I think the best way to explain my question is to give an example. Say I have the following object.
$data=new stdClass;
$data->test=new stdClass;
$data->test->test2=6;
$data->s=array('b',6,7);
I want to know how I can read or change any value in the object given the key value as an array.
I know the below won't work:
function doSomething($inputArray1,$inputArray2) {
$data[ $inputArray1 ]; //6
$data[ $inputArray2 ]=4; //was array('b',6,7);
}
//someone else provided
doSomething( array('test','test2') , array('s') );
Changed to make clear that I do not know the values of the array personally so using
$data->test->test2; to get the 6 like I normally would won't work. Also do not know the array length.
Figured it out:
$parts=array('test','test2');
$ref=&$data;
foreach($parts as $part) {
if (is_array($ref)) {
$ref=&$ref[$part]; //refrence next level if array
} else {
$ref=&$ref->$part; //refrence next level if object
}
}
echo $ref; //show value refrenced by array
$ref=4; //change value refrenced by array(surprised this works instead of making $ref=4 and breaking the refrence)
unset($ref); //get rid of refrence to prevent accidental setting. Thanks #mpyw
As I noted in the comments, you need to access the object/arrays as intended.
Their notations are as follows;
Object: ->
Array: []
So, taking your $data array you've generated, you'd have to access the object/array combination as such:
echo $data->s[2];
Example/Demo
And if you were to access the initial test/test2 itteration (which is set as an object (->)), then you need to access it as an object:
echo $data->test->test2;
Related
I'm receiving this array of objects and need to iterate over it, but the problem is that I need to get the value of the next item when its iterating, to compare the value of the current object with the next one, and if it's a different value, split this array in two.
So, I was doing it with next() php function:
//looking for the next register in the array
$next = next($finances);
//first array if exist different values
$aiuaEd = [];
//second array if exist different values
$aiua = [];
foreach ($finances as $finance) {
if ($finance->cnpj <> $next->cnpj) {
$aiua[] = $finance;
} else {
$aiuaEd[] = $finance;
}
}
This code works fine at some point, but then I got this error:
Trying to get property 'cnpj' of non-object in
I don't know why sometimes works well and sometimes don't, debugging this variables, I found that if my array have 2 objects inside only, when I'm looping over it, the $next->cnpj variable came as empty, and sometimes don't.
Can someone help me with this?
I solved it with a different approach, instead of using php next(), I first loop over this array saving the cnpj's into an array.
$cnpjs = [];
foreach($finances as $finance){
$cnpj[] = $finance->cnpj;
}
Then I use array_unique() to group this 2 differents CNPJ's and sort() to get the correct keys order.
//grouping cnpjs as unique, should exist only 2 keys
$cnpj = array_unique($cnpj);
//sort array keys to get in order
sort($cnpj);
Then I iterate over my $finances array again, but now I'm counting if this $cnpj array has more than 2 positions, which means that I have to split this data in two differents arrays.
foreach($finances as $finance){
if(count($cnpj) > 1){
if($finance->cnpj == $cnpj[1]){
$aiua[] = $finance;
}else{
$aiuaEd[] = $finance;
}
}else{
$aiuaEd[] = $finance;
}
}
I'm pretty sure that this is not the best approach for that problem, or at least the most optimized one, so I'm open for new approach's suggestions!
Just posting how I solved my problem in case anyone having the same one.
Notice that this approach is only usable because I know that will not exist more than 2 different's CNPJ's in the array.
Here is a fairly big object dumped using print_r.
https://docs.google.com/document/d/175RLhWlMQcyhGR6ffGSsoJGS3RyloEqo4EEHCL2H2vg/edit?usp=sharing
I am trying to change the values of the uploaded_files.
Towards the end of that object you'll see something like
[uploaded_files] => Array
(
[attachment] => /home2/magician/public_html/development/testing/wp-content/uploads/wpcf7_uploads/Central-Coast-Montessori-logo.jpg
[attachment2] => /home2/magician/public_html/development/testing/wp-content/uploads/wpcf7_uploads/Andrew.jpg )
My code
// move the attachments to wpcf7ev temp folder
foreach ($cf7ev_object['uploaded_files'] as $key => $uploaded_file_path) {
$new_filepath = WPCF7EV_UPLOADS_DIR . '/' . basename($uploaded_file_path);
wpcf7ev_debug("New file path is {$new_filepath}");
rename($uploaded_file_path, $new_filepath);
wpcf7ev_debug("'{$key}'is the KEY for {$uploaded_file_path}");
wpcf7ev_debug($cf7ev_object['uploaded_files']);
$cf7ev_object['uploaded_files'][$key] = $new_filepath; // this is not updating
}
To loop through it I have been using
foreach ($cf7ev_object->uploaded_files as $key => $uploaded_file_path) {
and this has worked.
