var json = $global.JSON var retVal try { if (typeof json === 'object' && typeof json.stringify === 'function') { // Errors will not be caught here if our own equivalent to resource retVal = json.stringify(mixedVal) if (retVal === undefined) { thrownewSyntaxError('json_encode') } return retVal }
var value = mixedVal
var quote = function (string) { var escapeChars = [ '\u0000-\u001f', '\u007f-\u009f', '\u00ad', '\u0600-\u0604', '\u070f', '\u17b4', '\u17b5', '\u200c-\u200f', '\u2028-\u202f', '\u2060-\u206f', '\ufeff', '\ufff0-\uffff' ].join('') var escapable = newRegExp('[\\"' + escapeChars + ']', 'g') var meta = { // table of character substitutions '\b': '\\b', '\t': '\\t', '\n': '\\n', '\f': '\\f', '\r': '\\r', '"': '\\"', '\\': '\\\\' }
escapable.lastIndex = 0 return escapable.test(string) ? '"' + string.replace(escapable, function (a) { var c = meta[a] returntypeof c === 'string' ? c : '\\u' + ('0000' + a.charCodeAt(0) .toString(16)) .slice(-4) }) + '"' : '"' + string + '"' }
var _str = function (key, holder) { var gap = '' var indent = ' ' // The loop counter. var i = 0 // The member key. var k = '' // The member value. var v = '' var length = 0 var mind = gap var partial = [] var value = holder[key]
// If the value has a toJSON method, call it to obtain a replacement value. if (value && typeof value === 'object' && typeof value.toJSON === 'function') { value = value.toJSON(key) }
// What happens next depends on the value's type. switch (typeof value) { case'string': return quote(value)
case'number': // JSON numbers must be finite. Encode non-finite numbers as null. returnisFinite(value) ? String(value) : 'null'
case'boolean': case'null': // If the value is a boolean or null, convert it to a string. Note: // typeof null does not produce 'null'. The case is included here in // the remote chance that this gets fixed someday. returnString(value)
case'object': // If the type is 'object', we might be dealing with an object or an array or // null. // Due to a specification blunder in ECMAScript, typeof null is 'object', // so watch out for that case. if (!value) { return'null' }
// Make an array to hold the partial results of stringifying this object value. gap += indent partial = []
// Is the value an array? if (Object.prototype.toString.apply(value) === '[object Array]') { // The value is an array. Stringify every element. Use null as a placeholder // for non-JSON values. length = value.length for (i = 0; i < length; i += 1) { partial[i] = _str(i, value) || 'null' }
// Join all of the elements together, separated with commas, and wrap them in // brackets. v = partial.length === 0 ? '[]' : gap ? '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']' : '[' + partial.join(',') + ']' gap = mind return v }
// Iterate through all of the keys in the object. for (k in value) { if (Object.hasOwnProperty.call(value, k)) { v = _str(k, value) if (v) { partial.push(quote(k) + (gap ? ': ' : ':') + v) } } }
// Join all of the member texts together, separated with commas, // and wrap them in braces. v = partial.length === 0 ? '{}' : gap ? '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}' : '{' + partial.join(',') + '}' gap = mind return v case'undefined': case'function': default: thrownewSyntaxError('json_encode') } }
// Make a fake root object containing our value under the key of ''. // Return the result of stringifying the value. return _str('', { '': value }) } catch (err) { // @todo: ensure error handling above throws a SyntaxError in all cases where it could // (i.e., when the JSON global is not available and there is an error) if (!(err instanceofSyntaxError)) { thrownewError('Unexpected error type in json_encode()') } // usable by json_last_error() $locutus.php.last_error_json = 4 returnnull } }
You you can install via npm install locutus and
require it via require('locutus/php/json/json_encode').
You could also require the json module in full
so that you could access json.json_encode instead.
If you intend to target the browser, you can then use a module bundler such as
Browserify,
webpack or
rollup.js.
ES5/ES6
This function targets ES5, but as of Locutus 2.0.2 we also support
ES6 functions. Locutus transpiles to ES5 before publishing to npm.
A community effort
Not unlike Wikipedia, Locutus is an ongoing community effort. Our philosophy follows
The McDonald’s Theory.
This means that we don't consider it to be a bad thing that many of
our functions are first iterations, which may still have their
fair share of issues. We hope that these flaws will inspire others to come up with better ideas.
This way of working also means that we don't offer any
production guarantees, and recommend to use Locutus inspiration
and learning purposes only.
Examples
Please note that these examples are distilled from test cases that automatically verify
our functions still work correctly. This could explain some quirky ones.