I have an array with different first indexes.
Now, I want to read all client_created strings without using $array[688]["client_created"], $array[690]["client_created"] ...
How can I read all these client_created strings without using these numbers like 688, 690, 695, 700 etc.?
This is how it looks like:
Array
(
[688] => Array
(
[client_created] => 1393324278
)
[690] => Array
(
[client_created] => 1393440457
)
)
That was only 2 examples, in practice, I have over 500 items.
Foreach will parse over the entire array.
foreach($myarray as $index=>$subarray)
echo $subarray['client_created']."\n";
Probably best for you would be to catch all those strings through foreach:
$values=array();
foreach($yourArray as $index => $clientCreatedArray)
{
$values[] = $clientcreatedArray["client_created"];
}
Let me know if this works for you.
Related
I have a post array and need to create a new array format from this to store in database with batch insert. I have achieved it with the following code. But want a better solution (if any) to achieve my array. I wanted to eliminate the inner loop but did not get any solution. Please provide any suggestion on how can I achieve this.
Code to parse array:
if ($this->input->post()) {
foreach ($this->input->post() as $key => $value) {
$i = 0;
/* need to eliminate this loop */
foreach ($value as $k => $v) {
$postData[$i][$key] = $v;
$i++;
}
}
}
Input array:
Array
(
[category_id] => Array
(
[0] => 1
[1] => 4
)
[pay_type_id] => Array
(
[0] => 2
[1] => 5
)
[frequency_id] => Array
(
[0] => 3
[1] => 6
)
)
Output array;
Array
(
[0] => Array
(
[category_id] => 1
[pay_type_id] => 2
[frequency_id] => 3
)
[1] => Array
(
[category_id] => 4
[pay_type_id] => 5
[frequency_id] => 6
)
)
If you really want to, you can do this without loops at all:
$input = $this->input->post();
$keys = array_keys($input);
$postData = [
array_combine($keys, array_column($input, 0)),
array_combine($keys, array_column($input, 1)),
];
This will give the same $postData output as your example, assuming that the input only has keys 0 and 1 in the inner arrays, as it does in your example. If the number of possible elements in the inner arrays is unknown, then you may need to introduce a loop on that, but the secondary loop can still be avoided.
I had to use array_combine() as well as array_column() as array_column() on it's own does not preserve the named keys the your top level of your array.
Other solutions using array_map() or array_walk() may also exist.
However, while it's short and concise, it isn't exactly clear for a reader to understand what it's doing, so unless you document it clearly, you'll be creating a maintenance headache for yourself in the long term.
The double-loop is a more readily understandable solution, pretty standard, and won't cause you any issues. So while I've given you a solution, I would actually recommend just using the code you've got.
Because you have two arrays, a:"records" and b:"fields" in any case, theoretically, you need to have at least two loops to populate the "records" and "fields" inside a record. And, basically, this is not a bad approach or a problem.
If you really want just one loop, because of faith reasons, you need to put a hard-coded list of field assignments in first loop that populate the records.
The only way I can see to do it without a second array is like this:
$arr = array("category_id" => array(1, 4), "pay_type_id" => array(2, 5), "frequency_id" => array(3, 6));
foreach ($arr as $key => $value) {
$postData[0][$key] = $value[0];
$postData[1][$key] = $value[1];
}
print_r($postData);
But you lose flexibility with this approach, because you have to know in advance how many indexes there will be in the inner arrays. The only way to make it generic enough to cope with changes in data is to use an inner loop similar to how you did it originally.
There's nothing much wrong with your original code, it's a pretty standard and reasonable approach to changing the array format in this scenario. It shouldn't give you any particular performance issues, even with fairly large arrays, and there's not really any neater way to approach it.
As per your ouput you need second loop also. But yes you can eliminate use of $i you can use $k instead.
You can change your code as:
if ($this->input->post()) {
foreach ($this->input->post() as $key => $value) {
foreach ($value as $k => $v) {
$postData[$k][$key] = $v;
}
}
}
DEMO
I'm getting started with PHP and I have some troubles finding a way to output values from multiples arrays sent from an external site.
I did a foreach and the code that is printed looks like this :
Array
(
[id] => 1
[title] => Title 1
)
Array
(
[id] => 2
[title] => Title 2
)
Array
(
[id] => 3
[title] => Title 3
)
Any idea how I could get every id (1,2,3) in an echo?
Let me know if you need more informations!
Thanks a lot!
