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Teacher Russell
16,873 Pointsrandom fun with arrays
Can someone offer someone offer some explanation of what's happening in this video around 3:00? Too many big changes too quickly and I can't quite figure out why or what:) Thank you!
1 Answer
Jonathan Grieve
Treehouse Moderator 91,252 PointsHi there,
Usually, when you're struggling because it's seemingly happening too fast, it's a good time to watch the video again... you might begin to absorb a little more when you know what to expect in the video.
But I'll try to explain what's going on :)
We're basically iterating through an array with PHP and displaying the results in the browser.
get_item_html() might not seem likee it's doing anything much but we're echoing out the results of a function call.
Every time the loop iterates (which means runs a single cycle through the loop) it will return different items from an array. That's what the 4 does in the rand function. It's limiting the display for 4 random items in the array.
<?php
get_item_html($id, $catalog[$id])
?>
Teacher Russell
16,873 PointsTeacher Russell
16,873 PointsYes, I've got all that. I understand what the random function does, how our custom function...functions basically. I was looking for a little more detailed explanation of how that's happening, with the final modification shown above. What exactly is happening when passing the $id, then the entire array with $id. I can recite the video by heart:) I just don't see this part of it clearly. Step by step what's happening after the last step. When I say there's a lot happening too quickly, I mean a lot seems to happen before it's explained, before the end of the video.