<?php
/**
 * Retrieves and creates the wp-config.php file.
 *
 * The permissions for the base directory must allow for writing files in order
 * for the wp-config.php to be created using this page.
 *
 * @package WordPress
 * @subpackage Administration
 */

/**
 * We are installing.
 */
define( 'WP_INSTALLING', true );

/**
 * We are blissfully unaware of anything.
 */
define( 'WP_SETUP_CONFIG', true );

/**
 * Disable error reporting
 *
 * Set this to error_reporting( -1 ) for debugging
 */
error_reporting( 0 );

if ( ! defined( 'ABSPATH' ) ) {
	define( 'ABSPATH', dirname( __DIR__ ) . '/' );
}

require ABSPATH . 'wp-settings.php';

/** Load WordPress Administration Upgrade API */
require_once ABSPATH . 'wp-admin/includes/upgrade.php';

/** Load WordPress Translation Installation API */
require_once ABSPATH . 'wp-admin/includes/translation-install.php';

nocache_headers();

// Support wp-config-sample.php one level up, for the develop repo.
if ( file_exists( ABSPATH . 'wp-config-sample.php' ) ) {
	$config_file = file( ABSPATH . 'wp-config-sample.php' );
} elseif ( file_exists( dirname( ABSPATH ) . '/wp-config-sample.php' ) ) {
	$config_file = file( dirname( ABSPATH ) . '/wp-config-sample.php' );
} else {
	wp_die(
		sprintf(
			/* translators: %s: wp-config-sample.php */
			__( 'Sorry, I need a %s file to work from. Please re-upload this file to your WordPress installation.' ),
			'<code>wp-config-sample.php</code>'
		)
	);
}

// Check if wp-config.php has been created.
if ( file_exists( ABSPATH . 'wp-config.php' ) ) {
	wp_die(
		'<p>' . sprintf(
			/* translators: 1: wp-config.php, 2: install.php */
			__( 'The file %1$s already exists. If you need to reset any of the configuration items in this file, please delete it first. You may try <a href="%2$s">installing now</a>.' ),
			'<code>wp-config.php</code>',
			'install.php'
		) . '</p>',
		409
	);
}

// Check if wp-config.php exists above the root directory but is not part of another installation.
if ( @file_exists( ABSPATH . '../wp-config.php' ) && ! @file_exists( ABSPATH . '../wp-settings.php' ) ) {
	wp_die(
		'<p>' . sprintf(
			/* translators: 1: wp-config.php, 2: install.php */
			__( 'The file %1$s already exists one level above your WordPress installation. If you need to reset any of the configuration items in this file, please delete it first. You may try <a href="%2$s">installing now</a>.' ),
			'<code>wp-config.php</code>',
			'install.php'
		) . '</p>',
		409
	);
}

$step = isset( $_GET['step'] ) ? (int) $_GET['step'] : -1;

/**
 * Display setup wp-config.php file header.
 *
 * @ignore
 * @since 2.3.0
 *
 * @global string    $wp_local_package Locale code of the package.
 * @global WP_Locale $wp_locale        WordPress date and time locale object.
 *
 * @param string|string[] $body_classes Class attribute values for the body tag.
 */
function setup_config_display_header( $body_classes = array() ) {
	$body_classes   = (array) $body_classes;
	$body_classes[] = 'wp-core-ui';
	$dir_attr       = '';
	if ( is_rtl() ) {
		$body_classes[] = 'rtl';
		$dir_attr       = ' dir="rtl"';
	}

	header( 'Content-Type: text/html; charset=utf-8' );
	?>
<!DOCTYPE html>
<html<?php echo $dir_attr; ?>>
<head>
	<meta name="viewport" content="width=device-width" />
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<meta name="robots" content="noindex,nofollow" />
	<title><?php _e( 'WordPress &rsaquo; Setup Configuration File' ); ?></title>
	<?php wp_admin_css( 'install', true ); ?>
</head>
<body class="<?php echo implode( ' ', $body_classes ); ?>">
<p id="logo"><?php _e( 'WordPress' ); ?></p>
	<?php
} // End function setup_config_display_header();

