Feelay
Feb 1 2008, 06:17 PM
Hey! I've made a register script.. Some time ago it worked. And I ain't sure if I changed something since then.. The error I am getting is this: Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in /home/feelay/public_html/regcheck.php on line 31 Here is the code on theese lines: CODE $sqlCheckForDuplicate = "SELECT username FROM user WHERE username = '". $username ."'";
if( mysql_num_rows( mysql_query( $sqlCheckForDuplicate ) ) == 0 )
{
$sqlRegUser = "INSERT INTO
user( username, password )
VALUES(
'". $username ."',
'". $password ."'
)";
if( !mysql_query( $sqlRegUser ) )
{
$feedback[] = 'You Could Not Register Because Of An Unexpected Error.';
} Any Idea What I've made wrong. And maybe anyone can tell me when mysql_num_rows errors occure. Thank You For You're Help //Feelay
Reply
TavoxPeru
Feb 8 2008, 02:10 AM
QUOTE(Feelay @ Feb 1 2008, 01:17 PM)  Hey! I've made a register script.. Some time ago it worked. And I ain't sure if I changed something since then.. The error I am getting is this: Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in /home/feelay/public_html/regcheck.php on line 31 Here is the code on theese lines: CODE $sqlCheckForDuplicate = "SELECT username FROM user WHERE username = '". $username ."'";
if( mysql_num_rows( mysql_query( $sqlCheckForDuplicate ) ) == 0 )
{
$sqlRegUser = "INSERT INTO
user( username, password )
VALUES(
'". $username ."',
'". $password ."'
)";
if( !mysql_query( $sqlRegUser ) )
{
$feedback[] = 'You Could Not Register Because Of An Unexpected Error.';
} Any Idea What I've made wrong. And maybe anyone can tell me when mysql_num_rows errors occure. Thank You For You're Help //Feelay You got that error because your query returns FALSE and the mysql_num_rows() function expects a valid result set, in this case it means that it is a new user and is valid to register, to work, try this code instead: CODE <?php
$sqlCheckForDuplicate = "SELECT username FROM user WHERE username = '". $username ."'";
$result = mysql_query($sqlCheckForDuplicate) or die(mysql_error());
if(mysql_num_rows($result)>0)
{
$feedback[] = 'You Could Not Register Because the User already exists.';
}
else
{
$sqlRegUser = "INSERT INTO user(username, password) VALUES('$username','$password')";
if(!mysql_query($sqlRegUser))
{
$feedback[] = 'You Could Not Register Because Of An Unexpected Error.';
}
}
?> Best regards,
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