx";

mysqli_connect('localhost',$username,$password);

mysqli_select_db($database) or die( "Unable to select database");

All I have done is change mysql to mysqli, is that correct?

UPDATE:

Is this now the correct way to connect to database using mysqli:

$username="xxx";
$password="xxx";
$database="mobile_app";

$mysqli = new mysqli("localhost", $username, $password, $database);

if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

Upvotes: 4

Views: 10111

Answers (1)

SirDarius
SirDarius

Reputation: 42879

Your use of the function is incorrect.

You MUST use the mysqli link resource returned by mysqli_connect as the first parameter to mysqli_real_escape_string.

Example:

$username="xxx";
$password="xxx";
$database="xxx";

$my = mysqli_connect('localhost',$username,$password);

mysqli_select_db($my, $database) or die( "Unable to select database");

$t->TeacherUsername = "'" . mysqli_real_escape_string($my, $teacherusername). "'";

Upvotes: 4

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