Re: Help with msql_fetch_array()
| From: | PHPCoder | Date: | Wed, 24 Jul 2002 17:50:58 +0000 |
| Subject: | Re: Help with msql_fetch_array() | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-109331@lists.php.net to get a copy of this message | ||
I can almost guarantee that it's not the second line that is "failing", the problem here is that $result is not containing naything, and that is normally due to the fact that you are not connecting to the db, or the table "tablename" is not there.
I use the following format as my "standard" MySQL connect and query snippet:
$link = @mysql_connect("localhost",$username,$password) or die ('Could not connect!'); //@ suppresses the default error message generated by this function and the "or die()" bit kills the script right then and there should it not be able to connect.
mysql_select_db("YOUR_DB_NAME",$link);
$sql = "select * from your_table_name";
if ( $result = mysql_query($sql)) { // checks to see if $result contains anything before it even tries to fetch an associative array from it.
$row = mysql_fetch_assoc($result);
} else {
echo "Empty result set!";
Note also that I use mysql_fetch_assoc and NOT mysql_fecth_array, as 9 out of 10 times, you don't need the array element id's that is returned by mysql_fetch_array.
Matthew Bielecki wrote:
I have a couple of scripts that fail with the error of: Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in... I'm new to both SQL and PHP and I'm wondering if I have some setting turned off or what. Here's the piece of code that is failing (the second line fails): $result = mysql_db_query($dbname, "SELECT * FROM tablename ORDER BY id");$row = mysql_fetch_array($result);Thanks for your help in advance!!