mysqli受影响的行返回带有项目数组的0

Question

I came across the following problem. I have an array of items that I want to update. Below is my code:

public function addTranslation( $data = array(), $language ) {
    // Add all words to language
    $stmt = $this->_db->prepare("UPDATE `languages` SET `$language` = ? WHERE `id` = ?");
    $stmt->bind_param('si', $translation, $id);

    $count = 0;
    foreach( $data as $id => $translation ) {
        $stmt->execute();

        if( !empty( $translation ) ) {
            $count++;
        }
    }

    // Check if all filled in words are added
    echo $stmt->affected_rows;
    if( $stmt->affected_rows >= $count ) {
        return true;
    } else {
        return false;
    }
}

I know that the query works fine because when I checked my database after the script ran the updated values are there. Also $stmt->affected_rows works in other places. The problem I have is that I want to check if all the filled in fields are updated but affected_rows always returns 0 even when fields are updated.

Is this something to do with the fact that I update with an array of items?

I hope someone could shed some light on this problem.

Answer 1

The affected_rows only applies to the last execute . Try this:

public function addTranslation( $data = array(), $language ) {
    // Add all words to language
    $stmt = $this->_db->prepare("UPDATE `languages` SET `$language` = ? WHERE `id` = ?");
    $stmt->bind_param('si', $translation, $id);

    $count = 0;
    $affected = 0;
    foreach( $data as $id => $translation ) {
        $stmt->execute();
        $affected += $stmt->affected_rows;

        if( !empty( $translation ) ) {
            $count++;
        }
    }

    // Check if all filled in words are added
    echo $affected;
    if( $affected >= $count ) {
        return true;
    } else {
        return false;
    }
}