I have an array..
$file=array(
'uid' => '52',
'guarantee_id' => '1116',
'file_id' => '8',
'file_category' => 'test',
'meta' =>'{"name":"IMAG0161.jpg","type":"image\/jpeg","tmp_name":"\/tmp\/phpzdiaXV","error":0,"size":1749244}',
'FileStorage' => array()
)
and I am trying to extract the name using
$fileName = $file['meta'['name'];
which gives me a Illegal string offset 'name' error.
The value of $file['meta'] is a string, not an array. That means your approach to access the value does not work.
It looks like that meta value string is a json encoded object. If so you can decode it and then access the property "name" of the resulting object.
Take a look at this example:
<?php
$file = [
'uid' => '52',
'guarantee_id' => '1116',
'file_id' => '8',
'file_category' => 'test',
'meta' =>'{"name":"IMAG0161.jpg","type":"image\/jpeg","tmp_name":"\/tmp\/phpzdiaXV","error":0,"size":1749244}',
'FileStorage' => []
];
$fileMeta = json_decode($file['meta']);
var_dump($fileMeta->name);
The output obviously is:
string(12) "IMAG0161.jpg"
In newer version of PHP you can simplify this: you do not have to store the decoded object in an explicit variable but can directly access the property:
json_decode($file['meta'])->name
The output of this obviously is the same as above.
This is happening because your meta is a json, so you should decode and then access whatever you need, not that I placed true as second parameter becuase i wanted to decode as an associative array instead of an object
$decoded = json_decode($file['meta'],true);
echo $decoded['name'];
//print IMAG0161.jpg
You can check a live demo here
But you can easily access as an obect
$decoded = json_decode($file['meta']);
echo $decoded->name;
//print IMAG0161.jpg
You can check a live demo here
<?php
$file=array(
'uid' => '52',
'guarantee_id' => '1116',
'file_id' => '8',
'file_category' => 'test',
'meta' =>'{"name":"IMAG0161.jpg","type":"image\/jpeg","tmp_name":"\/tmp\/phpzdiaXV","error":0,"size":1749244}',
'FileStorage' => array()
);
$meta=$file['meta'];
$json=json_decode($meta);
echo $json->name;
?>
Related
I am looking for a way to parse strings in an array to an array which has a similar pattern to how CakePHP handles POST data. Or even a function in CakePHP that would do it.
UPDATED:
Current array:
array(
'data[callers]' => (int) 4,
'data[status]' => 'Unknown',
'data[country_id][107]' => (int) 1,
'data[country_id][150]' => (int) 0
)
Desired result:
array(
'callers' => (int) 4,
'status' => 'Unknown',
'country_id' => array(
(int) 107 => (int) 1,
(int) 150 => (int) 0
)
)
The purpose is saving serialized form data which can later be passed to a PHP function without having to POST the data from the browser.
The data comes from a form which was serialized and saved in the database. CakePHP generates input names in the form with brackets like this: data[country_id][107] and inside the controller you can access it like this $this->request->data['country_id']['107']
But when I serialize the form with javascript and save the raw JSON string in the database I need a way to make it into an array like CakePHP does.
Firstly make sure your array is valid first like:
$data = array (
'callers' => 4,
'status' => 'Unknown',
'country_id' => array(
'107' => 0,
'150' => 0
)
);
JSON ENCODE
Now you can json encode it
$json = json_encode($data);
echo $json; // prints: {"callers":4,"status":"Unknown","country_id":{"107":0,"150":0}}
See ^ it is now a string.
http://php.net/manual/en/function.json-encode.php
JSON DECODE
Then when you need it as an array call json_decode()
json_decode($data, true);
Note the second parameter is setting return array to true else you will get an the json returned as an object.
http://php.net/manual/en/function.json-decode.php
I'm trying to test a Module and I need to recreate a json as follows:
$billing_info['billing']['source']->exp_year
I tried to recreate it as follows:
$arr = json_encode(['exp_month' => 07, 'funding' => 'credit', 'brand' => 'Visa', 'last4' => '4242']);
$billing_info = [ 'billing' => [ 'source' => $arr ] ];
But I'm not able to call dd($billing_info['billing']['source']->exp_year);
You have to decode your json string before you can access object variables again:
dd(json_decode($billing_info['billing']['source'])->exp_month);
If you really need to create an object as described, you can do the following:
$arr = json_encode(['exp_month' => 07, 'funding' => 'credit', 'brand' => 'Visa', 'last4' => '4242']);
$billing_info = [ 'billing' => [ 'source' => json_decode($arr) ] ];
And than you can call your
dd($billing_info['billing']['source']->exp_month);
method. In the example you described, there is no need to encode/decode to json anyway, but I assume you receive your json string from somewhere else.
json_encode creates a string, not an object, so you can't access properties of it. You have to call json_decode first:
dd(json_decode($billing_info['billing']['source'])->exp_year);
See also json_encode and json_decode docs.
