PHP check if value exists in MySQL [closed] - php

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I tried to copy How to Check if value exists in a MySQL database and make my own, but for some reason it wont work...
This is what I got:
<?php
$host = '127.0.0.1';
$username = 'root';
$password = '';
$dbname = 'multiplayer';
$con=mysqli_connect($host, $username, $password, $dbname);
$check_player_ip=mysqli_query($con, 'SELECT `player_ip` FROM `playerdata` WHERE username = "remco" AND active = 0');
if (mysqli_num_rows($check_player_ip) == 0) {
//didnt find anything
} else{
//found something
}
?>
I get this error:
Parse error: syntax error, unexpected '$check_player_ip' (T_VARIABLE) in C:\xampp\htdocs\test.php on line 1
Solution
If you get the T_VARIABLE error, check the varriable before this rule. You may forgot the place the ';' xD
Thanks for all support!

Answer 1

You are mixing MySQL APIs, they do not mix together. mysql_num_rows
Use mysqli_num_rows()
Also make sure your DB connection is also mysqli_* and not mysql_*
EDIT after you've edited your question.
You need to pass DB connection to your query:
$check_player_ip=mysqli_query($con,'SELECT...`
$con being your DB connection. Change accordingly.
Plus WHERE username = remco - the word remco needs to be wrapped in quotes, it's a string and not an int.
WHERE username = 'remco'
Sidenote:
Your present code is open to SQL injection.
Use prepared statements, or PDO with prepared statements.
Edit 2:
Try inverting the quotes:
$check_player_ip=mysqli_query($con, "SELECT `player_ip` FROM `playerdata` WHERE username = 'remco' AND active = 0");
if (mysqli_num_rows($check_player_ip) == 0) {
//didnt find anything
}

Answer 2

Try this:
<?php
$host = '127.0.0.1';
$username = 'root';
$password = '';
$dbname = 'multiplayer';
$con = new mysqli( $host, $username, $password, $dbname );
/* Check Connection */
if ( $con->connect_error ) {
printf( "Connect failed: %s\n", $con->connect_error );
exit();
}
/* Query - Returns a resultset */
if ( $result = $con->query('SELECT `player_ip` FROM `playerdata` WHERE username = "remco" AND active = 0 ') ) {
if ( $result->num_rows <= 0 ) {
//didnt find anything
printf("No player");
} else {
//found something
printf("Select returned %d rows.\n", $result->num_rows);
}
/* free result set */
$result->close();
}
/* close connection */
$con->close();
?>

Answer 3

you should execute that mysqli query...
while($rows = mysql_arrayAssoc($ursql)){
$data[]=$rows;
}
if($something== $data['attribute']) //attribute(id,name...)
echo "ok some data is in"
else
echo "no matching data"
I hope it help you :)