But shouldn't it be
foreach ($cf7ev_object['uploaded_files'] as $key => $uploaded_file_path) {
? As '->' is for accessing methods?
And specifically I want to update the values of those uploaded_files, so to do that I need to do
$cf7ev_object['uploaded_files'][$key] = $new_filepath; // this is not updating
? But this doesn't seem to be working.
I think I need to be clear on how to access values in an object.
Thanks.
First of all, regarding the single arrow "->" that is how you reference an objects values. But I won't get into that. Since you say it works, $cf7ev_object is obviously an object.
You say you want to "access the values in the object".
var_dump($cf7ev_object);
This will spit out what is in that object. I gather you are a bit of a newbie, so I will try to help you out best I can with the limited data you provided (you may want to expand your question.
Looping is not a one-shot deal. You can have nested loops and nested loops inside of those. However, it is a resource hog if you're not careful. Here is an exercise that might help you.
$new_array = array();
foreach($cf7ev_object->uploaded_files as $key => $value) {
$new_value = $value;//do something to the $value here
$new_array[$key] = $new_value;
}
//take a look at your work now:
print_r($new_array);
I hope this helps. Note: your google doc is restricted, public can't see it.. And your question is too vague. Let me know if I can help more.
If you want to change the object array values instantly you just set it equal to the above loop result:
$cf7ev_object->uploaded_files = $new_array;
How to, and is it possible to add different value to a variable inside an array, but to simplify it possibly to do it with another array; i need to store processes and their cpu load on my page, but since process names are "ugly", i need to change their name to something normal looking
so far i have managed to extract top 5 of them (mostly the same every time) like this:
$array[0] = "process1";
$array[1] = "process2";
$array[2] = "process3";
Now i want to add as many possibilities as possible to change some prettier values to them
$new_values = array(
"process1" == "Process name as i want it",
"process2" == "Second process"
);
So when i call say $array[1]
i don't get "process2" but changed name ("Second process")
Thanks in advance
You could do something like this, using the value from the first array as the key for the $new_values array:
echo $new_values[$array[1]]; // Second process
Edit: I'll wrap this inside a function to check for the $new_values existence, otherwise fall back to the original value:
function displayPretty($key) {
global $new_values; // get the $new_values array from global scope
if(array_key_exists($key, $new_values))
return $new_values[$key]; // return pretty name if it exists
return $key; // return original value otherwise
}
echo displayPretty($array[1]);
This way, if you pass in $array[1] it will return the value from $new_values if it exists (e.g. Second process in this case), and if it doesn't (e.g. if you passed in $array[5] and that doesn't have a pretty definition in $new_values) it will just return what you passed in.
my returned json looks like this http://pastebin.com/Nbr161s3
I want to echo
body->airTicketListResponse->routings->mainAirlineName
body->airTicketListResponse->routings->adultBasePrice
body->airTicketListResponse->routings->trips->segments->departureAirportCode
body->airTicketListResponse->routings->trips->segments->departureTime //only the time here
body->airTicketListResponse->routings->trips->segments->duration
for each routings.
How do I do this? Here is what I have but I am lost and I know it is way off.
$result = data returned here http://pastebin.com/Nbr161s3
$airTicketListResponse = $result->body->airTicketListResponse;
$routings = $result->body->airTicketListResponse->routings;
$trips = $result->body->airTicketListResponse->routings->trips;
$segments = $result->body->airTicketListResponse->routings->trips->segments;
foreach($airTicketListResponse as $item){
$i=0;
$i<count($routings);
echo '<span style="font-weight:bold;">Airline - '.$item->routings[i]->mainAirlineName.' Price - '.$item->routings[i]->adultBasePrice.'</span><br />'.$item->routings[i]->trips[i]->segments[i]->departureAirportCode.' '.$item->routings[i]->trips[i]->segments[i]->departureTime.'<br /><br />';
$i++;
}
Please help if you can.
Before working with JSON you should be familiar with working with arrays and objects since JSON is nothing more than that.
It seems you already know these two concepts
To access an object property in PHP you use obj->property
To access a value of an array you specify the index inside brackets array[0]
With JSON you just have to keep in mind that some of your object properties will be arrays.
