Random Item Of An Array
What is the best way of picking out a random item of an array, regarding speed and CPU-usage ? I need a super fast way of picking out an ID from my MySQL db.
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Choose Random Item From List But With Different Weighting
I want to choose an item at random, but have different probabilities for each item. One easy way is just to create an array like $a[]=1 $a[]=2 $a[]=3 $a[]=3 That way a random number between 1 and 4 would give the weighting I want, but it seems like there has to be a much smarter way to do this. I've seen some algorithms for random distributions, but they don't quite do what I want. Oh yeah - must not require a DB; this should work with values from a CSV or similar ...
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Array Explode Problem Result In A 6 Item Array
I have the following: $BB_Basket = "basket=¦APL6007,2.00¦AVX8900,1.00¦ARCAV500,1.00"; $basket_containers = explode('¦', $BB_Basket); unset($basket_containers[0]); print_r($basket_containers); This results in Array ( [1] => APL6007,2.00 [2] => AVX8900,1.00 [3] => ARCAV500,1.00 ) Now when I try to explode further with $basket_items = explode(',', $basket_containers); print_r($basket_items); This results in Array ( [0] => Array ) This should result in a 6 item array. Any ideas what I'm doing wrong?
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Deleting An Array Item
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Modify Array Item
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Put The Itemid Of An Item Into An Array.
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i have an include file with many arrays that look like this: Code: $event[] = array ('stuff' => 'bla'); $times[] = mktime(0,0,0,6,9,2007); as of right now, I am using asort to sort all of these by date and display them as a list.
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Item In A Multidimensional Array
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Extra Item In My Array
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Trying to build a small simple shopping cart and I am having difficulty getting the solution. The cart is displaying each product, but it is overwriting the values. So if I have added 10 products, it shows ten items, but each item has the values of the last product I added. I think that this may be due to me trying to use a key to store both an array and string at once, but Iam not sure. I have looked at other examples but due to different methods, syntax is throwing me off. Code:
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When I call the Ebays XML API I get an array or something similar back (see the code sample), is it possible to "select item_id where item_id = 123123" or something similar as in MySQL? If, How can I do that? Also, I need to attach a PHP variables to the row I selected as for example $starttime, $endtime and so on. Here is the code sample (the end of the scritpt); PHP Code: ....
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I am currently storing a set of objects inside an array, $itemlist = array(); $itemlist[] = new item("myitem"); //... and I am looking to develop a search function, which returns a reference to the found item. function &search_item($itemlist,"myitem") { //... } I am trying to figure out how to obtain a reference to a given item in an array. Indeed, foreach() and each() seem to work on copies of the data in the array. For example: $array = array("a","b","c","d"); print_r($array); foreach($array as $v) $v="xxx"; print_r($array); // $array is unchanged reset($array) ; while(list(,$v)=each($array)) $v="xxx"; print_r($array); // $array is unchanged, again
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Deleting A Single Item From The Middle Of An Array?
I have an array that contain objects, I want to be able to test against the id of that object and remove it from the array. In it's simplest for I want to go from this: $people = array('Tom', 'Dick', 'Harriet', 'Brenda', 'Jo'); ...to this... $people = array('Tom', 'Dick', 'Brenda', 'Jo'); The fact that the items in the array are objects should not matter right? Plus I've already written my loops and conditionals to check which item i need to remove. function removeItem ( $item ) { $len = count ( $_SESSION['basket_arr'] ) ; if ( $len == 1 ) { emptyBasket ( ) ; } else { for ( $i = 0 ; $i < $len ; $i++ ) { if ( $item->id == $_SESSION['basket_arr'][$i]->id ) { //$_SESSION['basket_arr'][$i] must go } } }}
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Im trying to make a script that randomly generates 4 numbers from an array, without duplicates. I have the random generation done, but i cant figure out how to get rid of duplicates. Code:
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Random Subarray From An Array
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Can i select a specific order (not a sort but a particular order) rather than this random order that is generated (and returned by $new_arr) in the code:
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Random Pair From An Array
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ive got an arrey: $Avail_Questions[]....... and i want to selet a random element, buti want to save the key with it. im using shuffle() and it rnaodmizes the keys and the values....... so how can i save the key? i had trouble with array_rand(), but im happy to go back to it.
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I'm trying to pull links from a file display on my page bottoms using a PHP script... The problem is the random variable(link url) keeps repeating... Code:
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I want to display 4 images (but with possibility of more in future) on a page which are randomly selected from a number of possible images. at the moment I have each possible image as a list in an array, and have found it simple enough to generate the 4 images randomly. The problem I am having is that I don't want the same image to appear more than once, and am having trouble doing this. As I said, I am new to PHP so I have a lot to learn, but I have built a (fairly basic, admitedly) application in AppleScript on a mac, so I am familiar with many of the basic concepts behind programming, and I could do what I want in AppleScript, but am having trouble translating it to PHP, plus it's been a while since I did that anyway. Code:
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Select 4 Results At Random From Array
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Random Element From Associative Array
I've got an associative array named $pictures. I've got there filenames for example: "picabc.jpg" I want to randomize this array. Hmmm... Maybe you will see, what I mean on example: I wanna do something like: drawOneOfElementsIntoVariable($picture); echo("<img src="$picture" />");
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Random Echo Array Elements
I have something like this: $colors=array("red", "blue"); And I want to randomly echo one of the things in the array. But let's say I want it to be more likely for it to be red than blue. I guess I could put red into the array twice, but is there a quicker way.
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Selecting A Random Element From An Array?
something like the following: while(empty($Var_Name)) { DO STUFF} the reason is that im selecting a random element from an array and puting it into another rarray, but if it isnt valid or doesnt select the element, then itll repeat.
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Array Sorting - Select A Random
If I have an array that has maybe 50 things in it, I want to select a random sample of say 5 things. So I know I can use sort() but I want the results to be completely random and not just the top 5 or something in the middle. Can anyone help me do that?
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Retrieve Array Subset In Random Order
Anyone have a clever way to retrieve for example, items 0-29 from an array of size N>29, in random order? The catch is that I dont want to print any items more than once and I dont want to miss any. This is for a tag cloud where I have sorted them by popularity but now I need to display only the top 30. I do this now but they are in order of popularity and its not really a 'cloud'. If I could retrieve the top 30 in some random order, it would look better.
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Iterator First Item?
Let's say I have the code: foreach($data as $row) { do something with each $row } Is there a way to do something specific to the first item iterated? Pseudocode: foreach($data as $row) { if first time through iteration do something with $row else do something which each remaining $row } Is this possible? I think I could use a regular 'for' loop, using the length of the $data array as a guide, and then an 'if..else' structure to see if it is the first time through the 'for' loop, but I was looking for a more elegant solution.
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Trying To Split The Item...
I'm trying to make a search thru my mySQL database, so it any keywords are found then I'm adding the details to the next item in an array that I create. I've tested the array and it is storing the information into the array properly because it echoes out all of the information correctly. My problem is that, at the beginning of each item in the array I have information that tells me what part of the database it was pulled from and the id number and also how many times the a keyword was found in that specific database entry. So you have something like this.. Code:
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Get Last Item In URL String
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Most Recent Item
I have a table with every post in - which has a column for the time the post was created and a column for the thread that this post is located in. My threads table has a column for which forum this thread is in and a column for whether the thread is a sticky or not. On the forum display page, I'd like to display every thread that is in that forum, but ordering them so that any Sticky threads show first (ordered by date created), and then the non-sticky threads are displayed after those ordered according to the time of the most recent post within that thread.
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