wp_send_json

Send a JSON response back to an Ajax request.

Description

wp_send_json( (mixed) $response, (null) $status_code = null );

Parameters (2)

0. $response (mixed): Variable (usually an array or object) to encode as JSON, then print and die.
1. $status_code — Optional. (null) => null: The HTTP status code to output.

Usage

if ( !function_exists( 'wp_send_json' ) ) { 
    require_once ABSPATH . WPINC . '/functions.php'; 
} 
  
// Variable (usually an array or object) to encode as JSON, 
// then print and die. 
$response = null; 
  
// The HTTP status code to output. 
$status_code = null; 
  
// NOTICE! Understand what this does before running. 
$result = wp_send_json($response, $status_code);

Defined (1)

The function is defined in the following location(s).

/wp-includes/functions.php

function wp_send_json( $response, $status_code = null ) { 
    @header( 'Content-Type: application/json; charset=' . get_option( 'blog_charset' ) ); 
    if ( null !== $status_code ) { 
        status_header( $status_code ); 
    } 
    echo wp_json_encode( $response ); 
 
    if ( wp_doing_ajax() ) { 
        wp_die( '', '', array( 
            'response' => null,  
 ) ); 
    } else { 
        die; 
    } 
}