I'm using a SESSION variable to hold items added to an ingredients page. I'm wondering how I can uniquely identify each key in the array.
I'm adding ingredients via the following and it's working fine.
$_SESSION['ingredients'][] = array($_POST['ingredient'],$_POST['qty']);
If I stick a few ingredients in there and print the array I get..
Array ( [0] => 1 [1] => 50 ) Array ( [0] => 2 [1] => 50 ) Array ( [0] => 3 [1] => 50 )
Where 1, 2 and 3 are the ingredient IDs.
I can remove ingredients from the array based on their ID no problem, but if I put the same ingredient in twice I won't be able to distinguish between them. I was wondering if I can add an incremental number to ID the key?
Each of the items in $_SESSION['ingredients'] already has a unique index (starting from 0 in your case). When you print your $_SESSION['ingredients'] array, you should get this:
Array ( [0] => Array ( [0] => 1 [1] => 20 ) [1] => Array ( [0] => 2 [1] => 20 ) [2] => Array ( [0] => 1 [1] => 10 ) )
Notice that each array combination has an index preceding it (starting at 0)
The following code demonstrates this:
<?php
session_start();
unset($_SESSION['ingredients']);
$_SESSION['ingredients'][] = array(1, 20);
$_SESSION['ingredients'][] = array(2, 20);
$_SESSION['ingredients'][] = array(1, 10); // adding the same ingredient again
print_r($_SESSION['ingredients']);
?>
Why not use the ingredient id as the key in the session array and then append each value to it as an element
$_SESSION['ingredients'][$_POST['ingredient']][] = $_POST['qty'];
This would give you
Array(
[1] => array(
[0] => 50,
[1] => 50
)
)
Just a thought, I don't know if this would work for your use case
change your inserted array to this:
$_SESSION['ingredients'][count($_SESSION['ingredients'])] = array($_POST['ingredient'],$_POST['qty']);
I use it in my program.
Related
i have two arrays :-
$a1=array(1,1,2,3,1);<br>
$a2=array("m","m","s","xl","s");
i want this as output what should i do :-
Array
(
[0] => Array
(
[0] => 1
[1] => m
[2] => 2 //this is count of m
)
[1] => Array
(
[0] => 1
[1] => s
[2] => 1 //this is count of s
)
[2] => Array
(
[0] => 2
[1] => s
[2] => 1 //this is count of s
)
[3] => Array
(
[0] => 3
[1] => xl
[2] => 1 //this is count of xl
)
)
You could do this by looping over your input arrays, and directly putting an element [1, m, 1] into your result array based on the first set of values ($a1[0] and $a1[0]). Then in the next round, you would have to check if your result array already contains an item with the current product id and size - if so, you increment the counter there, if not, you need to create a new element. But checking if such an item already exists is going to be a bit painful then, because basically you would have to loop over all existing items each time again to do so.
I prefer to go with a different, temporary structure first to gather the necessary data, and then transform it into the desired result in a second step.
$a1=array(1,1,2,3,1);
$a2=array("m","m","s","xl","s");
$temp = [];
foreach($a1 as $index => $product_id) {
$size = $a2[$index];
// if an entry for given product id and size combination already exists, then the current
// counter value is incremented by 1; otherwise it gets initialized with 1
$temp[$product_id][$size] = isset($temp[$product_id][$size]) ? $temp[$product_id][$size]+1 : 1;
}
That gives a $temp array of the following form:
array (size=3)
1 =>
array (size=2)
'm' => int 2
's' => int 1
2 =>
array (size=1)
's' => int 1
3 =>
array (size=1)
'xl' => int 1
You see the product id is the key on the top level, then the size is the key on the second level, and the value on the second level is the count for that combination of product id and size.
Now we transform that into your desired result structure:
$result = [];
foreach($temp as $product_id => $size_data) {
foreach($size_data as $size => $count) {
$result[] = [$product_id, $size, $count];
}
}
var_dump($result);
I'm using a form where the pair of inputs can be added per automatic. One store value in select and the other as input
After submit I receive the values in array and I need to associate them together. So all key values [0] belongs together and all [1] and so on.
Array
(
[issue] => Array
(
[0] => 2
[1] => 3
)
[qty] => Array
(
[0] => 1
[1] => 2
)
)
How can I do this using PHP?
Just use a simple foreach loop.
$combined = array();
foreach ($_POST["issue"] as $k=>$v) {
$combined[$k] = array($_POST["issue"][$k], $_POST["qty"][$k]);
}
print_r($combined);
Note, array_chunk is not my solution (It seems to me).
