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mysqli alternative for mysql_result

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I am new to mysqli and have a little question. I have tried to find an alternative for a while now but nothing seems to work... maybe somebody could help.


So my old code is this


function ($email) {
$query = mysql_query("SELECT COUNT(`user_id`) FROM users WHERE email = '$email'")or die (mysql_error());
return (mysql_result($query, 0) == 1) ? true : false;
after that the function is used like this : 
if (login_email_exists($mysqli,$_POST['email']) === true) {
$errors[] = 'Sorry this email adress is already in use.';
And my new code is this 
function ($mysqli,$email) {
$query = $mysqli->query("SELECT COUNT(`user_id`) FROM users WHERE email = '$email'")or die (mysql_error());
return ($query == 1) ? true : false;
Now it seems to always go wrong when I want to check the result and return if it's true or false. If anybody can find an answer or alternative to my problem I would be very happy.
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  • Solution

I suggest preparing the data for database interaction instead of using the simple query() function.  The reason being is that the class does a great job with sanitation, and validation when using the bind_param() method.



function login_email_exists($mysqli,&$email) {
if(!$query = $mysqli->prepare("SELECT COUNT(`user_id`) FROM  users WHERE email = ?")) {
return ($count > 0) ? true : false;
Edited by jcbones
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return ($count > 0) ? true : false;


Pro tip:if you are using a condition and want a Boolean as the result, there is no need to actually create a TRUE and FALSE for the result because the condition itself will be a Boolean. That is basically the same as saying If true, return true, else return false.


This will work just the same to return a Boolean:


return ($count > 0);
Edited by Psycho
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