I'm creating a JSON feed with PHP using echo json_encode($my_array).
The resulting string passed to the browser should be as shown below:
[{"ACC_NUM":"147545","BOOK_DATE":"2011-10-22"},{"ACC_NUM":"147546","BOOK_DATE":"2011-10-22"}]
In Firefox, the json string is received as shown. However, in webkit browsers (Safari, Chrome), the last character of the string gets cut off. This results in a parse error.
I've even tried serving the feed as application/json and text/html to no avail.
Does anyone know what's going on? Am I doing something wrong here? Thanks in advance.
BACKEND CODE:
// $result contains rows from a mysql query
if($result) {
$arr = array();
foreach($result as $key => $val) {
$arr[$key] = $val;
}
echo json_encode($arr);
}
this is saved in index.php which I can view in the browser and shows the resulting json feed.
For those who encounter this problem with Slimframework.
After echoing the json string, just add an exit command.
if($result) {
$arr = array();
foreach($result as $key => $val) {
$arr[$key] = $val;
}
echo json_encode($arr);
exit; // <------------------- Hallelujah!!!
}
Related
I have the following code:
<?php
$json = file_get_contents("https://api.nanopool.org/v1/eth/payments/0x218494b2284a5f165ff30d097d3d7a542ff0023B");
$decode = json_decode($json,true);
foreach($decode['data'] as $val){
echo date('Y-m-d',$val['date']).' -- '.$val['amount'].' -- '.$val['txHash'].' -- '.$val['confirmed'];
echo "<br/>";
}
The API used (nanopool) being extremely unreliable, I get a non empty json (success) every 2 to 10 calls.
I tried to loop the file_get_contents (do... while) until getting a non empty json without success. What can you recommend to loop until I get an answer?
Maybe you can try something like this, still I don't recommend using this within a synchronous script (eg a web page) because you can't control the time needed to get a successfull answer.
<?php
function getFileFTW($url)
{
$fuse = 10;//maximum attempts
$pause = 1;//time between 2 attempts
do {
if($fuse < 10)
sleep($pause);
$s = #file_get_contents($url);
}
while($s===false && $fuse--);
return $s;
}
$json = getFileFTW("https://api.nanopool.org/v1/eth/payments/0x218494b2284a5f165ff30d097d3d7a542ff0023B");
if($json) {
$decode = json_decode($json,true);
//...
}
else {
//json not loaded : handle error
}
I am trying to modify data in a json file with php. The code I am using is below. It is able to successfully ready the file contents and in the foreach loop it will echo out in the if statement.
This is great, the if statement is hardcoded for now to test. What I want to do is modify various properties and write it back to the file. This does not seem to be working. When I load the page, then refresh to see if the new value was set it just keeps echoing the same values. I download the .json locally and nothing has changed.
Any thoughts on what I am doing wrong?
//Get file, decode
$filename = '../json/hartford.json';
$jsonString = file_get_contents($filename);
$data = json_decode($jsonString, true);
foreach ($data['features'] as $key => $segment) {
if ($segment['properties']['UID'] == '25301') {
//echo out properties for testing
echo("KEY: ".$key."<br/>");
echo("UID: ".$segment['properties']['UID']."<br/>");
echo("Full Name: ".$segment['properties']['FULLNAME']."<br/>");
echo("FCC: ".$segment['properties']['FCC']."<br/>");
echo("Render CL: ".$segment['properties']['RENDER_CL']."<br/>");
echo("<hr/>");
//set property to new value.... NOT WORKING?
$segment['properties']['RENDER_CL'] = 111;
}
}
//Test if file is writable to be sure
$writable = ( is_writable($filename) ) ? TRUE : chmod($filename, 0755);
if ( $writable ) {
$newJsonString = json_encode($data);
if (file_put_contents($filename, $newJsonString)) {
echo('Put File Content success');
} else {
echo('NOT put');
}
} else {
echo 'not writeable';
}
In the end it will echo out 'Put File Content success' which seems to indicate it was successful but it isn't... Thanks for any advice.
