This is the php code:
$slavesites = array(
'Category1' => array('Anchor1', 'http://www.test1.com'),
'Category2' => array('Anchor2', 'http://www.test2.com')
);
foreach($slavesites as $category => $slavesite){
echo $category;
foreach($slavesite as $anc => $url){
echo $anc.'<br>';
echo $url.'<br>';
}
}
The problem is when I run the code, i get a "0" and "1":
Category10 **--- WHERE DOES THE 0 COME FROM?**
Anchor1
1 **---- WHERE DOES THE 1 COME FROM?**
http://www.test1.com
Category20 --- WHERE DOES THE 0 COME FROM?
Anchor2
1 ---- WHERE DOES THE 1 COME FROM?
http://www.test2.com
Ty!:)
Hope you can help...
second foreach iterates over array without proper indices set. that way default indices (0,1,2,...) are used and hence the number in output.
e.g. actually your definition is like this:
$slavesites = array(
'Category1' => array(0 => 'Anchor1', 1 => 'http://www.test1.com'),
'Category2' => array(0 => 'Anchor2', 1 => 'http://www.test2.com')
);
you should use 'list' instead of 'foreach' in the inner loop:
list($anc, $url) = $slavesite;
If you want to loop through your array like that, you have to store the elements as key-value pairs:
$slavesites = array(
'Category1' => array('Anchor1' => 'http://www.test1.com'),
'Category2' => array('Anchor2' => 'http://www.test2.com')
);
The 0 and the 1 are shown because you don't have keys defined and it therefores uses numerical keys.
Related
Trying use array_unique but this did not help, since not all fields are repeated for me.
My array:
'Rows' =>
array (
0 =>
array (
'HotelId' => 94852,
'OfferId' => 858080496,
'OfferIdStr' => '858080496',
'Price' => 2762,
),
1 =>
array (
'HotelId' => 94852,
'OfferId' => 858080497,
'OfferIdStr' => '858080497',
'Price' => 3000,
),
And my try:
$allHotels['Rows'] = array_unique($allHotels['Rows'], SORT_REGULAR);
Changed flags, didn't help either (SORT_NORMAL, etc...).
It deletes absolutely everything, i need to ignore the HotelId replay, only first need.
If you want to delete duplicated entries based solely on the HotelId value, it's probably easiest just to iterate over the array, storing the seen HotelId values and deleting the current entry if it's HotelId value has already been seen.
$seenHotels = array();
foreach ($allHotels['Rows'] as $key => $hotel) {
if (in_array($hotel['HotelId'], $seenHotels)) {
unset($allHotels['Rows'][$key]);
}
else {
$seenHotels[] = $hotel['HotelId'];
}
}
print_r($allHotels);
Demo on 3v4l.org
Short: Is there a way to get a named key/value from SUBARRAY without knowing the main key ?
Long:
Ive got a foreach loop that extracts text-files & turns them into individual / single arrays (resetting the array between each file)...
example:
Array
(
[Blah Blah] => Array
(
[number] => 10
[name] => nameBlah
[image] =>
)
)
Array
(
[pinkblue597] => Array
(
[number] => 18
[name] => nameBlah68
[image] =>
)
)
(the 1st part to turn into array is used by multiple parts of a process so I dont want to add unnecessary code)
I want to extract the value of "name" and "number", however I do not know the value / format of the key in advance.. - Example: pinkblue597
If I do print_r, I do see the array as I want...
print_r($found,true)."\n";
but if I do this, $name=$found[0]; I get no results for "$name"...
or
if I do this, $name=$found[0]["name"]; I get no results for "$name"...
I could do this via a foreach loop, but it seems inefficient...
PS there will only be ONE (unknown) key in this array, & a sub-array. The sub array is always the same.
Edited: made the code easier to see (forgot to do this)
If the array formation is going to be the same all the time...
then a (nested) foreach loop will suffice, take the example below,
<?php
$a = [
'somethingUnknown13582563' => [
'name' => 'name',
'number' => 15
],
'somethingUnknown2' => [
'name' => 'another name',
'number' => 24
]
];
foreach ($a as $key => $subArray) {
foreach ($subArray as $subKey => $value) {
echo $subArray[$subKey] . '<br>';
}
}
?>
Output
name
15
another name
24
Or...
