<?php
/**
 * Confirms that the activation key that is sent in an email after a user signs
 * up for a new site matches the key for that user and then displays confirmation.
 *
 * @package WordPress
 */

define( 'WP_INSTALLING', true );

/** Sets up the WordPress Environment. */
require __DIR__ . '/wp-load.php';

require __DIR__ . '/wp-blog-header.php';

if ( ! is_multisite() ) {
	wp_redirect( wp_registration_url() );
	die();
}

$valid_error_codes = array( 'already_active', 'blog_taken' );

list( $activate_path ) = explode( '?', wp_unslash( $_SERVER['REQUEST_URI'] ) );
$activate_cookie       = 'wp-activate-' . COOKIEHASH;

$key    = '';
$result = null;

if ( isset( $_GET['key'] ) && isset( $_POST['key'] ) && $_GET['key'] !== $_POST['key'] ) {
	wp_die( __( 'A key value mismatch has been detected. Please follow the link provided in your activation email.' ), __( 'An error occurred during the activation' ), 400 );
} elseif ( ! empty( $_GET['key'] ) ) {
	$key = $_GET['key'];
} elseif ( ! empty( $_POST['key'] ) ) {
	$key = $_POST['key'];
}

if ( $key ) {
	$redirect_url = remove_query_arg( 'key' );

	if ( remove_query_arg( false ) !== $redirect_url ) {
		setcookie( $activate_cookie, $key, 0, $activate_path, COOKIE_DOMAIN, is_ssl(), true );
		wp_safe_redirect( $redirect_url );
		exit;
	} else {
		$result = wpmu_activate_signup( $key );
	}
}

if ( null === $result && isset( $_COOKIE[ $activate_cookie ] ) ) {
	$key    = $_COOKIE[ $activate_cookie ];
	$result = wpmu_activate_signup( $key );
	setcookie( $activate_cookie, ' ', time() - YEAR_IN_SECONDS, $activate_path, COOKIE_DOMAIN, is_ssl(), true );
}

if ( null === $result || ( is_wp_error( $result ) && 'invalid_key' === $result->get_error_code() ) ) {
	status_header( 404 );
} elseif ( is_wp_error( $result ) ) {
	$error_code = $result->get_error_code();

	if ( ! in_array( $error_code, $valid_error_codes, true ) ) {
		status_header( 400 );
	}
}

nocache_headers();

if ( is_object( $wp_object_cache ) ) {
	$wp_object_cache->cache_enabled = false;
}

// Fix for page title.
$wp_query->is_404 = false;

/**
 * Fires before the Site Activation page is loaded.
 *
 * @since 3.0.0
 */
do_action( 'activate_header' );

/**
 * Adds an action hook specific to this page.
 *
 * Fires on {@see 'wp_head'}.
 *
 * @since MU (3.0.0)
 */
function do_activate_header() {
	/**
	 * Fires before the Site Activation page is loaded.
	 *
	 * Fires on the {@see 'wp_head'} action.
	 *
	 * @since 3.0.0
	 */
	do_action( 'activate_wp_head' );
}
add_action( 'wp_head', 'do_activate_header' );

/**
 * Loads styles specific to this page.
 *
 * @since MU (3.0.0)
 */
function wpmu_activate_stylesheet() {
	?>
	<style type="text/css">
		form { margin-top: 2em; }
		#submit, #key { width: 90%; font-size: 24px; }
		#language { margin-top: .5em; }
		.error { background: #f66; }
		span.h3 { padding: 0 8px; font-size: 1.3em; font-weight: 600; }
	</style>
	<?php
}
add_action( 'wp_head', 'wpmu_activate_stylesheet' );
add_action( 'wp_head', 'wp_sensitive_page_meta' );

get_header( 'wp-activate' );

$blog_details = get_blog_details();
?>

<div id="signup-content" class="widecolumn">
	<div class="wp-activate-container">
	<?php if ( ! $key ) { ?>

		<h2><?php _e( 'Activation Key Required' ); ?></h2>
		<form name="activateform" id="activateform" method="post" action="<?php echo network_site_url( $blog_details->path . 'wp-activate.php' ); ?>">
			<p>
				<label for="key"><?php _e( 'Activation Key:' ); ?></label>
				<br /><input type="text" name="key" id="key" value="" size="50" />
			</p>
			<p class="submit">
				<input id="submit" type="submit" name="Submit" class="submit" value="<?php esc_attr_e( 'Activate' ); ?>" />
			</p>
		</form>

