用PHP将数据插入MySQL表时遇到问题

Question

I have a few string variables I am trying to insert them into my DB but I am having trouble because nothing is being inserted into the DB. I know the variables are populated. Since all variables are string I'm converting some of them to integers because those fields in the db table are type integer. I tried assigning the mysql_query to a variable and then check to return an error but it didn't display anything. I'm a bit new at PHP so I'm not sure what's wrong with my code below. I appreciate the help.

$connect = mysql_connect("localhost", "user", "pass");
if (!$connect) { die("Could not connect: ". mysql_error()); }

mysql_select_db("dbname");

mysql_query($connect,"INSERT INTO table1 (id, AU, TI, JO, VL, ISS, PB, SN, UR, DO, SP, EP, PY) VALUES ('NULL', '".$authors."', '".$title."', '".$journal."', '".(int)$volume."', '".(int)$issue."', '".$publisher."', '".$serial."', '".$url."', '".$doi."', '".(int)$startpage."', '".(int)$endpage."', '".(int)$year."')");

mysql_close($connect);

Answer 1

Try to debug your code, adding some more useful checks.

$link = mysql_connect("localhost", "user", "pass");
if (!$link) {
    die("Could not connect: ". mysql_error());
}

$dbSelected = mysql_select_db("dbname", $link);
if (!$dbSelected) {
    die ("Can't select db: " . mysql_error());
}

$result = mysql_query("YOUR_QUERY", $link);
if (!$result) {
    die("Invalid query: " . mysql_error());
}

ps: you may want to use mysqly::query , just because mysql_query is deprecated

ps2: you should google about SQL Injection, since your statement doesn't look secure (unless those values are escaped somewhere)

NOTE: I just noticed that you are using a wrong order for the parameters on mysql_query($query, $link). You have put $link as first parameter.