locutus/esm/php/json/json_decode.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

import { setPhpRuntimeEntry } from "../_helpers/_phpRuntimeState.js";
export function json_decode(strJson) {
    //       discuss at: https://phpjs.org/functions/json_decode/
    //  parity verified: PHP 8.3
    //      original by: Public Domain (https://www.json.org/json2.js)
    // reimplemented by: Kevin van Zonneveld (https://kevin.vanzonneveld.net)
    //      improved by: T.J. Leahy
    //      improved by: Michael White
    //           note 1: Uses the host JSON.parse implementation required by Locutus' runtime target.
    //        example 1: json_decode('[ 1 ]')
    //        returns 1: [1]
    const json = typeof JSON === 'object' && JSON !== null ? JSON : null;
    const parse = json?.parse;
    if (typeof parse !== 'function') {
        setPhpRuntimeEntry('last_error_json', 4);
        return null;
    }
    try {
        const parsed = parse.call(json, strJson);
        setPhpRuntimeEntry('last_error_json', 0);
        return parsed;
    }
    catch (err) {
        if (!(err instanceof SyntaxError)) {
            throw new Error('Unexpected error type in json_decode()');
        }
        // usable by json_last_error()
        setPhpRuntimeEntry('last_error_json', 4);
        return null;
    }
}