freeCodeCamp/guide/russian/php/basic-syntax/index.md

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---
title: Basic Syntax
localeTitle: Основной синтаксис
---
# Основной синтаксис
Сценарий PHP можно разместить где угодно в документе.
Сценарий PHP начинается с `<?php` и заканчивается на `?>`
Ниже приведен пример простого PHP-файла с PHP-скриптом, который использует встроенную функцию PHP «echo» для вывода текста «Hello World!». на веб-странице
\`\` \`\` \`
# Моя первая страница PHP
```
The output of that would be :
```
Моя первая страница PHP
Привет, мир!
```
#### Note: PHP statements end with a semicolon (;).
# Comments in PHP
PHP supports several ways of commenting:
```
```
# PHP Case Sensitivity
In PHP, all keywords (eg if, else, while, echo, etc.), classes, functions, and user-defined functions are NOT case-sensitive.
In the example below, all three echo statements below are legal (and equal):
```
```
### However; all variable names are case-sensitive.
In the example below, only the first statement will display the value of the $color variable (this is because $color, $COLOR, and $coLOR are treated as three different variables):
```
\`\` \`\` \`