I have an associated array who's last elements start with
[0] => value
moving onwards
[1] => value, [2] => value ... etc
But it wont be determined until run time how many elements there will be (1, 2 ,3 etc). So, I am trying to write a script which will pull off those last elements and store them in a separate array for looping. To do this, I will need to know how to point start the pointer at associated array element [0] and then continue until the end of the array.
How can I achieve this?
How about this?
<?php
$array = array("1","2","3","value","more","stuff","here");
if ($foundit = array_search("value",$array)) {
$new_array = array_slice($array,$foundit);
}
print_r($new_array);
Array
(
[0] => value
[1] => more
[2] => stuff
[3] => here
)
I'm assuming that you have control over the code that dynamically generates the elements that need to be added to your array. If this is the case, you can use PHP's array_push() function to append to the end of the existing array.
PHP Manual: array_push
PHP has no pointers, but if you need to iterate over whole array (no matter associative it or not) you can use foreach
like
foreach($array ask $key => $value)
echo $key . ' ' . $value;
Related
Very simplified example:
function returnArray() {
return array('First','Second','Third');
}
$arr = array('hello','world');
$arr[] = returnArray();
print_r($arr);
I was (wrongly) expecting to see $arr containing 5 elements, but it actually contains this (and I understand it makes sense):
Array
(
[0] => hello
[1] => world
[2] => Array
(
[0] => First
[1] => Second
[2] => Third
)
)
Easily enough, I "fixed" it using a temporary array, scanning through its elements, and adding the elements one by one to the $arr array.
But I guess/hope that there must be a way to tell PHP to add the elements automatically one by one, instead of creating a "child" array within the first one, right? Thanks!
You can use array_merge,
$arr = array_merge($arr, returnArray());
will result in
Array
(
[0] => hello
[1] => world
[2] => First
[3] => Second
[4] => Third
)
This will work smoothly here, since your arrays both have numeric keys. If the keys were strings, you’d had to be more careful (resp. decide if that would be the result you want, or not), because
If the input arrays have the same string keys, then the later value for that key will overwrite the previous one. If, however, the arrays contain numeric keys, the later value will not overwrite the original value, but will be appended.
You are appending the resulting array to previously created array. Instead of the use array merge.
function returnArray() {
return array('First','Second','Third');
}
$arr = array('hello','world');
$arr = array_merge($arr, returnArray());
print_r($arr);
I am trying to figure out how to reorganize an array..
I have a multidimensional array(Ill call that original_array) and I would like to take the first array within original_array and set the values as keys in a new array. I also want to take the values of the second array in original_array and make them keys and then set the values of the third array in original_array as the values for those keys.
Here is an example of original_array:
Array (
[id] => Array (
[0] => 1
[1] => 3
)
[reward] => Array (
[0] => Movie
[1] => Trip
)
[cost] => Array (
[0] => 50
[1] => 200
)
)
Basically what I would like to do is look like this:
Array (
[1] => Array (
[Movie] => 50
)
[3] => Array (
[Trip] => 200
)
)
Is there a simple and elegant way to merge these like this?
I have spent hours trying to figure this out using array_merge, array_merge_recursive.. etc. And have search SO far and wide for a similar questions, but I haven't found anything that does what I am after.
I was able to correctly combine the 2nd and 3rd arrays in original_array with array_combine. But, I am at a loss as how to combine that result with the 1st array's values in original_array.
Thanks in advance to any help!
Well, the dirty way would be just use combine array functions like array_combine with the input:
$new_array = array_combine(
$array['id'], // parent keys
// combine chunked combined sub keys :p
array_chunk(array_combine($array['reward'], $array['cost']), 1, true)
);
There may be some incantation of array_*() merging functions that could produce what you're looking for, but it is far easier to just iterate over the original array's [id] sub-array and use its values to create new sub-array keys in a different output array.
// To hold your output
$output = array();
// Iterate the original array's [id] sub-array
foreach ($original['id'] as $idxkey => $newkey) {
// Add a sub-array using $newkey to the output array
$output[$newkey] = array(
// Using the index (not value), retrieve the corresponding reward
// value to use as the new array key
// and corresponding cost to use as the new subarray value
$original['reward'][$idxkey] => $original['cost'][$idxkey]
);
}
Here is a demonstration: https://3v4l.org/2pac3
This should work for you:
First you can get the keys for the main array into a separate variable with array_shift(), which will just remove the first element from your array, which is the array holding the keys.
Then use array_map() to loop through both of your subArrays and use reward as key with the cost values as value and return it in an array. At the end you just have to array_combine() your keys $keys with the new created array.
Code:
<?php
$keys = array_shift($arr);
$result = array_combine($keys, array_map(function($k, $v){
return [$k => $v];
}, $arr["reward"], $arr["cost"]));
print_r($result);
?>
You might wanna take a look at BaseArrayHelper from Yii 2.0 Framework.
