PHP | json_encode() Function
Last Updated :
17 Jun, 2019
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The json_encode() function is an inbuilt function in PHP which is used to convert PHP array or object into JSON representation.
Syntax :
string json_encode( $value, $option, $depth )
Parameters:
- $value: It is a mandatory parameter which defines the value to be encoded.
- $option: It is optional parameter which defines the Bitmask consisting of JSON_FORCE_OBJECT, JSON_HEX_QUOT, JSON_HEX_TAG, JSON_HEX_AMP, JSON_HEX_APOS, JSON_INVALID_UTF8_IGNORE, JSON_INVALID_UTF8_SUBSTITUTE, JSON_NUMERIC_CHECK, JSON_PARTIAL_OUTPUT_ON_ERROR, JSON_PRESERVE_ZERO_FRACTION, JSON_PRETTY_PRINT, JSON_UNESCAPED_LINE_TERMINATORS, JSON_UNESCAPED_SLASHES, JSON_UNESCAPED_UNICODE, JSON_THROW_ON_ERROR.
- $depth: It is optional parameter which sets the maximum depth. Its value must be greater than zero.
Return Value: This function returns a JSON representation on success or false on failure.
Example 1: This example encodes PHP array into JSON representation.
<?php // Declare an array $value = array( "name"=>"GFG", "email"=>"abc@gfg.com"); // Use json_encode() function $json = json_encode($value); // Display the output echo($json); ?> |
Output:
{"name":"GFG","email":"abc@gfg.com"}
Example 2: This example encodes PHP multidimensional array into JSON representation.
<?php // Declare multi-dimensional array $value = array( "name"=>"GFG", array( "email"=>"abc@gfg.com", "mobile"=>"XXXXXXXXXX" ) ); // Use json_encode() function $json = json_encode($value); // Display the output echo($json); ?> |
Output:
{"name":"GFG","0":{"email":"abc@gfg.com","mobile":"XXXXXXXXXX"}}
Example 3: This example encodes PHP objects into JSON representation.
<?php // Declare class class GFG { } // Declare an object $value = new GFG(); // Set the object elements $value->organisation = "GeeksforGeeks"; $value->email = "feedback@geeksforgeeks.org"; // Use json_encode() function $json = json_encode($value); // Display the output echo($json); ?> |
Output:
{"organisation":"GeeksforGeeks","email":"feedback@geeksforgeeks.org"}
Reference: https://www.php.net/manual/en/function.json-encode.php