$language = '';
if ( ! empty( $_REQUEST['language'] ) ) {
	$language = preg_replace( '/[^a-zA-Z0-9_]/', '', $_REQUEST['language'] );
} elseif ( isset( $GLOBALS['wp_local_package'] ) ) {
	$language = $GLOBALS['wp_local_package'];
}

switch ( $step ) {
	case -1:
		if ( wp_can_install_language_pack() && empty( $language ) ) {
			$languages = wp_get_available_translations();
			if ( $languages ) {
				setup_config_display_header( 'language-chooser' );
				echo '<h1 class="screen-reader-text">Select a default language</h1>';
				echo '<form id="setup" method="post" action="?step=0">';
				wp_install_language_form( $languages );
				echo '</form>';
				break;
			}
		}

		// Deliberately fall through if we can't reach the translations API.

	case 0:
		if ( ! empty( $language ) ) {
			$loaded_language = wp_download_language_pack( $language );
			if ( $loaded_language ) {
				load_default_textdomain( $loaded_language );
				$GLOBALS['wp_locale'] = new WP_Locale();
			}
		}

		setup_config_display_header();
		$step_1 = 'setup-config.php?step=1';
		if ( isset( $_REQUEST['noapi'] ) ) {
			$step_1 .= '&amp;noapi';
		}
		if ( ! empty( $loaded_language ) ) {
			$step_1 .= '&amp;language=' . $loaded_language;
		}
		?>
<h1 class="screen-reader-text"><?php _e( 'Before getting started' ); ?></h1>
<p><?php _e( 'Welcome to WordPress. Before getting started, we need some information on the database. You will need to know the following items before proceeding.' ); ?></p>
<ol>
	<li><?php _e( 'Database name' ); ?></li>
	<li><?php _e( 'Database username' ); ?></li>
	<li><?php _e( 'Database password' ); ?></li>
	<li><?php _e( 'Database host' ); ?></li>
	<li><?php _e( 'Table prefix (if you want to run more than one WordPress in a single database)' ); ?></li>
</ol>
<p>
		<?php
		printf(
			/* translators: %s: wp-config.php */
			__( 'We&#8217;re going to use this information to create a %s file.' ),
			'<code>wp-config.php</code>'
		);
		?>
	<strong>
		<?php
		printf(
			/* translators: 1: wp-config-sample.php, 2: wp-config.php */
			__( 'If for any reason this automatic file creation doesn&#8217;t work, don&#8217;t worry. All this does is fill in the database information to a configuration file. You may also simply open %1$s in a text editor, fill in your information, and save it as %2$s.' ),
			'<code>wp-config-sample.php</code>',
			'<code>wp-config.php</code>'
		);
		?>
	</strong>
		<?php
		printf(
			/* translators: %s: Documentation URL. */
			__( 'Need more help? <a href="%s">We got it</a>.' ),
			__( 'https://wordpress.org/support/article/editing-wp-config-php/' )
		);
		?>
</p>
<p><?php _e( 'In all likelihood, these items were supplied to you by your Web Host. If you don&#8217;t have this information, then you will need to contact them before you can continue. If you&#8217;re all ready&hellip;' ); ?></p>

<p class="step"><a href="<?php echo $step_1; ?>" class="button button-large"><?php _e( 'Let&#8217;s go!' ); ?></a></p>
		<?php
		break;

	case 1:
		load_default_textdomain( $language );
		$GLOBALS['wp_locale'] = new WP_Locale();

		setup_config_display_header();