Although this file is part of a framework it has only very few dependencies and you should be able to use just this file or parts of it in your code with small modifications.
An example for your use case can be found in the index() method.
I am reading a GEDCOM-formatted family tree flat file, and producing an array from the data for staging into table. If I encounter the values CONC <some value>, then, instead of adding an element, I need to append <some value> to the value of the last element that was just inserted (regardless of dimension depth).
I tried with current(...) etc but does this work for a multidimensional associative array?
please consider following element in an array:
[#N163#] => Array ( [INDI] => Array ( [TEXT] => Some data of this person) )
if the next line reads "1 CONC including his profession"
instead of adding a line as such
[#N163#] => Array (
[INDI] => Array ( [TEXT] => Some data of this person)
[INDI] => Array ( [CONC] => including his profession) )
I would like the array to look as follows:
[#N163#] => Array (
[INDI] => Array ( [TEXT] => Some data of this person including his profession) )
What I have researched thus far:
end($theArray)
to set pointer to last inserted element followed by $theArray[key($theArray)] = .... to update this element.
But I did not get this method to work for multidimensional arrays and/or it became really messy.
And:
merging two arrays using e.g. += notation,
but this only seems to overwrite a new element, not affect the last one, if keys are same
And:
examples with foreach calls, which does not help in my case.
Hope somebody can shed some light... many thanks!
When you adding $array[#N163#][INDI][TEXT] = 'smtng'; you can save position
$pos = &$array[#N163#][INDI][TEXT];
And if you need concatenate, write
$pos .= "concate line";
i have array like
Array
(
[1] => Array
(
[user_info] => Array
(
[id] => 1
[name] => Josh
[email] => u0001#josh.com
[watched_auctions] => 150022 150031
)
[auctions] => Array
(
[150022] => Array
(
[id] => 150022
[title] => Title of auction
[end_date] => 2013-08-28 17:50:00
[price] => 10
)
[150031] => Array
(
[id] => 150031
[title] => Title of auction №
[end_date] => 2013-08-28 16:08:03
[price] => 10
)
)
)
so i need put in <td> info from [auctions] => Array where is id,title,end_date but when i do like $Info['id'] going and put id from [user_info] when i try $Info[auctions]['id'] there is return null how to go and get [auctions] info ?
Try:
foreach( $info['auctions'] as $key=>$each ){
echo ( $each['id'] );
}
Or,
foreach( $info as $key=>$each ){
foreach( $each['auctions'] as $subKey=>$subEach ){
echo ( $subEach['id'] );
}
}
Given the data structure from your question, the correct way would be for example:
$Info[1]['auctions'][150031]['id']
$array =array();
foreach($mainArray as $innerArray){
$array[] = $innerArray['auctions'];
}
foreach($array as $key=>$val){
foreach($val as $k=>$dataVal){
# Here you will get Value of particular key
echo $dataVal[$k]['id'];
}
}
Try this code
Your question is a bit malformed. I don't know if this is due to a lacking understanding of the array structure or just that you had a hard time to explain. But basically an array in PHP never has two keys. I will try to shed some more light on the topic on a basic level and hope it helps you.
Anyway, what you have is an array of arrays. And there is no difference in how you access the contents of you array containing the arrays than accessing values in an array containing integers. The only difference is that what you get if you retrieve a value from your array, is another array. That array can you then in turn access values from just like a normal array to.
You can do all of this in "one" line if you'd like. For example
echo $array[1]["user_info"]["name"]
which would print Josh
But what actually happens is no magic.
You retrieve the element at index 1 from your array. This happens to be an array so you retrieve the element at index *user_info* from that. What you get back is also an array so you retrieve the element at index name.
So this is the same as doing
$arrayElement = $array[1];
$userInfo = $arrayElement["user_info"];
$name = $userInfo["name"];
Although this is "easier" to read and debug, the amount of code it produces sometimes makes people write the more compact version.
Since you get an array back you can also do things like iterating you array with a foreach loop and within that loop iterate each array you get from each index within the first array. This can be a quick way to iterate over multidimensional array and printing or doing some action on each element in the entire structure.
Lets say I end up with an array like such:
Array ( [0] => Array ( [0] => user
[1] => pass
)
)
maybe as a result of passing an array through a function and using func_get_args()
In this case, I would want to get rid of the initial array, so I just end up with:
Array ( [0] => user
[1] => pass
)
I know I could make a function to accomplish this, and push each element into a new array, however, is there some built in functionality with PHP that can pull this off?
$new_array = $old_array[0];
...
array_pop() will pop the last (first, if only 1 is present) element.
Just take the value of the first element of the "outer" array.
I would recommend array_shift as it removes and returns the first element off of the beginning of the array.