		<?php
	} else {
		if ( is_wp_error( $result ) && in_array( $result->get_error_code(), $valid_error_codes, true ) ) {
			$signup = $result->get_error_data();
			?>
			<h2><?php _e( 'Your account is now active!' ); ?></h2>
			<?php
			echo '<p class="lead-in">';
			if ( '' === $signup->domain . $signup->path ) {
				printf(
					/* translators: 1: Login URL, 2: Username, 3: User email address, 4: Lost password URL. */
					__( 'Your account has been activated. You may now <a href="%1$s">log in</a> to the site using your chosen username of &#8220;%2$s&#8221;. Please check your email inbox at %3$s for your password and login instructions. If you do not receive an email, please check your junk or spam folder. If you still do not receive an email within an hour, you can <a href="%4$s">reset your password</a>.' ),
					network_site_url( $blog_details->path . 'wp-login.php', 'login' ),
					$signup->user_login,
					$signup->user_email,
					wp_lostpassword_url()
				);
			} else {
				printf(
					/* translators: 1: Site URL, 2: Username, 3: User email address, 4: Lost password URL. */
					__( 'Your site at %1$s is active. You may now log in to your site using your chosen username of &#8220;%2$s&#8221;. Please check your email inbox at %3$s for your password and login instructions. If you do not receive an email, please check your junk or spam folder. If you still do not receive an email within an hour, you can <a href="%4$s">reset your password</a>.' ),
					sprintf( '<a href="http://%1$s%2$s">%1$s%2$s</a>', $signup->domain, $blog_details->path ),
					$signup->user_login,
					$signup->user_email,
					wp_lostpassword_url()
				);
			}
			echo '</p>';
		} elseif ( null === $result || is_wp_error( $result ) ) {
			?>
			<h2><?php _e( 'An error occurred during the activation' ); ?></h2>
			<?php if ( is_wp_error( $result ) ) : ?>
				<p><?php echo $result->get_error_message(); ?></p>
			<?php endif; ?>
			<?php
		} else {
			$url  = isset( $result['blog_id'] ) ? get_home_url( (int) $result['blog_id'] ) : '';
			$user = get_userdata( (int) $result['user_id'] );
			?>
			<h2><?php _e( 'Your account is now active!' ); ?></h2>

			<div id="signup-welcome">
			<p><span class="h3"><?php _e( 'Username:' ); ?></span> <?php echo $user->user_login; ?></p>
			<p><span class="h3"><?php _e( 'Password:' ); ?></span> <?php echo $result['password']; ?></p>
			</div>

			<?php
			if ( $url && network_home_url( '', 'http' ) !== $url ) :
				switch_to_blog( (int) $result['blog_id'] );
				$login_url = wp_login_url();
				restore_current_blog();
				?>
				<p class="view">
				<?php
					/* translators: 1: Site URL, 2: Login URL. */
					printf( __( 'Your account is now activated. <a href="%1$s">View your site</a> or <a href="%2$s">Log in</a>' ), $url, esc_url( $login_url ) );
				?>
				</p>
			<?php else : ?>
				<p class="view">
				<?php
					printf(
						/* translators: 1: Login URL, 2: Network home URL. */
						__( 'Your account is now activated. <a href="%1$s">Log in</a> or go back to the <a href="%2$s">homepage</a>.' ),
						network_site_url( $blog_details->path . 'wp-login.php', 'login' ),
						network_home_url( $blog_details->path )
					);
				?>
				</p>
				<?php
				endif;
		}
	}
	?>
	</div>
</div>
<script type="text/javascript">
	var key_input = document.getElementById('key');
	key_input && key_input.focus();
</script>
<?php
get_footer( 'wp-activate' );
 

PHP Online Compiler

Write, Run & Share PHP code online using OneCompiler's PHP online compiler for free. It's one of the robust, feature-rich online compilers for PHP language, running on the latest version 7. Getting started with the OneCompiler's PHP compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as PHP and start coding.

Taking inputs (stdin)

OneCompiler's PHP online editor supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample PHP program which takes name as input and prints hello message with your name.

<?php
	fscanf(STDIN, "%s\n", $name);           
    echo "Hello ".$name.".\n";
?>

About PHP

PHP(Hypertext Preprocessor) is widely used server sripting language by Rasmus Lerdorf in the year 1994.

Key features

  • Free
  • powerful tool for making dynamic and interactive web pages
  • can integrate with almost all popular databases like MySQL, PostgreSQL, Oracle, Sybase, Informix, Microsoft SQL Server etc.
  • C like Syntax and easy to learn.
  • Object oriented scripting language.
  • easily embeddable into HTML
  • Loosely typed language.

Syntax help

Variables

In PHP, there is no need to explicitly declare variables to reserve memory space. When you assign a value to a variable, declaration happens automatically. Variables are case-sensitive in PHP.

$variable_name = value;  

Loops

1. IF Family:

If, If-else, Nested-Ifs are used when you want to perform a certain set of operations based on conditional expressions.

If

if(conditional-expression){    
//code    
} 

If-else

if(conditional-expression){  
//code if condition is true  
} else {  
//code if condition is false  
} 

Nested-If-else

if(condition-expression1) {  
    //code if above condition is true  
} elseif(condition-expression2){  
    //code if above condition is true  
}  
elseif(condition-expression3) {  
    //code if above condition is true  
}  
...  
else {  
    //code if all the conditions are false  
}  

2. Switch:

Switch is used to execute one set of statement from multiple conditions.

switch(conditional-expression) {    
case value1:    
 // code if the above value is matched    
 break;  // optional  
case value2:    
 // code if the above value is matched    
 break;  // optional  
...    
    
default:     
 // code to be executed when all the above cases are not matched;    
} 
 

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  // code  
} 

For-each:

// you can use any of the below syntax
foreach ($array as $element-value) {  
    //code  
}

foreach ($array as $key => $element-value) {   
    //code 
} 

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while(condition) {  
 // code 
}  

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {
  // code 
} while (condition); 

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity.

How to define a Function

function function_name(parameters) {  
  //code
}

How to call a Function

function_name (parameters)