Convert array to json php

Everyday use of JSON is to read data from a web server and display the data on a web page. When exchanging data between the browser and a server, data can only be in the form of text.

JSON is a text format, and we can convert any JavaScript object into a JSON format and send that JSON to a server.

PHP has some built-in functions to handle JSON.

To convert PHP array to JSON, use the json_encode() function. The json_encode() is a built-in PHP function that converts an array to json. The json_encode() function returns the string containing a JSON equivalent of the value passed to it, as demonstrated by the numerically indexed array. We can also convert any JSON received from a server into JavaScript objects.

Objects and arrays can be converted into JSON using the json_encode() method.

Let’s see the following example.

Output
A
numerically indexed PHP array is translated to the array literal in a JSON string. JSON_FORCE_OBJECT option can be used if you want that array to be output as the object instead.
See the following code.
See the output.



Convert Associative Array to JSON
Let’s take the example of converting a key-value pair array
to json.
 'Krunal', 'blog' => 'AppDividend', 'education' => 'BE'];
$jsonData = json_encode($data);
echo $jsonData."\n";
See the output
The json_encode() function returns a JSON encoded string on success or FALSE on failure.
PHP json_encode() with showing some options
See the following code.
',"'bar'",'"baz"','&blong&', "\xc3\xa9");

echo "Normal: ",  json_encode($a), "\n";
echo "Tags: ",    json_encode($a, JSON_HEX_TAG), "\n";
echo "Apos: ",    json_encode($a, JSON_HEX_APOS), "\n";
echo "Quot: ",    json_encode($a, JSON_HEX_QUOT), "\n";
echo "Amp: ",     json_encode($a, JSON_HEX_AMP), "\n";
echo "Unicode: ", json_encode($a, JSON_UNESCAPED_UNICODE), "\n";
echo "All: ",     json_encode($a, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP | JSON_UNESCAPED_UNICODE), "\n\n";

$b = array();

echo "Empty array output as array: ", json_encode($b), "\n";
echo "Empty array output as object: ", json_encode($b, JSON_FORCE_OBJECT), "\n\n";

$c = array(array(1,2,3));

echo "Non-associative array output as array: ", json_encode($c), "\n";
echo "Non-associative array output as object: ", json_encode($c, JSON_FORCE_OBJECT), "\n\n";

$d = array('foo' => 'bar', 'baz' => 'long');

echo "Associative array always output as object: ", json_encode($d), "\n";
echo "Associative array always output as object: ", json_encode($d, JSON_FORCE_OBJECT), "\n\n";
We have passed an
options parameter to the json_encode() function in the above code.



The various options are Bitmask consisting of JSON_HEX_QUOT, JSON_HEX_TAG, JSON_HEX_AMP, JSON_HEX_APOS, JSON_NUMERIC_CHECK,JSON_PRETTY_PRINT, JSON_UNESCAPED_SLASHES, JSON_FORCE_OBJECT, JSON_PRESERVE_ZERO_FRACTION,JSON_UNESCAPED_UNICODE, JSON_PARTIAL_OUTPUT_ON_ERROR, JSON_UNESCAPED_LINE_TERMINATORS,JSON_THROW_ON_ERROR. 
The output of the
above code is following.
That’s it for this tutorial.
 

			
How can I get JSON encoded data in PHP?
			
To receive JSON string we can use the “php://input” along with the function file_get_contents() which helps us receive JSON data as a file and read it into a string. Later, we can use the json_decode() function to decode the JSON string.
		
			
What is JSON encoding?
			
The default encoding is UTF-8, and JSON texts that are encoded in UTF-8 are interoperable in the sense that they will be read successfully by the maximum number of implementations; there are many implementations that cannot successfully read texts in other encodings (such as UTF-16 and UTF-32).
		
			
What is json_encode function in PHP?
			
The json_encode() function is used to encode a value to JSON format.
		
			
How do you encode an indexed array into a JSON array?
			
To convert PHP array to JSON, use the json_encode() function. The json_encode() is a built-in PHP function that converts an array to json. The json_encode() function returns the string containing a JSON equivalent of the value passed to it, as demonstrated by the numerically indexed array.