I have a json file which is read by php and i want to change one object of the json file using php now my code looks like this but it doesn't work so how should I do? (the obj_name in the son object should be modified to $name)
<?php
$json = $_POST['myobj'];
$data = json_decode($json,true);
$name = xxxxxxxxx;
$data['obj_name'] = "$name";
#json = json_encode($data);
$filename = xxxxxxxxxxxxx
$file = fopen($filename,'w+');
fwrite($file, $json);
fclose($file);
?>
The # is commenting out your code and it should be a $ to make it a variable.
So, change this:
#json = json_encode($data);
to this:
$json = json_encode($data);
Related
Can anyone please shows me how to get the input of PHP to JSON file (.json) and read data from JSON file and display in PHP (Echo).
for example:
$myObj->name = "John";
$myObj->age= 20;
to result.json
{"name":"John","Age":20}
and retrieve from result.json and display data in PHP as
name=John
Age=20
To convert the object to json use this:
$json = json_encode($myObj);
See the json_encode docs.
To return it back to the format you want try this...
$obj = json_decode($json);
$name = $obj->name; // John
$age = $obj->age; // 20
See the json_decode docs.
To iterate over keys and values do something like this:
foreach($obj as $key=>$value)
{
echo $key . " = " . $value . "\n";
}
json_encode() is used for encoding PHP data into a JSON format and json_decode() is used to decode JSON into a PHP data
json_encode documentation:
http://php.net/manual/en/function.json-encode.php
json_decode documentation
http://php.net/manual/en/function.json-decode.php
if you are having an php array you can convert it into json.
$json_string = json_encode($array);
and write this into a json file.
$fp = fopen('results.json', 'w');
fwrite($fp, json_string);
fclose($fp);
now convert your json string which is in results.json to array.
$str = file_get_contents('./results.json');
$array = json_decode($str, true); // decode the JSON into an associative array
I have a .txt file called 'test.txt' that is a JSON array like this:
[{"email":"chrono#gmail.com","createdate":"2016-03-23","source":"email"}]
I'm trying to use PHP to decode this JSON array so I can send my information over to my e-mail database for capture. I've created a PHP file with this code:
<?php
$url = 'http://www.test.com/sweeps/test.txt';
$content = file_get_contents($url);
$json = json_decode($content,true);
echo $json;
?>
For some reason, it's not echoing the decoded JSON when I visit my php page. Is there a reason for this and can anyone shed some light? Thanks!
You use echo to print scalar variables like
$x = 'Fred';
echo $x;
To print an array or object you use print_r() or var_dump()
$array = [1,2,3,4];
print_r($array);
As json_decode() takes a JSON string and converts it to a PHP array or object use print_r() for example.
Also if the json_decode() fails for any reason there is a function provided to print the error message.
<?php
$url = 'http://www.test.com/sweeps/test.txt';
$content = file_get_contents($url);
$json = json_decode($content,true);
if ( json_last_error() !== JSON_ERROR_NONE ) {
echo json_last_error_msg();
exit;
}
You'll need to split that json string into two separate json strings (judging by the pastebin you've provided). Look for "][", break there, and try with any of the parts you end up with:
$tmp = explode('][', $json_string);
if (!count($tmp)) {
$json = json_decode($json_string);
var_dump($json);
} else {
foreach ($tmp as $json_part) {
$json = json_decode('['.rtrim(ltrim($json_string, '['), ']').']');
var_dump($json);
}
}
I have a JSON file badly formatted (doc1.json):
{"text":"xxx","user":{"id":96525997,"name":"ss"},"id":29005752194568192}
{"text":"yyy","user":{"id":32544632,"name":"cc"},"id":29005753951977472}
{...}{...}
And I have to change it in this:
{"u":[
{"text":"xxx","user":{"id":96525997,"name":"ss"},"id":29005752194568192},
{"text":"yyy","user":{"id":32544632,"name":"cc"},"id":29005753951977472},
{...},{...}
]}
Can I do this in a PHP file?