You could use array_values,
<?php
$a = [
'somethingUnknown13582563' => [
'name' => 'first name',
'number' => 15
],
'somethingUnknown2' => [
'name' => 'name',
'number' => 24
]
];
$a = array_values($a);
echo $a[0]['name'];
?>
Which would turn the first associative array in to numeric indexes and would like so,
array(
0 => array(
'name' => 'first name',
'number' => 15,
),
1 => array(
'name' => 'name',
'number' => 24,
)
)
I'm not sure why you're creating a nested array in the first place if you only intend to discard it immediately, but since the array only appears to have a single element, and you only care about that element, you can simple use array_pop
$a = [
'somethingUnknown13582563' => [
'name' => 'first name',
'number' => 15
],
];
$data = array_pop($a);
echo $data['name']; // gives you 'first name'
Note that array_pop is destructive. So if you don't want this behavior you could use something like end instead.
$data = end($a); // same effect as array_pop but non-destructive
echo $data['name']; // also gives you 'first name'
With that said, the foreach construct isn't necessarily inefficient. I believe your true concern is around finding a simpler way to dereference the nested array. The easiest way to do that in your case is going to be using something like end($a)['name'] which gives you the kind of straight-forward dereferencing you're looking for.
You can use array_map() to achieve this...
array_map — Applies the callback to the elements of the given arrays. This will loop all the array elements through callback function and you can print each element present in the sub array..
<?php
$myArry = array(
'Blah Blah' => array(
'number' => 10,
'name' => 'Blah Blah 1',
),
'pinkblue597' => array(
'number' => 15,
'name' => 'Blah Blah 2',
)
);
array_map(function($arr){
echo 'Name : '.$arr['name'].'<br>';
echo 'Number : '.$arr['number'].'<br>';
},$myArry);
?>
This will give you :
Name : Blah Blah 1
Number : 10
Name : Blah Blah 2
Number : 15
Working with an array file with following structure. I know there are additional arrays that need to be inserted under each array 'color'.
$items=array (
0 =>
array (
'color' => 'category_a',
),
1 =>
array (
'book' => 'Gone With The Wind',
'movie' => 'GWTW',
'id'=> 'A100'
),
2 =>
array (
'book' => 'Goldfinger',
'movie' => 'GF',
'id'=> 'A103'
),
3 =>
array (
'color' => 'category_b',
),
4 =>
array (
'book' => 'Across The Great Dvide',
'movie' => 'ATGD',
'id'=> 'B102'
),
5 =>
array (
'book' => 'Goldfinger',
'movie' => 'GF',
'id'=> 'B103'
),
);
Once this array is created, I am using a list to loop thru to verify that each value in the list is placed in each 'color' array as follows
foreach ($controllist as $key=>$value){
foreach($items as $item){
if(in_array($value['book'],$item){
echo "PRESENT IN ARRAY"."<BR>";
}else{
echo "INSERT INTO ARRAY HERE"."<BR>";
}
}
}
For simplicity my controllist looks like
Gone With The wind
Across The Great Divide
Goldfinger
Once complete I should end up with the info for Across The Great Divide inserted into 'color'=> 'category a' as the [2] with Goldfinger moving down one. In 'color'=>category_b' the first array should be Gone With The Wind. Any of the 'color' arrays could be missing an array at any position. To sum it up, need to check for the existence of a value from the list, if not present insert into the array. Other than using the foreach loops shown is there an easier way of doing this? If not how can I get the information inserted into the proper position?
Thanks
EDIT:
I believe the question may not be clear. What I need to do is check for the existence of one array in another. If the value in conrollist is not present in the array, insert an array into the array according the position in the conrollist. The inserted array will have the same structure as the others (I can take care of this part). I am having trouble determining if it exist and if not inserting it. Hope this helps
You might want to be using a for loop instead so you have a pointer on each iteration in order to determine where you are in the array.
foreach($items as $item){
for($i = 0; $i < count($controllist); $i++) {
if(in_array($controllist[$i]['book'],$item){
echo "PRESENT IN ARRAY AT POS ".$i."<BR>";
}else{
$controllist[$i]['book'] = $yourvar;
echo "INSERT INTO ARRAY HERE"."<BR>";
}
}
}
I have a variable number of multidimensional arrays but all with the same 4 possible values for each item.
For example:
Array
(
[companyid] => 1
[employeeid] => 1
[role] => "Something"
[name] => "Something"
)
but every array may have a different ammount of items inside it.