Now, since your data comes in a multi-level three-like structure you should also be familiar with traversing arrays, PHP offers an implementation of a foreach loop that is ideal for traversing dynamically generated arrays
using foreach($array as $index => $var) the $index and $var variables are automatically set to the index and value of each element in the array as they are being traversed, so you don't manually need to keep track of the index (i.e. $i)
Now let's start going through your data:
First we find your routings array
$result = json_decode($data);
$airTicketListResponse = $result->body->airTicketListResponse;
$routings = $airTicketListResponse->routings;
Now we use foreach to loop through every routing and print the needed properties
foreach($routings as $routing){ //$routing will hold the object value in each loop
echo 'Airline '.$routing->mainAirlineName.'<br>';
echo 'Adult Base Price '.$routing->adultBasePrice.'<br>';
}
Getting single properties like the above is pretty straight forward, but for the information of the segments we would first need a nested foreach since we have multiple trips for each routing and then a second nested foreach since each trip has multiple segments
foreach($routings as $routing){ //$routing will hold the object value in each loop
echo 'Airline '.$routing->mainAirlineName.'<br>';
echo 'Adult Base Price '.$routing->adultBasePrice.'<br>';
foreach($routing->trips as $trip){
foreach($trip->segments as $index => $segment){
echo 'Segment '.$index.':<br>'
echo 'Depart From '.$segment->departureAirportCode.'<br>';
echo 'Departure Time '.$segment->departureTime.'<br>';
echo 'Duration '.$segment->duration.'<br>';
}
}
}
And that would be it. I hope my explanation was clear and you got the idea of how to traverse JSON objects
If you feel more comfortable working with an array than with an object to access your data [which might be where you're getting confused here] then you can use json_decode with an additional argument:
$data = json_decode($result, true);
This will leave you with an array ($data) containing all your flight information, you can then var_dump() it and see the hierarchy you're dealing with and loop through it.
I'm trying to pass 3 parameter to a script, where the 3rd parameter $_GET['value3'] is supposed to be an array
$_GET['value1']
$_GET['value2']
$_GET['value3'] //an array of items
I'm calling the script like this: (notice my syntax for value3, I'm not sure it's correct)
http://localhost/test.php?value1=test1&value2=test2&value3=[the, array, values]
I then use a foreach to hopefully loop through the third parameter value3 which is the array
//process the first input $_GET['value1']
//process the second input $_GET['value2']
//process the third input $_GET['value3'] which is the array
foreach($_GET['value3'] as $arrayitem){
echo $arrayitem;
}
but I get the error Invalid argument supplied for foreach()
I'm not sure if my methodology is correct. Can some clarify how you'd go about doing the sort of thing
There is no such thing as "passing an array as a URL parameter" (or a form value, for that matter, because this is the same thing). These are strings, and anything that happens to them beyond that is magic that has been built into your application server, and therefore it is non-portable.
PHP happens to support the &value3[]=the&value3[]=array&value3[]=values notation to automagically create $_GET['value3'] as an array for you, but this is special to PHP and does not necessarily work elsewhere.
You can also be straight-forward and go for a cleaner URL, like this: value3=the,array,values, and then use explode(',', $_GET['value3']) in your PHP script to create an array. Of course this implies that your separator char cannot be part of the value.
To unambiguously transport structured data over HTTP, use a format that has been made for the purpose (namely: JSON) and then use json_decode() on the PHP side.
try
http://localhost/test.php?value1=test1&value2=test2&value3[]=the&value3[]=array&value3[]=values
For arrays you need to pass the query parameters as
value3[]=abc&value3[]=pqr&value3[]=xyz
You can cast the name of the index in the string too
?value1[a]=test1a&value1[b]=test1b&value2[c][]=test3a&value2[c][]=test3b
would be
$_GET['value1']['a'] = test1a
$_GET['value1']['b'] = test1b
$_GET['value2']['c'] = array( 'test3a', 'test3b' );
http://php.net/manual/en/reserved.variables.get.php
Check out the above link..
You will see how the GET method is implemented.
What happens is that the URL is taken, it is delimited using '&' and then they are added as a key-value pair.
public function fixGet($args) {
if(count($_GET) > 0) {
if(!empty($args)) {
$lastkey = "";
$pairs = explode("&",$args);
foreach($pairs as $pair) {
if(strpos($pair,":") !== false) {
list($key,$value) = explode(":",$pair);
unset($_GET[$key]);
$lastkey = "&$key$value";
} elseif(strpos($pair,"=") === false)
unset($_GET[$pair]);
else {
list($key, $value) = explode("=",$pair);
$_GET[$key] = $value;
}
}
}
return "?".((count($_GET) > 0)?http_build_query($_GET).$lastkey:"");
}
Since, they are added as a key-value pair you can't pass array's in the GET method...
The following would also work:
http://localhost/test.php?value3[]=the&value3[]=array&value3[]=values
A more advanced approach would be to serialize the PHP array and print it in your link:
http://localhost/test.php?value3=a:3:{i:0;s:3:"the";i:1;s:5:"array";i:2;s:6:"values";}
would, essentially, also work.