//Get the contents of file
$fileStr = file_get_contents(filelocation);
//Make proper json
$fileStr = str_replace('}{', '},{', $fileStr);
//Create new json
$fileStr = '{"u":[' . $fileStr . ']}';
//Insert the new string into the file
file_put_contents(filelocation, $fileStr);
I would build the data structure you want from the file:
$file_path = '/path/to/file';
$array_from_file = file($file_path);
// set up object container
$obj = new StdClass;
$obj->u = array();
// iterate through lines from file
// load data into object container
foreach($array_from_file as $json) {
$line_obj = json_decode($json);
if(is_null($line_obj)) {
throw new Exception('We have some bad JSON here.');
} else {
$obj->u[] = $line_obj;
}
}
// encode to JSON
$json = json_encode($obj);
// overwrite existing file
// use 'w' mode to truncate file and open for writing
$fh = fopen($file_path, 'w');
// write JSON to file
$bytes_written = fwrite($fh, $json);
fclose($fh);
This assumes each of the JSON object repsentations in your original file are on a separate line.
I prefer this approach over string manipulation, as you can then have built in checks where you are decoding JSON to see if the input is valid JSON format that can be de-serialized. If the script operates successfully, this guarantees that your output will be able to be de-serialized by the caller to the script.
I need to decode this json value using PHP. I need the value 'url'.
Here is what I have but does not work.
$json = file_get_contents('http://graph.facebook.com/{fb-ID}/picture?type=large&redirect=false');
$decoded = json_decode($json,true);
$url = $decoded[???]; // NEED THIS VAR.
Since $decoded is a PHP array you can access it like any other array:
$url = $decoded['data']['url'];
$decoded=(object)json_decode( $json['data'], true );
echo $decoded->url
This worked:
$json = file_get_contents('http://graph.facebook.com/{fb-ID}/picture?type=large&redirect=false');
$decoded = json_decode($json,true);
$url = $decoded['data']['url'];
I want to retrieve array value.
This is my array value:
overlay.txt:
{"title":"sss","description":"sss","code":"sss"}
{"title":"trtr","description":"trtr","code":"tyrytr"}
{"title":"ret54","description":"56tr","code":"ty76"}
{"title":"rgfdg","description":"dfgdfg","code":"dfgdfg"}
{"title":"asfafdsf","description":"sdfsdf","code":"sdfsdfsdf"}
This is my code: but this is not working.why?
How to retrieve value from overlay.txt file.
I did not get all title value.
I do not known how to get title value from overlay.txt
The $title is showing empty.
Where I want to change in my code to get $title value.
$info = array();
$folder_name = $this->input->post('folder_name');
$info['title'] = $this->input->post('title');
$info['description'] = $this->input->post('description');
$info['code'] = $this->input->post('code');
$json = json_encode($info);
$file = "./videos/overlay.txt";
$fd = fopen($file, "a"); // a for append, append text to file
fwrite($fd, $json);
fclose($fd);
$filecon = file_get_contents('./videos/overlay.txt', true);
$this->load->view('includes/overlays',$filecon);
//overlays page;
foreach($filecon as $files)
{
$title=$files['title'];
echo $title;
}
You're encoding your array to JSON, so at some point you need to decode it again into a PHP array. Since you actually have several JSON objects in the file, you need to decode each one individually. Assuming it's always one JSON object per line, this'll do:
$jsonObjects = file('overlay.txt', FILE_IGNORE_NEW_LINES);
foreach ($jsonObjects as $json) {
$array = json_decode($json, true);
echo $array['title'];
...
}
This will very quickly break if there are line breaks within the serialized JSON, e.g.:
{"title":"ret54","description":"foo
bar","code":"ty76"}
That way of storing the data is not very reliable.
make overlay.txt fully json format:
[
{"title":"sss","description":"sss","code":"sss"},
{"title":"trtr","description":"trtr","code":"tyrytr"},
...
]
and try this:
$raw = file_get_contents('./videos/overlay.txt', true);
$this->load->view('includes/overlays', array("filecon" => json_decode($raw)));
overlay page:
<?php
foreach($filecon as $files) {
echo $files['title'];
}
?>
If you want to use $filecon in view file,
set an array which has the key "filecon" in $this->load->view()'s second argument.
http://codeigniter.com/user_guide/general/views.html