You can also cast the array to object, like that:
$arr = (object) array('exp_month' => 07, 'funding' => 'credit', 'brand' => 'Visa', 'last4' => '4242');
You can then access its properties like that:
var_dump($arr->exp_month);
I have a problem with JSON data in PHP. I need to use data from this JSON in my SQL statement. When I'm trying to debug it with echo(var_dump, or print_r is not working too) command the output with is
{"records":"tekst","name":"[object Object]"}
This is a JSON structre:
{
records: 'tekst',
name: {
imie: 'imie1',
nazwisko: 'nazwisko1'
}
}
I'm trying to decode this by json_decode(), but I have an error
"Warning: json_decode() expects parameter 1 to be string, array
given".
Does anyone know what's wrong?
PHP manual about JSON and the format required: function.json-decode. basically, double quotes only and names must be quoted.
a demonstration of conversion using PHP.
So, you supply the json string that looks like, with the whitespace removed, like this:
{records:[{id:1,name:'n1'},{id:2,name:'n2'}]}
Which is an object containing an array with two entries that could be arrays or objects.
Except, it is not a valid JSON string as it contains single quotes. And PHP wants all the names in double quotes, as in "id":1.
So, possible PHP code to recreate that, assuming arrays as the inner entries is:
$json = new stdClass();
$records = array();
$entry = array('id' => 1, 'name' => 'n1');
$records[] = $entry;
$entry = array('id' => 2, 'name' => 'n2');
$records[] = $entry;
$json->records = $records;
$jsonEncoded = json_encode($json);
Which, when 'dump'ed looks like:
object(stdClass)[1]
public 'records' =>
array
0 =>
array
'id' => int 1
'name' => string 'n1' (length=2)
1 =>
array
'id' => int 2
'name' => string 'n2' (length=2)
Now, the string that structure produces is:
{"records":[{"id":1,"name":"n1"},{"id":2,"name":"n2"}]}
Which looks similar to yours but is not quite the same. Note the names in double quotes.
However, if your json string looked the same then PHP could decode it, as is shown below:
$jsonDecoded = json_decode($jsonEncoded);
var_dump($jsonDecoded, 'decoded');
Output: Note all objects...
object(stdClass)[2]
public 'records' =>
array
0 =>
object(stdClass)[3]
public 'id' => int 1
public 'name' => string 'n1' (length=2)
1 =>
object(stdClass)[4]
public 'id' => int 2
public 'name' => string 'n2' (length=2)
We may want arrays instead so use the true as the second parameter in the 'decode'
$jsonDecoded = json_decode($jsonEncoded, true);
var_dump($jsonDecoded, 'decoded with true switch');
Output: with arrays rather than objects.
array
'records' =>
array
0 =>
array
'id' => int 1
'name' => string 'n1' (length=2)
1 =>
array
'id' => int 2
'name' => string 'n2' (length=2)
string 'decoded with true switch' (length=24)
When trying to access an array inside an array, only NULL is output.
My Code:
$aStats = array();
$aStats['hd'] = array();
$aStats['hd'][] = array
(
'dev' => $device,
'total' => $total,
'used' => $used,
'free' => $free,
'used_perc' => $used_perc,
'mount' => $folder
);
echo $aStats['hd']['free'];
When using json_encode, the values are displayed correctly:
die( json_encode( $aStats ) );
Where is my mistake?
Replace these lines:
$aStats['hd'] = array();
$aStats['hd'][] = array
With this:
$aStats['hd'] = array
You appear to be accessing your array ($aStats['hd']['free'];) as if the value of hd is an associated array, but using [] creates a new integer index in the array, and stores the value in that index. Joe Walker's answer shows what happens instead, that you have an associative array pointing to an indexed array pointing to another associative array, rather than the associative to associative array you suggest you're trying to use in your echo statement.