If you just want to echo all the id's in all the arrays, a simple solution would be:
foreach ([$array1, $array2, $array3] as $arr) {
echo $arr['id'];
}
A better solution would probably to create one main array first:
$mainArray = [];
and every time you get a new array, you just push them to the main array:
$mainArray[] = $array1;
$mainArray[] = $array2;
// ... and so on
Then you'll have a multi dimensional array and can loop them with:
foreach ($mainArray as $arr) {
echo $arr['id'];
}
Which solution that works best depends on how you get the arrays and how many they are.
Note: Using array_merge() as others have suggested will not work in this case, since all the arrays have the same keys. From the documentation on array_merge(): "If the input arrays have the same string keys, then the later value for that key will overwrite the previous one."
As you can do:
$array = array_merge_recursive($arr1, $arr2, $arr3);
var_dump($newArray['id']);
echo implode(",", $newArray['id']);
A demo code is here
As a newbie, does anyone have any good tutorials to help me understand different levels of an array? What I'm trying to learn is how to echo different levels, e.g. here is the output array:
Array
(
[meta] =>
Array
(
[total_record_count] => 1
[total_pages] => 1
[current_page] => 1
[per_page] => 1
)
[companies] =>
Array
(
[0] =>
Array
(
[id] => 291869
[url] => https://api.mattermark.com/companies/291869
[company_name] => gohenry.co.uk
[domain] => gohenry.co.uk
)
)
[total_companies] => 1
[page] => 1
[per_page] => 1
)
And here is the code to parse the array:
foreach($jsonObj as $item)
{
echo $item['total_companies'];
}
I'm really struggling to find the structure and how to output each items, e.g. tried things like:
echo $item[0]['total_companies'];
echo $item['companies'][0]['id'];
Any help or pointers would be greatly received.
Well, Lets start, You have a multi-dimensional array. For a multi-dimensional array you need to use looping e.g: for, while, foreach. For your purpose it is foreach.
Start with the array dimension, Array can be multi-dimension, Like you have multi-dimension. If you have an array like below, then it is single dimension.
array(
key => value,
key2 => value2,
key3 => value3,
...
)
Now, How can you know what is a multi-dimension array, If you array has another array as child then it is called multi-dimensional array, like below.
$array = array(
"foo" => "bar",
42 => 24,
"multi" => array(
"dimensional" => array(
"array" => "foo"
)
)
);
Its time to work with your array. Suppose you want to access the value of company_name, what should you do?? Let your array name is $arr.
First you need to use a foreach loop like:
foreach($arr as $key => $val)
The keys are (meta, companies, total_companies...), they are in the first dimension. Now check if the key is company_name or not, if it matches than you got it. Or else you need to make another loop if the $val is an array, You can check it using is_array.
By the same processing at the last element your loop executes and find your value.
Learning
Always a good idea to start with the docs:
arrays: http://php.net/manual/en/language.types.array.php
foreach: http://php.net/manual/en/control-structures.foreach.php
As for tutorials, try the interactive tutorial over at codecademy: https://www.codecademy.com/learn/php
Unit 4 has a tutorial on arrays
Unit 11 has a lesson on advanced arrays.
Your code
As for your code, look at the following which I will show you your array structure and how to access each element. Perhaps that will make things clearer for you.
So lets say your array is named $myArray, see how to access each part via the comments. Keep in mind this is not php code, I'm just showing you how to access the array's different elements.
$myArray = Array
(
// $myArray['meta']
[meta] => Array (
// $myArray['meta']['total_record_count']
[total_record_count] => 1
// $myArray['meta']['total_pages']
[total_pages] => 1
// $myArray['meta']['current_page']
[current_page] => 1
// $myArray['meta']['per_page']
[per_page] => 1
)
// $myArray['companies']
[companies] => Array (
// $myArray['companies'][0]
[0] => Array (
// $myArray['companies'][0]['id']
[id] => 291869
// $myArray['companies'][0]['url']
[url] => https://api.mattermark.com/companies/291869
// $myArray['companies'][0]['company_name']
[company_name] => gohenry.co.uk
// $myArray['companies'][0]['domain']
[domain] => gohenry.co.uk
)
)
// $myArray['total_companies']
[total_companies] => 1
// $myArray['page']
[page] => 1
// $myArray['per_page']
[per_page] => 1
)
As for your for each loop
foreach($jsonObj as $item)
{
echo $item['total_companies'];
}
What the foreach loop is doing is looping through each first level of the array $jsonObj, so that would include:
meta
companies
total_companies
page
per_page
Then within the curly braces {} of the foreach loop you can refer to each level by the variable $item.
