php - Executing mysqli prepared statment within while loop that's within another while loop
one text
Solution:
stmt->store_result() can not run before stmt->execute().
$stmtUsers = $conn->prepare("SELECT username, setting1 FROM Users");
if ($stmtUsers->execute() === FALSE) {
die("Could not execute prepared statement");
} else {
$stmtUsers->store_result(); // After execute()
$stmtUsers->bind_result($user, $setting1);
while ($stmtUsers->fetch()) {
/* Check if each user has setting 1 disabled */
if ($setting1 == '0'){
/* Check if any alerts exist for each user */
$stmtUsersAlerts = $conn->prepare("SELECT name, filter, email FROM Alerts WHERE user='".$user."' AND type='1'");
$stmtUsersAlerts->execute(); // This line was missing
$stmtUsersAlerts->store_result();
$stmtUsersAlerts->bind_result($name, $filter, $email);
while ($stmtUsersAlerts->fetch()) {
/* Send email */
}
$stmtUsersAlerts->close();
}
}
$stmtUsers->close();
}
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