This question already has an answer here:
How to extract and access data from JSON with PHP?
(1 answer)
Closed 1 year ago.
Here's the json
{"msg":"OK","server_time":"2021-11-19 16:41:22","status":200,"result":{"total_pages":1,"files":[{"download_url":"DOWNLOADLINKHERE1","single_img":"IMAGEURLHERE1","file_code":"CODEHERE1","title":"TITLEHERE1"},{"download_url":"DOWNLOADLINKHERE2","single_img":"IMAGEURLHERE2","file_code":"CODEHERE2","title":"TITLEHERE2"}],"results_total":"2","results":2}}
Here's my code
$json = json_decode($data);
foreach($json["result"] as $result){
foreach($result["files"] as $file){
echo $file["file_code"];
}
}
I want to extract all values from the "file_code". I got an error
Warning: Invalid argument supplied for foreach()
I was able get the VALUE of the first one using
echo $json->result->files[0]->file_code;
Is it possible to use a LOOP for the files[0]?
This line:
foreach($json["result"] as $result){
sees $json['result'] as an object, and so the next line tests for total_pages["files"], which doesn't exist.
Putting both foreach's together solves the problem:
$data='{"msg":"OK","server_time":"2021-11-19 16:41:22","status":200,"result":{"total_pages":1,"files":[{"download_url":"DOWNLOADLINKHERE1","single_img":"IMAGEURLHERE1","file_code":"CODEHERE1","title":"TITLEHERE1"},{"download_url":"DOWNLOADLINKHERE2","single_img":"IMAGEURLHERE2","file_code":"CODEHERE2","title":"TITLEHERE2"}],"results_total":"2","results":2}}';
$json = json_decode($data, true);
foreach($json["result"]["files"] as $file)
print $file["file_code"];
Teh playground
Alternatively, make the JSON result into an array, and use object property accessors instead of associative array bindings.
$data='{"msg":"OK","server_time":"2021-11-19 16:41:22","status":200,"result":[{"total_pages":1,"files":[{"download_url":"DOWNLOADLINKHERE1","single_img":"IMAGEURLHERE1","file_code":"CODEHERE1","title":"TITLEHERE1"},{"download_url":"DOWNLOADLINKHERE2","single_img":"IMAGEURLHERE2","file_code":"CODEHERE2","title":"TITLEHERE2"}],"results_total":"2","results":2}]}';
$json = json_decode($data);
foreach($json->result as $result){
foreach($result->files as $file){
echo $file->file_code;
}
}
Teh playground
I replicated your situation and it turns out that your JSON is invalid. You're missing a } at the end.
The reason for not getting an exception is because json_decode does not throw an error by default. You can make it do so by adding the JSON_THROW_ON_ERROR flag,
read the docs for more info.
This works perfect for me. If you have any thoughts please feel free to correct me.
$num = count($json->result->files);
echo $num;
for($i=0;$i<$num;$i++)
{
echo $json->result->files[$i]->file_code;
}
Related
This question already has an answer here:
How to extract and access data from JSON with PHP?
(1 answer)
Closed 1 year ago.
I unfortunately got some problems getting the exact information I want out of this json file.
Thats a part of the json file:
{
"weather":[
{
"id":600,
"main":"Snow",
"description":"light snow",
"icon":"13n"
}
],
"base":"stations",
"main":{
"temp":271.15,
"feels_like":266.48,
"temp_min":271.15,
"temp_max":271.15,
"pressure":1020,
"humidity":86
}
}
Thats my code to read the informations:
$weather = file_get_contents("weather.json");
$weather = json_decode($weather);
foreach($weather->main as $main) { //<-- This dosen't works
echo $main->temp;
}
foreach($weather->weather as $w) { //<-- This works
echo $w->description;
}
I see that there is a different between the weather- and the main-part with the "[...]" but I don't know how to handle that. Thank you for everyone who helps! :)
foreach($weather->weather as $w) {
echo $w->description;
}
As per Json weather works because it has array of objects so by looping it by foreach you get an object and can access properties there
foreach($weather->main as $main) {
echo $main->temp;
}
Where main is object not array of object so while looping it not showing desired results
Though you can access its value as
$weather->main->temp
Please look to the main and make it like
$array[‘weather’][‘main’][]= main object here
That should work
This question already has an answer here:
How to extract and access data from JSON with PHP?
(1 answer)
Closed 4 years ago.
i have the following Json sent via ajax to test.php:
[{},{"product[]":"john","qty[]":"12","price[]":"100","total[]":"1200"},{"product[]":"juan","qty[]":"22","price[]":"3.5","total[]":"77"},{"product[]":"louis","qty[]":"99","price[]":"1.22","total[]":"120.78"},{"product[]":"paul","qty[]":"5","price[]":"2.1","total[]":"10.5"},{"product[]":"carl","qty[]":"9","price[]":"14","total[]":"126"},{"total_amount":"1533.00"}]
In my php file I am trying to loop through each individual product[], qty[], price[] and list values:
<?php
$obj = json_decode($_POST["mydata"]);
header('Content-Type: application/json');
// echo json_encode($obj[1]->{'product[]'}); //(works)
foreach($obj as $item) {
echo $item['product[]'].'<br>';
echo $item['price[]'].'<br>';
echo $item['qty[]'].'<br>';
echo $item['total[]'].'<br>';
}
?>
but this throws an error.
What is wrong in my loop?
There are a couple of things wrong with the code, the first is that you decode as objects and try and use this as an array. You need to pass true as the second parameter to json_decode() to make it an associative array.
The second is that your array contains elements which don't have all of the details. The last element only has "total_amount", so none of the other fields exist. This is why I use
if ( isset($item['product[]'])){
to check the object before outputting the data...