I have an array of about 150.000 elements
Array
(
[0] => Array
(
[name] => Danilo
[phone] => 33568
)
[1] => Array
(
[name] => Alessandro
[phone] => 392222
)
[2] => Array
(
[name] => Alex
[phone] => 3922
)
[3] => Array
(
[name] => Capa
[phone] => 392
)
)
And so on. I would split this array in several arrays, of (for example) 3.000 elements every one.
I saw array_chunk, but it returns a single array with several subarray.
I need several subarray to store them in a database and elaborate in future.
I'm getting crazy to write a snippet starting from that $temp and divide it into smaller array.
$size_chunks = 1;
$temp = array_chunk($recipients, $size_chunks);
foreach ($temp as $key=>$value)
{
if ($key<$size_chunks)
{
$to_store[] = $temp[$key];
}
//print_r($to_store);
// pseudo sql
// INSERT INTO table (sub_recipient) VALUES ($to_store);
$to_store = array();
}
So, every time that for loop end, reduce temp, store $to_store array and restart for others chunks.
Thank you very much.
PS in my example chunk==1 because starting array is small... ;)
With my example of chunk = 1, I need from starting array this 4 arrays:
Array
(
[0] => Array
(
[name] => Danilo
[phone] => 33568
)
)
Array
(
[0] => Array
(
[name] => Alessandro
[phone] => 39222
)
)
Array
(
[0] => Array
(
[name] => Alex
[phone] => 39222
)
)
Array
(
[0] => Array
(
[name] => Capa
[phone] => 392
)
)
Another explain
1 - With a starting array of 15.000 elements, and chunk of 3.000, I need in output (15.000 / 3.000) = 5 arrays. I will save them in database, so in DB I will have 5 rows (a row for every array).
2 - With a starting array of 4 elements, and chunk of 1, I need in output (4 / 1) = 4 arrays. I will save them in database, so in DB I will have 4 rows (a row for every array).
array_chunks() already does what you want, you just have to save it:
$chunks = array_chunk($array, $size_chunks);
foreach ($chunks as $chunk) {
// save $chunk to your database
}
$recipients = Array(
Array("fdbvfdb","dsacsdcds"),
Array("hrloo","dacdsc"),
Array("dcsdc","adcsd"),
Array("dcsdc","adcsd")
);
$total = count($recipients);//count 150.000 elements
$i=1;
for($i=0;$i<$total;$i++){
$O = array_slice($recipients,$i,1);
print_r($O);
//Your insert/Save code
}
you can use this code there is uses Array_Slice
I know this won't take much time for experts here. But still please help me out
My Array output is like this
Array ( [0] => 1 [1] => 37 [2] => 1035 ) 1
Array ( [0] => 1 [1] => 37 [2] => 1035 ) mystatusmessage1
Array ( [0] => 4 [1] => 37 [2] => 2925 ) 2
Array ( [0] => 4 [1] => 37 [2] => 2925 ) mystatusmessage2
What I would like to get it is in a single string value like this so that I can insert into database.
1,37,1035,1,mystatusmessage1
4,37,2925,2,mystatusmessage2
How can I achieve that. I'm trying to do with foreach but still I'm not able to do it.
Thanks,
Kimz
use implode function to make string from array for example
if you have array like Array('a','b','c');
implode(',',array('a','b','c') )
will return a,b,c as string
here first argument is your glue by which you want to join string
Here you go.
// Original array
$array = array(0 => 1, 1 => 37, 2 => 1035);
// $_POST array
$_POST = array(1,'mystatusmessage1');
// Jump to the end of array
end($array);
// Merge the post with original array
$newArr = array_merge($array,$_POST);
// Impode
echo implode(",",$newArr);
Repeat with other array.
Below is a array generated by a query builder.
$random_array = Array ( [0] => Array ( [text] => A great time was had by all! )
[1] => Array ( [text] => KILL SHOT )
[2] => Array ( [text] => How is it possible)
[3] => Array ( [text] => http://www.youtube.com/watch?v=KwGOZpbxU9g )
[4] => Array ( [text] => http://www.youtube.com/watch?v=KwGOZpbxU9g )
)
Currently i am doing like this to print the random value
print_r(array_rand($random_array,1));
This is printing the array key as 3 or 1 etc(random from above array).I want to print the value of the key and not the key.
e.g I want to print the random value like this "http://www.youtube.com/watch?v=KwGOZpbxU9g" or "A great time was had by all!" instead of 3 or 1 which is printing now.
Is it possible to do this.
You will have one more line of code as shown below:
$array_key = array_rand($random_array,1); //get the key
print_r( $random_array[$array_key] ); //use the key to print value
What about simply calling
$randNumber = rand(0,count($random_array))-1; //index in array starts with 0
print (string) $random_array[$randNumber];