Page 136 - PHP Novice to Ninja

PHP
1

Hi,
I am studying on Novice to Ninja 5th Edition, in particular the four Chapter page 136.

I can to add and delete jokes fine, but when delete the last one, I have these errors:

Notice: Undefined variable: jokes in /Applications/MAMP/htdocs/deletejoke/jokes.html.php on line 10

Warning: Invalid argument supplied for foreach() in /Applications/MAMP/htdocs/deletejoke/jokes.html.php on line 10

I am using the source code download from website.

Thank you

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Post the lines the errors are on

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It’s caused by there not being any jokes returned by the database. When there’s jokes in the database they get placed into the $jokes array but if there is no jokes then $jokes is just an empty string. To solve it, just before the line where you access the result set, add this line:

$jokes=array();

That will set $jokes up as an empty array, if there are jokes they’ll be added to the $jokes array, if there aren’t any jokes then the $jokes array will be empty and the foreach loop will see an empty array.

@HAWK can the appropriate person at HQ please fix this error? It seems to come up with every edition of Kevin’s book

4

Ok thank you.
I have try to add $jokes=array( ); before <?php foreach ($jokes as $joke): ?>, but when add a new joke and refresh the page, the joke not view.

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Calling in @Simon_Mackie

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It’s just before when the result set is fetched that it needs to go

7

Ok perfect thank you

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