$obj = json_decode($_POST["mydata"], true);
header('Content-Type: application/json');
foreach($obj as $item) {
if ( isset($item['product[]'])){
echo $item['product[]'].'<br>';
echo $item['price[]'].'<br>';
echo $item['qty[]'].'<br>';
echo $item['total[]'].'<br>';
}
}
Pass true as second argument to json_decode.
Per the documentation:
assoc
When TRUE, returned objects will be converted into associative arrays.
So your code becomes:
$obj = json_decode($_POST["mydata"], true);
Also note that the first entry in your array is empty, so you're gonna have to check for that.
This question already has answers here:
Get value from JSON array in PHP
(4 answers)
Closed 6 years ago.
I have a json data from API and i want to insert them to my database table. I have extract $data using json_encode function, but when i tried to access data inside $myJson with some of this code, it gives me an error result.
$data = '{"posts":[{"post":{"math_score":"85","history_score":"70"}}]}';
$myJson = json_decode($data);
foreach ($myJson as $mj){
echo $mj['math_score'];
// echo $mj->math_score; <= error
// echo $mj[0]->post->math_score; <= error
// echo $mj->post->math_score; <= error
}
The error : Invalid argument supplied for foreach().
sorry for my bad grammar, any answer will be greatly appreciated. Thanks
There is built in php function json_decode()
Try
$json = '{"posts":[{"post":{"math_score":"85","history_score":"70"}}]}';
$json = json_decode($json);
echo $json->posts{0}->post->math_score;
By default json_decode return object. If you want an array then you need to pass second argument true to json_decode.
Try it with Array
$json = '{"posts":[{"post":{"math_score":"85","history_score":"70"}}]}';
$json = json_decode($json, true);
foreach ($json['posts'] as $mj)
{
echo $mj['post']['math_score'];
}
This question already has an answer here:
How to extract and access data from JSON with PHP?
(1 answer)
Closed 6 years ago.
So I've been stumped and I'm not sure how I would continue this
as an example let's just use books.com as the URL and let's say the JSON response from the URL is
[{"title":"first_title","description":"second_title"},
{"title":"second_title","description":"second_description"}]
How would I print all of the titles (just the titles) without knowing exactly how many there are.
I know that I would need to loop through the JSON but I'm unsure how, if I could have any guidance that would be fantastic.
You should get more familiar with json_decode() and foreach().
First you need to decode json (into array in this example) and then iterate through all elements.
Example of working code:
<?php
$json = '[{"title":"first_title","description":"second_title"},
{"title":"second_title","description":"second_description"}]';
$jsonArray = json_decode($json,true);
foreach($jsonArray as $entry) {
echo $entry['title'].'<br>';
}
Output:
first_title
second_title
This key is to actually convert the JSON response into a PHP associative array by using json_decode and then loop through it.
// Convert the JSON into a PHP associative Array
$response = json_decode($curlResponse,true);
// Loop through the array
foreach ($response as $value) {
echo $value['title'];
echo '<br/>';
}
I know others have already asked about this, but I don't find a solution for my problem. In my PHP page I call an external service and I can't modify the response obtained.
I'm moving my first steps both with JSON and PHP.
The response is a JSON like this, I print this using the var_dump method:
object(stdClass)#1 (3)
{
["search_string"]=>string(15) "ABCDEFG HI LMNO"
["resut"]=>string(5) "apixi"
["0"]=>array(1){
[0]=>object(stdClass)#2(2){
["resp_code"]=>string(7) "12.34.0"
["resp_description"]=>string(15) "ABCDEFG HI LMNO"
}
}
}
In my PHP page I can read the value ”ABCDEFG HI LMNO” for the key "search_string" with this code, in the $output variable I store the result of the cUrl call
.......
$output = curl_exec($ch);
$jsonDecode =json_decode(str_replace('""','"',$output));
var_dump($jsonDecode);
echo $jsonDecode -> search_string;
I need the str_replace method because the JSON is dirty but not always, how can I access at the fields "resp_code" and "resp_description" and then store them in a variable? I tried many solutions but none works for me.
Instead of converting JSON array to stdClass object you can also convert it to regular PHP array by adding second parameter to the json_decode function:
$jsonDecode =json_decode(str_replace('""','"',$output), true);
In your case in the output, you'll get a multidimensional array.
Then, to access resp_code and resp_description, you can do something like this:
$respCode = $jsonDecode[0]["resp_code"];
$respDescription = $jsonDecode[0]["resp_description"];
In the decoded JSON you have, the resp_code and resp_description keys are difficult to get to, because the top-level object has a numerical ("0") attribute. Trying to reach that attribute like this:
$jsonDecode -> 0
will give this parsing error:
syntax error, unexpected '0' (T_LNUMBER), expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$'
Trying the same with a string notation (-> "0") also fails.
However, the suggestion in the error message is useful: encapsulate the zero with braces. Then you can proceed easily by adding the array index selector ([0]) to get to the object and keys of your interest, like this:
echo $jsonDecode->{0}[0]->resp_code;
echo $jsonDecode->{0}[0]->resp_description;
If you expect more elements in that array $jsonDecode->{0}, then loop over them like this:
foreach ($jsonDecode->{0} as $element) {
echo $element->resp_code;
echo $element->resp_description;
}
Alternative
If, however, you prefer to work with associative arrays instead of objects, you can use the second argument of json_encode as stated in the docs:
assoc
When TRUE, returned objects will be converted into associative arrays.
So then you would pass true as second argument:
$jsonDecode = json_decode(str_replace('""', '"', $output), true);
The above code would then be rewritten like this to access the variable as an associative array:
foreach ($jsonDecode[0] as $element) {
echo $element["resp_code"];
echo $element["resp_description"];
}