I want to turn all the arrays into one single table with lots of rows. I tried array_merge() but I end up with a table with 8, 12, 16... columns instead of more rows.
So... any ideas?
Thanks
Didn't test it, but you could try the following:
$table = array();
$columns = array('companyid' => '', 'employeeid' => '', 'role' => '', 'name' => '');
foreach($array as $item) {
$table[] = array_merge($columns, $item);
}
This should work since the documentation about array_merge say:
If the input arrays have the same string keys, then the later value
for that key will overwrite the previous one.
So you either get the value of the current item or a default value that you can specify in the $columns array.
$array1=Array
(
"companyid" => 1,
"employeeid" => 4,
"role" => "Something",
"name" => "Something",
);
$array2=Array
(
"companyid" => array(2,2,2),
"employeeid" => 5,
"role" => "Something2",
"name" => "Something2"
);
$array3=Array
(
"companyid" => 3,
"employeeid" => 6,
"role" => "Something3",
"name" => "Something3"
);
//Using array_merge
$main_array["companyid"]=array_merge((array)$array1["companyid"],(array)$array2["companyid"],(array)$array3["companyid"]);
$main_array["employeeid"]=array_merge((array)$array1["employeeid"],(array)$array2["employeeid"],(array)$array3["employeeid"]);
for($i=0;$i<count($main_array["companyid"]);$i++)
echo $main_array["companyid"][$i] + "<br />";
for($i=0;$i<count($main_array["employeeid"]);$i++)
echo $main_array["employeeid"][$i] + "<br />";
I've tested the code above and seems right.
You coult also improve this code into a DRY function.
I would like to retrieve the first key from this multi-dimensional array.
Array
(
[User] => Array
(
[id] => 2
[firstname] => first
[lastname] => last
[phone] => 123-1456
[email] =>
[website] =>
[group_id] => 1
[company_id] => 1
)
)
This array is stored in $this->data.
Right now I am using key($this->data) which retrieves 'User' as it should but this doesn't feel like the correct way to reach the result.
Are there any other ways to retrieve this result?
Thanks
There are other ways of doing it but nothing as quick and as short as using key(). Every other usage is for getting all keys. For example, all of these will return the first key in an array:
$keys=array_keys($this->data);
echo $keys[0]; //prints first key
foreach ($this->data as $key => $value)
{
echo $key;
break;
}
As you can see both are sloppy.
If you want a oneliner, but you want to protect yourself from accidentally getting the wrong key if the iterator is not on the first element, try this:
reset($this->data);
reset():
reset() rewinds array 's internal
pointer to the first element and
returns the value of the first array
element.
But what you're doing looks fine to me. There is a function that does exactly what you want in one line; what else could you want?
Use this (PHP 5.5+):
echo reset(array_column($this->data, 'id'));
I had a similar problem to solve and was pleased to find this post. However, the solutions provided only works for 2 levels and do not work for a multi-dimensional array with any number of levels. I needed a solution that could work for an array with any dimension and could find the first keys of each level.
After a bit of work I found a solution that may be useful to someone else and therefore I included my solution as part of this post.
Here is a sample start array:
$myArray = array(
'referrer' => array(
'week' => array(
'201901' => array(
'Internal' => array(
'page' => array(
'number' => 201,
'visits' => 5
)
),
'External' => array(
'page' => array(
'number' => 121,
'visits' => 1
)
),
),
'201902' => array(
'Social' => array(
'page' => array(
'number' => 921,
'visits' => 100
)
),
'External' => array(
'page' => array(
'number' => 88,
'visits' => 4
)
),
)
)
)
);
As this function needs to display all the fist keys whatever the dimension of the array, this suggested a recursive function and my function looks like this:
function getFirstKeys($arr){
$keys = '';
reset($arr);
$key = key($arr);
$arr1 = $arr[$key];
if (is_array($arr1)){
$keys .= $key . '|'. getFirstKeys($arr1);
} else {
$keys = $key;
}
return $keys;
}
When the function is called using the code:
$xx = getFirstKeys($myArray);
echo '<h4>Get First Keys</h4>';
echo '<li>The keys are: '.$xx.'</li>';
the output is:
Get First Keys
The keys are: referrer|week|201901|Internal|page|number
I hope this saves someone a bit of time should they encounter a similar problem.