php-js-pretty-printer

This project allows you to "prettily" generate JS syntax (separators and line breaks included) through PHP classes.

It differs from json_encode due to its capability of printing raw js as well as strings.

Installation

Include it via Composer:

composer require matheusab/php-js-pretty-printer

Usage

Let's suppose you need to print a javascript object that contains strings, functions, arrays and objects as values. You can do it like so:

use MAB\JS\JS;

$js = JS::object([
    'string'  => 'myStringValue',
    'rawJS'   => JS::raw("() => {}"),
    'array1'  => [1, 2, 3],
    'array2'  => JS::array(1, 2, 3), // same as array1
    'array3'  => JS::array(1, 2, 3)->breakLine(),
    'object1' => [
        'a' => 1,
        'b' => 2
    ],
    'object2' => JS::object([ //same as object1
        'a' => 1,
        'b' => 2
    ]),
]);

echo $js;

Result:

{
    "myString": "myStringValue",
    "myCallback": () => {},
    "array1": [1, 2, 3],
    "array2": [1, 2, 3],
    "array3": [
        1,
        2,
        3
    ],
    "object1": {
        "a": 1,
        "b": 2
    },
    "object2": {
        "a": 1,
        "b": 2
    }
}

API

Through the main class, JS, you have access to the following creational methods:

Method	Arguments	Return type
format	array $lines, int $level = 0	string
array	...$items	JSArray
object	?array $object = []	JSObject
raw	string $js	Raw

Formatting

Call ->format() on a JSArray or JSObject or use JS::format($lines), like so:

<?php

use MAB\JS\JS;

echo JS::object($map)->format();
echo JS::array(...$values)->format();
echo JS::format($lines);

Features

Arrays and objects

ArrayAccess

JSArray and JSObject classes implement ArrayAccess, allowing you to push or access values using PHP's array access syntax:

Object access example:

$object = JS::object();
$object['a'] = 1;

// equivalent to

$object = JS::object(['a' => 1]); 

Array access example:

$array = JS::array(1);

// equivalent to

$array = JS::array();
$array[] = 1;

Casting to string:

Both classes also implement __toString(), which calls the format method.

echo JS::object();

// is equivalent to

echo JS::object()->format();

Nesting and indentation

You can use arrays, strings, and Raw, JSObject and JSArray objects as values of instances of JSArray and JSObject.

Nesting level is considered for indentation so that generated javascript is always properly (prettily) generated.

Example:

echo JS::object([
    'a' => [
        'a_a' => 1,
        'a_b' => 2,
    ],
    'b' => JS::object([
        'b_a' => 1,
        'b_b' => 2
    ])
]);

outputs:

{
    "a": {
    "a_a": 1,
        "a_b": 2
    },
    "b": {
    "b_a": 1,
        "b_b": 2
    }
}

Initial indentation level

You can change it in arrays and objects by calling the indent($level = 1) method.