This is a practical tip that will let you find out where is the issue easly, all you need to do is:
var_dump($aStats);
This will output:
array (size=1)
'hd' =>
array (size=1)
0 =>
array (size=6)
'dev' => string 'SomeDevice' (length=10)
'total' => string '10000' (length=5)
'used' => boolean true
'free' => boolean false
'used_perc' => string 'none' (length=4)
'mount' => string '/some/directory/here/' (length=21)
Now you know you can access this element using
$aStats['hd'][0]['free'];
This will return null in your question because your variables are not yet initialized, but I guess you do have them initialized in your code, hope this helps.
Sometime back I was getting alot of data via some API and I saved it into a flat file doing a simple var_dump or print_r. Now I am looking to process the data and each line looks like:
" 'middle_initial' => '', 'sid' => '1419843', 'fixed' => 'Y',
'cart_weight' => '0', 'key' => 'ABCD', 'state' => 'XX', 'last_name'
=> 'MNOP', 'email' => 'abc#example.com', 'city' => 'London',
'street_address' => 'Sample', 'first_name' => 'Sparsh',"
Now I need to get this data back into an array format. Is there a way I can do that?
What about first exploding the string with the explode() function, using ', ' as a separator :
$str = "'middle_initial' => '', 'sid' => '1419843', 'fixed' => 'Y', 'cart_weight' => '0', 'key' => 'ABCD', 'state' => 'XX', 'last_name' => 'MNOP', 'email' => 'abc#example.com', 'city' => 'London', 'street_address' => 'Sample', 'first_name' => 'Sparsh',";
$items = explode(', ', $str);
var_dump($items);
Which would get you an array looking like this :
array
0 => string ''middle_initial' => ''' (length=22)
1 => string ''sid' => '1419843'' (length=18)
2 => string ''fixed' => 'Y'' (length=14)
3 => string ''cart_weight' => '0'' (length=20)
...
And, then, iterate over that list, matching for each item each side of the =>, and using the first side of => as the key of your resulting data, and the second as the value :
$result = array();
foreach ($items as $item) {
if (preg_match("/'(.*?)' => '(.*?)'/", $item, $matches)) {
$result[ $matches[1] ] = $matches[2];
}
}
var_dump($result);
Which would get you :
array
'middle_initial' => string '' (length=0)
'sid' => string '1419843' (length=7)
'fixed' => string 'Y' (length=1)
'cart_weight' => string '0' (length=1)
...
But, seriously, you should not store data in such an awful format : print_r() is made to display data, for debugging purposes -- not to store it an re-load it later !
If you want to store data to a text file, use serialize() or json_encode(), which can both be restored using unserialize() or json_decode(), respectively.
Although I wholeheartedly agree with Pascal Martin, if you have this kind of data to deal with, the following (as Pascal's first suggestion mentions) could work depending on your actual content. However, do yourself a favor and store your data in a format that can be reliably put back into a PHP array (serialize, JSON, CSV, etc...).
<pre>
<?php
$str = "\" 'middle_initial' => '', 'sid' => '1419843', 'fixed' => 'Y', 'cart_weight' => '0', 'key' => 'ABCD', 'state' => 'XX', 'last_name' => 'MNOP', 'email' => 'abc#example.com', 'city' => 'London', 'street_address' => 'Sample', 'first_name' => 'Sparsh',\"";
function myStringToArray($str) {
$str = substr($str, 1, strlen(substr($str, 0, strlen($str)-2)));
$str = str_replace("'",'',$str);
$strs = explode(',', $str);
$arr = array();
$c_strs = count($strs);
for ($i = 0; $i < $c_strs; $i++) {
if (strpos($strs[$i],'=>') !== false) {
$_arr = explode('=>',$strs[$i]);
$arr[trim($_arr[0])] = trim($_arr[1]);
}
}
return $arr;
}
print_r(myStringToArray($str));
?>
</pre>
http://jfcoder.com/test/substr.php
Note, you would need to adjust the function if you have comma's within your array member's content (for instance, using Pascal's suggestion about the ', ' token).
It would be better and much easier to work with Serialize and Unserialize instead of var_dump.
in that form, maybe you could try a
explode(' => ', $string)
and then go through the array and put the pairs together in a new array.
As long as it's the output of print_r and an array, you can use my little print_r converter, PHP source code is available with the link.
The tokenizer is based on regular expressions so you can adopt it to your needs. The parser deals with forming the PHP array value.
You will find the latest version linked on my profile page.