## Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community!

### Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

# Code challenge question not covered in any videos prior.

On this challenge it asks you to use the isset funtion which has not been covered at all in the videos leading up to this...can anyone help?

index.php
```<?php
\$facts = array(
57 => ' on Heinz ketchup bottles represents the number of varieties of pickles the company once had.',
2 => ' is the approximate hours a day Giraffes sleeps',
18 => ' is the average hours a Python sleeps per day',
10 => ' per cent of the world is left-handed.',
11 => ' Empire State Buildings, stacked one on top of the other, would be required to measure the Gulf of Mexico at its deepest point.',
98 => '% of the atoms in your body are replaced every year',
69 => ' is the largest number of recorded children born to one woman',
);
for (\$i = 1; \$i < 101; \$i++) {
echo \$i;

}
```

Well, they do provide a link to the documentation for that isset function (http://php.net/manual/en/function.isset.php) but here is what it looks like in action:

```for (\$i = 1; \$i < 101; \$i++) {
echo \$i;
if (isset(\$facts[\$i])) {
echo \$facts[\$i];
}
}
```

Thanks Jeff, in all the topics covered so far this is the first time there has been no example of the function demonstrated so i had no idea how to output the conditional correctly. I could see the if statement used but would not of known how to do the (\$facts[\$i])) correctly followed by the echo \$facts[\$i];

I have enjoyed the PHP course up to now but finding it very hard to follow the instructor now.