You need to understand how foreach cycle works. The thing is, that the value you're getting ($segment) is a copy of the real value in the source array. So when you assign to it ($segment['properties']['RENDER_CL'] = 111;), you don't really change the source array. You only change some local variable that goes out of scope when the cycel-loop ends.
There are several ways how to solve this issue. One of them is to add & before the value-variable:
foreach ($data['features'] as $key => &$segment)
This tells it to use the reference of the array-item, not to copy its value.
You should use $segment variable in foreach as a reference:
foreach ($data['features'] as $key => &$segment) {
...
$segment['properties']['RENDER_CL'] = 111;
}
I'm wondering if anyone could help me out in trying to use a feature of my form plugin (FormCraft for Wordpress) that allows the form data to be sent to a URL. There's no documentation on this feature and I can't figure it out. Here's a screenshot of the options:
I've created an empty form_data.php file and uploaded it to my site, then put that URL in the field seen in the screenshot. Nothing happens in the php file when I submit a form. The support team for the plugin hasn't been very helpful, they just said, "You need to make sure the script on that URL will catch and parse the data." Is there anything that I would need to add to the php file to get this to work?
Send the data to this file below.
http://localhost/bellow_file.php
<?php
$json = json_encode($_REQUEST, JSON_UNESCAPED_UNICODE);
$json = json_decode($json,true);
$data = "";
foreach ($json as $key => $val) {
if(is_array($val)) {
$data .= "$key:\n";
} else {
$data .= "$key => $val\n";
}
}
file_put_contents('test.txt', $data);
?>
I have a JSON file that looks a little like this:
[
{
"uniqid":"sd54sd54f",
"Make":"Toyota",
"Start Prod":258147369,
"End Prod":369147258
},
{
"uniqid":"6sdf46sd",
"Make":"BMW",
"Start Prod":789456123,
"End Prod":159487263
},
]
What I need to do is remove an entire entry (uniqid, make, start prod and end prod) based on a uniqid that will be passed in through an HTTP POST request. So far all I have is:
$var1 = $_GET['uniqid'];
$file = 'cars.json';
$json = json_decode(file_get_contents($file), true); //im not sure if file_get_contnets is necessary...
$unset_queue = array();
foreach ( $json as $i => $item )
{
if ($item->uniquid == $var1)
{
$unset_queue[] = $i;
}
}
foreach ( $unset_queue as $index )
{
unset($json->json[$index]);
}
$json = array_values($json);
$new_json_string = json_encode($json);
When I run the code, I get no errors but the item is not removed...
EDIT: Here is the output issue at this point. Note the numbering of each car:
{"1":
{
"uniqid":"sd54sd54f",
"make":"Toyota",
"start prod":"258147369",
"end prod":"369147258"
},
"2":
{
"uniqid":"5372ab2109b05",
"make":"6sdf46sd",
"start prod":"789456123",
"end prod":"159487263"},
}
}
You have mentioned that you will be passing your request through HTTP POST. In that case , in order to make your code to work, you should change $var1 = $_GET['uniqid']; to $var1 = $_POST['uniqid'];
You can use a simple function with the JSON variable passed by reference:
function removeNode($uniqid, &$json) {
$json = json_decode($json, true); // get associative array from json
foreach($json as $key => $each) { // loop through
if($each['uniqid'] == $uniqid) // find matching unique
unset($json[$key]); // remove node from array
}
$json = json_encode($json); // re-encode array as json
}
And use like this:
removeNode('6sdf46sd', $json);
Example: https://eval.in/150341
Specific use case for you:
$var1 = $_POST['uniqid']; // you're posting the data right?
$file = 'cars.json';
$json = file_get_contents($file);
removeNode($var1, $json);
echo $json; // updated JSON
// or if you want to update the file:
// file_put_contents($file, $json);
Well, there are a couple of things wrong:
You are not checking that your code does what you think it does. It is important to check for errors.
You can unset the item inside the first loop. The second loop is not necessary.
Inside the second loop you are accessing an object and property that does not exist. When you decoded the JSON you specifically told it to return arrays.
First of all you should put this at the top of your script:
error_reporting(-1);
ini_set('display_errors', 'On');
That will show you every single error that occurs.
Second, you should fix your code. I just rewrote and commented your code. It is easier to show you than explain.
