Chapter 15: Page 452, Message Board. Line 33

[markifornia]

On line 33 it reads:

 

$words = FALSE; // Flag variable

 

- Why is this needed? Why false boolean?

 

 

On line 37 it reads:

 

$r = msyqli_query($dbc, $q);

 

if (mysqli_num_rows($r) == 1) {

 

$words = mysqli_fetch_array($r, MYSQLI_ASSOC);

 

}

 

- Is this common practice, to check to see if there is at least one result returned from the query? In some scripts, this is included and then in some it is. For example go to line 47 of the same script, when the array is fetched the function isn't wrapped in the same way as above.

 

 

Line 46, 47:

 

$r = msyqli_query($dbc, $q);

 

$r = mysqli_fetch_array($r, MYSQLI_ASSOC);

[Edward]

Well the database has to check there is at least one record to process the next section. You have to check for something otherwise how can you process next section of script

[markifornia]

hmm makes sense Edward

 

if (mysqli_num_rows($r) == 1) {

 

it would be a good idea to always wrap the fetch function inside of this conditional block. I have some scripts that don't have this, looks like I'll be looking to modify those now.