So depending on what you want to achieve you need to perhaps change your code, what is it you're trying to do as it's not really clear to me.
As for the code within the loop:
echo $item['total_companies'];
It won't work because you're trying to access an array with the index of total_companies within the first level of the $jsonObj array which doesn't exist. For it to work your array would have to look like this:
$jsonObj = array (
'0' => array ( // this is what is reference to as $item
'total_companies' => 'some value'
)
)
What you want to do is this:
foreach($jsonObj as $item)
{
echo $jsonObj['total_companies'];
}
As for your final snippet of code:
echo $item[0]['total_companies'];
Answered this above. Access it like $jsonObj['total_companies'];
echo $item['companies'][0]['id'];
If you want to loop through the companies try this:
foreach($jsonObj['companies'] as $item)
{
// now item will represent each iterable element in $jsonObj['companies]
// so we could do this:
echo $item['id'];
}
I hope that all helps! If you don't understand please make a comment and I'll update my answer.
Please take a look in to here and here
Information about php arrays
Try recursive array printing using this function:
function recursive($array){
foreach($array as $key => $value){
//If $value is an array.
if(is_array($value)){
//We need to loop through it.
recursive($value);
} else{
//It is not an array, so print it out.
echo $value, '<br>';
}
}
}
if you know how deep your array structure you can perform nested foreach loop and before every loop you have to check is_array($array_variable), like :
foreach($parent as $son)
{
if(is_array($son))
{
foreach($son as $grandson)
{
if(is_array($son))
{
foreach($grandson as $grandgrandson)
{
.....
......
.......
}
else
echo $grandson;
}
else
echo $parent;
}
else
echo $son;
}
hope it will help you to understand
I want to get all the array data where keys has the characters 'ch' from the start. How do I get it?
Array ( [editpostid] => 0 [editpostcat] => 1 [ch114] => on [ch115] => on )
The keys of the data may vary as the numbers come from the record id's from the database.
how do I place all the data with 'ch' in the start of keys on to a separate array?
Do like this
<?php
$arr = array('ch'=>10,'abch'=>20,'ch23'=>45);
$newarr=array();
foreach($arr as $k=>$v)
{
if(substr(strtolower($k),0,2)=='ch')
{
array_push($newarr,$v); // Make use of this if you just need the values
//$newarr[$k]=$v; // Uncomment this and comment above statement, if you need the keys too
}
}
print_r($newarr);
OUTPUT:
Array
(
[0] => 10
[1] => 45
)
$charray=array();
foreach($yourarray as $key=>$value){
if(preg_match("/^ch/",$key)){
$charray[$key]=>$value;
}
}
//$charray is the new arrayas you asked for
echo implode(',',$charray);
refer official documentation for preg_match for more information
I have two arrays named rows and contacts.
The first array rows is like :
Array
(
[0] => email#gmail.com
[1] => test#gmail.com
[2] => tester#gmail.com
[3] => vin#gmail.com
)
The second array contacts is as :
Array
(
[test#gmail.com] => test#gmail.com
[ram#gmail.com] => Ram
[vin#gmail.com] => Vinay
[man_test#yahoo.com] => Manoj
[homan#rediffmail.com] => Homan
)
What I want is the contacts array to be as :
Array
(
[ram#gmail.com] => Ram
[man_test#yahoo.com] => Manoj
[homan#rediffmail.com] => Homan
)
Edit
I tried some functions like array_diff(), array_keys() etc. but they are not giving me the desired output, may be I am not able to use them correctly....!
I don't want to use loop for this purpose because the given arrays are only sample data but in real they are very huge.
Please help.....
Thanks in Advance.....
Another way:
$contacts = array_diff_key($contacts, array_flip($rows));
Assuming I understand the question correctly, you could do that:
for ($i = 0; $i < count($rows); $i++) {
$s = $rows[$i];
unset($contacts[$s]);
}
foreach ($contacts as $email => $name) {
if (!in_array($email, $rows)) {
$contact[$email] = $name;
}
}
The new array is $contact, not $contacts, as your question asked for before you edited it.
As Felix Kling and Dan Grossman's answers will work on the examples you have shown, you probably have whitespace issues like newlines in your data, especially if you have extracted it from a file. So, extending Felix's answer:
$contacts = array_diff_key(array_map('trim', $contacts), array_flip(array_map('trim', $rows)));
You could probably make it more efficient by constructing your data correctly in the first place, but this should do the trick.
http://codepad.org/RIvLbyJy