Check if a "JSON" is a valid JSON

readme.md

Example code

$json_valid = wp_json_error( $json );

if ( ! is_wp_error( $json_valid ) ) {
	print_r( $json_valid ); // Show $json
} else {
	print_r( $json_valid ); // Show Error
}

functions.php

<?php
function wp_json_error( $json ){
	$json_error = false;
	$json_decode = json_decode( $json, true );

	if ( json_last_error() === JSON_ERROR_NONE ) {
		if ( !empty( $json ) ){
			$json = $json_decode;
		} else {
			$json = $json;
		}
	} else {
		$json_error = true;
	}

	if ( false !== $json_error ) {
		return new WP_Error( 'no_json', __( 'Invalid JSON Provided.' ) );
	} else {
		return $json;
	}
}