PHP - Programming language

PHP, aka Personal Home Page, is a programming language created in 1995 by Rasmus Lerdorf.

Source code:

git clone https://github.com/php/php-src

#9on PLDB

28Years Old

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PHP is a server-side scripting language designed primarily for web development but also used as a general-purpose programming language. Originally created by Rasmus Lerdorf in 1994, the PHP reference implementation is now produced by The PHP Development Team. PHP originally stood for Personal Home Page, but it now stands for the recursive acronym PHP: Hypertext Preprocessor. Read more on Wikipedia...

PHP website
PHP downloads page
PHP Wikipedia page
PHP is developed on GitHub and has 33,991 stars
Watch the history of the PHP repo visualized with Gource
PLDB has 2 documentation sites for PHP: devdocs.io, www.php.net
PHP specs
PHP mailing list
Video demo of PHP
There are at least 3,479,326 PHP repos on GitHub
PHP first developed in Zend
PLDB estimates there are currently 30k job openings for PHP programmers.
file extensions for PHP include php, phtml, php3, php4, php5, php7, phps, aw, ctp, fcgi, inc, phpt and php[345]
PHP on Twitter
The Google BigQuery Public Dataset GitHub snapshot shows 202k users using PHP in 340k repos on GitHub
Check out the 2,012 PHP meetup groups on Meetup.com.
There are 150,168 members in the PHP subreddit
There are 3,210 Project Euler users using PHP
In the 2021 StackOverflow developer survey PHP programmers reported a median salary of $38,916. 22% of respondents reported using PHP. 18,130 programmers reported using PHP, and 8,852 said they wanted to use it
Explore PHP snippets on Rosetta Code
PHP on HOPL
PHP ranks #10 in the TIOBE Index
PHP Ubuntu package
ANTLR grammar for PHP
PHP LSP implementation
CodeMirror package for syntax highlighting PHP
Monaco package for syntax highlighting PHP
Pygments supports syntax highlighting for PHP
GitHub supports syntax highlighting for PHP
PHP appears in the Quine Relay project
PLDB has 2 Jupyter Kernels for PHP: github.com, github.com
There is a central package repository for PHP
Annual Reports for PHP
Release Notes for PHP
Events page for PHP
Indeed.com has 9,017 matches for "php developer".
php.net was registered in 1997
See also: (28 related languages)C, HHVM, Parrot, Java, Perl, Tcl, Falcon, Hack, HTML, X86, Unicode, WordPress, JSON, MySQL, MIME, JavaScript, XML, PIR, CIL, FTP, PostgreSQL, SQLite, AWS, JSP, Linux, Python, MediaWiki, Drupal
Read more about PHP on the web: 1.

Example from Riju:

<?php

echo "Hello, world!\n";

Example from hello-world:

<?php

echo 'Hello World';

Example from the Hello World Collection:

<?php
  // Hello world in PHP
  echo 'Hello World!';
?>

Example from Linguist:

#!/usr/bin/php
<?php

echo "PHP\n";

Example from Wikipedia:

class Person
{
    public $firstName;
    public $lastName;

    public function __construct(string $firstName, string $lastName = '') { // optional second argument
        $this->firstName = $firstName;
        $this->lastName  = $lastName;
    }

    public function greet(): string {
        return 'Hello, my name is ' . $this->firstName .
               (($this->lastName != '') ? (' ' . $this->lastName) : '') . '.';
    }

    public static function staticGreet(string $firstName, string $lastName) {
        return 'Hello, my name is ' . $firstName . ' ' . $lastName . '.';
    }
}

$he    = new Person('John', 'Smith');
$she   = new Person('Sally', 'Davis');
$other = new Person('iAmine');

echo $he->greet(); // prints "Hello, my name is John Smith."
echo '<br />';

echo $she->greet(); // prints "Hello, my name is Sally Davis."
echo '<br />';

echo $other->greet(); // prints "Hello, my name is iAmine."
echo '<br />';

echo Person::staticGreet('Jane', 'Doe'); // prints "Hello, my name is Jane Doe."

PHP Keywords

__CLASS__ __DIR__ __FILE__ __FUNCTION__ __halt_compiler() __LINE__ __METHOD__ __NAMESPACE__ __TRAIT__ abstract and array() as break callable case catch class clone const continue declare default die() do echo else elseif empty() enddeclare endfor endforeach endif endswitch endwhile eval() exit() extends final finally for foreach function global goto if implements include include_once instanceof insteadof interface isset() list() namespace new or print private protected public require require_once return static switch throw trait try unset() use var while xor yield