Javascript to PHP

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How to convert from Javascript to PHP


If you're comfortable writing code in JavaScript but find yourself needing to convert it to PHP, you're in the right place. PHP is a versatile and widely-used server-side scripting language that powers a large portion of the internet. This guide will walk you through the process of converting JavaScript code to PHP, helping you adapt to the server-side marvel that is PHP.

Understanding the Key Differences

Before diving into the conversion process, it's crucial to understand the primary differences between JavaScript and PHP:

  1. Execution Environment: JavaScript typically runs in the client's browser, while PHP is executed on the server.
  2. Syntax Style: While both are scripting languages, their syntax and functions differ significantly.
  3. Function Libraries: JavaScript and PHP have different built-in functions and ways to handle various tasks like string manipulation and data structures.

Variable Declarations

In JavaScript, variables are declared using var, let, or const. In PHP, variables are declared with a dollar sign ($).

JavaScript Example:

let count = 10;
const PI = 3.14;

PHP Conversion:

$count = 10;
define('PI', 3.14);

Data Types and Structures

PHP and JavaScript both support arrays and objects, but they are handled differently.

JavaScript Array:

let fruits = ["Apple", "Banana", "Cherry"];

PHP Conversion:

$fruits = array("Apple", "Banana", "Cherry");

JavaScript Object:

let person = { firstName: "John", lastName: "Doe" };

PHP Conversion:

$person = (object) array('firstName' => 'John', 'lastName' => 'Doe');


Function declarations in both languages are somewhat similar but have different constructs for defining and calling them.

JavaScript Function:

function greet(name) {
    return "Hello, " + name;

PHP Conversion:

function greet($name) {
    return "Hello, " . $name;

Conditional Statements

Conditional statements have closely related syntax in both languages, but small changes are necessary during the conversion.

JavaScript Conditional:

if (score >= 50) {
} else {

PHP Conversion:

if ($score >= 50) {
    echo "Passed";
} else {
    echo "Failed";


Both JavaScript and PHP support for, while, and foreach loops, but their syntax may need slight adjustments.

JavaScript For Loop:

for (let i = 0; i < 5; i++) {

PHP Conversion:

for ($i = 0; $i < 5; $i++) {
    echo $i;

String Manipulation

String operations differ slightly between JavaScript and PHP, especially when it comes to concatenation and manipulation functions.

JavaScript String Concatenation:

let welcomeMessage = "Hello, " + name + "!";

PHP Conversion:

$welcomeMessage = "Hello, " . $name . "!";

Handling JSON

Both JavaScript and PHP can handle JSON data, but their methods and functions for doing so differ.

JavaScript JSON Handling:

let jsonString = JSON.stringify(someObject);
let someObject = JSON.parse(jsonString);

PHP Conversion:

$jsonString = json_encode($someObject);
$someObject = json_decode($jsonString);


Transitioning from JavaScript to PHP may seem challenging at first, but with a clear understanding of syntax and functional differences, the process becomes significantly easier. This guide provides you with the foundation needed to convert your JavaScript code into PHP efficiently.

For detailed learning, consistent practice, and deeper understanding, exploring PHP-specific functions and libraries will be beneficial. Happy coding!

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