// Make sure that you are notified of all errors
error_reporting(-1);
ini_set('display_errors', 'On');
// Get 'uniqid' from POST/GET array; show error if
// it is not set
$var1 = filter_input(INPUT_POST, 'uniqid', FILTER_UNSAFE_RAW);
if ($var1 === null) {
die('The "uniqid" parameter is not set');
}
// Read data from file; show error if it does not work
$data = file_get_contents('cars.json');
if ($data === false) {
die('An error occurred when opening "cars.json"');
}
// Decode JSON; show error if invalid JSON
$json = json_decode($data, true);
if ( ! isset($json[0]['uniqid'])) {
die("The JSON was not decoded correctly");
}
// Go over each item in the array
foreach ($json as $key => $value) {
// If the 'uniqid' equals GET parameter
if ($value['uniqid'] == $var1) {
// Then unset it using the item's $key position
unset($json[$key]);
}
}
// Encode it again
$new_json_string = json_encode($json);
If it is a GET request then you can use this instead:
// ...
$var1 = filter_input(INPUT_GET, 'uniqid', FILTER_UNSAFE_RAW);
// ...
When you are done with the code, and you make it live, you should disable errors:
ini_set('display_errors', 'Off');
That makes sure that people cannot see the errors. Error messages often include file names and such, which is not something people should see.
$inputDatabase = array_values(json);
I'm using the Class "mysql2json" to make my Json.
<?php
class mysql2json{
static public function getJSON($resultSet,$affectedRecords){
mb_internal_encoding("UTF-8");
$numberRows=0;
$arrfieldName=array();
$i=0;
$json="";
//print("Test");
while ($i < mysql_num_fields($resultSet)) {
$meta = mysql_fetch_field($resultSet, $i);
if (!$meta) {
}else{
$arrfieldName[$i]=$meta->name;
}
$i++;
}
$i=0;
$json="{\n\"data\": [\n";
while($row=mysql_fetch_array($resultSet, MYSQL_NUM)) {
$i++;
//print("Ind ".$i."-$affectedRecords<br>");
$json.="{\n";
for($r=0;$r < count($arrfieldName);$r++) {
$json.="\"$arrfieldName[$r]\" : \"$row[$r]\"";
if($r < count($arrfieldName)-1){
$json.=",\n";
}else{
$json.="\n";
}
}
if($i!=$affectedRecords){
$json.="\n},\n";
}else{
$json.="\n}\n";
}
}
$json.="]\n};";
return $json;
}
}
?>
The problem is I'm getting a not valid JSON error in Xcode (iPhone App) and the JSON validator is saying there is an error on line 11 of the results even though line 11 is blank.
Validator: http://jsonlint.com/
Here is a sample URL.
http://leafseed.com/webservice.php?upc=1116102338
Xcode Error:
2012-01-11 08:55:46.137 GroceryVine[6476:bf03] -JSONValue failed. Error trace is: (
"Error Domain=org.brautaset.JSON.ErrorDomain Code=10 \"Garbage after JSON\" UserInfo=0x9bbabc0 {NSLocalizedDescription=Garbage after JSON}
Validator Error
Parse error on line 11:
...." } ]};
--------------------^
Expecting 'EOF', '}', ',', ']'
Any Ideas?
Best Solution
I wouldn't bother with this class. Just use the native json_encode() DOCs PHP function as it will give you correctly formatted JSON very easily every time.
For example:
$json_arr = array();
while($row = mysql_fetch_array($resultSet, MYSQL_NUM)) {
$json_arr[] = $row;
}
echo json_encode($json_arr);
A list of other PHP JSON implementations can be found on the json.org website (hint: scroll down).
Direct answer
Looking at your updated question with debug output. Looks like there is an errant semi-colon (;) in your output.
Change your last append from
$json.="]\n};";
to
$json.="]\n}";
And I think that will fix your issue.
what about json_encode function and fetch data separately ?
http://php.net/manual/en/function.json-encode.php
The ; after the last curly brace is wrong
Replacing:
}
$json.="]\n};";
return $json;
}
With
}
$json.="]\n}";
return $json;
}
should solve your problem.