Re: [PHP] mysqli_query() returns NULL?
On 06/18/11 13:27, Ashley Sheridan wrote: > You'll only get an error if there was an error with the query. A query that > has no result is still a valid query, so won't return an error. It's quite > common to check the value of mysql_num_rows() before trying to use the > results of the query. But in that case it would return boolean true rather than NULL, right? James -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] mysqli_query() returns NULL?
Alex wrote: >If you were to use the proper object form of it, you'd spot the >mistake, as it will tell you that you are trying to perform an action >on a non-object. > >It might be a bug, or the developers might not have cared figuring that >if you threw it in an if(!...) it would validate as false anyways. But >it.might be a bug or an oversight. It might actually be falling through >some ifs and returning the result that was instantiated as null, I >dunno... > >Sent from my Verizon Wireless 4GLTE smartphone > >- Reply message - >From: "James Colannino" >To: >Subject: [PHP] mysqli_query() returns NULL? >Date: Fri, Jun 17, 2011 4:40 pm > > >Hey everyone, > >After reading the documentation for mysqli_query(), I was lead to >believe that on any error it would return false. However, through a >stupid mistake, I discovered that when I specify an invalid value for >the database link identifier (in my case, I accidentally passed an >integer), instead of false I get a return value of NULL. Does anyone >know why? > >Thanks! > >James > >-- >PHP General Mailing List (http://www.php.net/) >To unsubscribe, visit: http://www.php.net/unsub.php You'll only get an error if there was an error with the query. A query that has no result is still a valid query, so won't return an error. It's quite common to check the value of mysql_num_rows() before trying to use the results of the query. Ashley Sheridan http://www.ashleysheridan.co.uk -- Sent from my Android phone with K-9 Mail. Please excuse my brevity. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] mysqli_query() returns NULL?
If you were to use the proper object form of it, you'd spot the mistake, as it will tell you that you are trying to perform an action on a non-object. It might be a bug, or the developers might not have cared figuring that if you threw it in an if(!...) it would validate as false anyways. But it.might be a bug or an oversight. It might actually be falling through some ifs and returning the result that was instantiated as null, I dunno... Sent from my Verizon Wireless 4GLTE smartphone - Reply message - From: "James Colannino" To: Subject: [PHP] mysqli_query() returns NULL? Date: Fri, Jun 17, 2011 4:40 pm Hey everyone, After reading the documentation for mysqli_query(), I was lead to believe that on any error it would return false. However, through a stupid mistake, I discovered that when I specify an invalid value for the database link identifier (in my case, I accidentally passed an integer), instead of false I get a return value of NULL. Does anyone know why? Thanks! James -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
