php mysql if exists code example

Example 1: php mysql if exists

$mysqli = new mysqli(SERVER, DBUSER, DBPASS, DATABASE);
$result = $mysqli->query("SELECT id FROM mytable WHERE city = 'c7'");
if($result->num_rows == 0) {
     // row not found, do stuff...
} else {
    // do other stuff...
}
$mysqli->close();

Example 2: mysql check if value exists

mysql> SELECT EXISTS(SELECT * from ExistsRowDemo WHERE ExistId=105);