		$autofocus = wp_is_mobile() ? '' : ' autofocus';
		?>
<h1 class="screen-reader-text"><?php _e( 'Set up your database connection' ); ?></h1>
<form method="post" action="setup-config.php?step=2">
	<p><?php _e( 'Below you should enter your database connection details. If you&#8217;re not sure about these, contact your host.' ); ?></p>
	<table class="form-table" role="presentation">
		<tr>
			<th scope="row"><label for="dbname"><?php _e( 'Database Name' ); ?></label></th>
			<td><input name="dbname" id="dbname" type="text" aria-describedby="dbname-desc" size="25" value="wordpress"<?php echo $autofocus; ?>/></td>
			<td id="dbname-desc"><?php _e( 'The name of the database you want to use with WordPress.' ); ?></td>
		</tr>
		<tr>
			<th scope="row"><label for="uname"><?php _e( 'Username' ); ?></label></th>
			<td><input name="uname" id="uname" type="text" aria-describedby="uname-desc" size="25" value="<?php echo htmlspecialchars( _x( 'username', 'example username' ), ENT_QUOTES ); ?>" /></td>
			<td id="uname-desc"><?php _e( 'Your database username.' ); ?></td>
		</tr>
		<tr>
			<th scope="row"><label for="pwd"><?php _e( 'Password' ); ?></label></th>
			<td><input name="pwd" id="pwd" type="text" aria-describedby="pwd-desc" size="25" value="<?php echo htmlspecialchars( _x( 'password', 'example password' ), ENT_QUOTES ); ?>" autocomplete="off" /></td>
			<td id="pwd-desc"><?php _e( 'Your database password.' ); ?></td>
		</tr>
		<tr>
			<th scope="row"><label for="dbhost"><?php _e( 'Database Host' ); ?></label></th>
			<td><input name="dbhost" id="dbhost" type="text" aria-describedby="dbhost-desc" size="25" value="localhost" /></td>
			<td id="dbhost-desc">
			<?php
				/* translators: %s: localhost */
				printf( __( 'You should be able to get this info from your web host, if %s doesn&#8217;t work.' ), '<code>localhost</code>' );
			?>
			</td>
		</tr>
		<tr>
			<th scope="row"><label for="prefix"><?php _e( 'Table Prefix' ); ?></label></th>
			<td><input name="prefix" id="prefix" type="text" aria-describedby="prefix-desc" value="wp_" size="25" /></td>
			<td id="prefix-desc"><?php _e( 'If you want to run multiple WordPress installations in a single database, change this.' ); ?></td>
		</tr>
	</table>
		<?php
		if ( isset( $_GET['noapi'] ) ) {
			?>
<input name="noapi" type="hidden" value="1" /><?php } ?>
	<input type="hidden" name="language" value="<?php echo esc_attr( $language ); ?>" />
	<p class="step"><input name="submit" type="submit" value="<?php echo htmlspecialchars( __( 'Submit' ), ENT_QUOTES ); ?>" class="button button-large" /></p>
</form>
		<?php
		break;

	case 2:
		load_default_textdomain( $language );
		$GLOBALS['wp_locale'] = new WP_Locale();

		$dbname = trim( wp_unslash( $_POST['dbname'] ) );
		$uname  = trim( wp_unslash( $_POST['uname'] ) );
		$pwd    = trim( wp_unslash( $_POST['pwd'] ) );
		$dbhost = trim( wp_unslash( $_POST['dbhost'] ) );
		$prefix = trim( wp_unslash( $_POST['prefix'] ) );

		$step_1  = 'setup-config.php?step=1';
		$install = 'install.php';
		if ( isset( $_REQUEST['noapi'] ) ) {
			$step_1 .= '&amp;noapi';
		}

		if ( ! empty( $language ) ) {
			$step_1  .= '&amp;language=' . $language;
			$install .= '?language=' . $language;
		} else {
			$install .= '?language=en_US';
		}

		$tryagain_link = '</p><p class="step"><a href="' . $step_1 . '" onclick="javascript:history.go(-1);return false;" class="button button-large">' . __( 'Try Again' ) . '</a>';

		if ( empty( $prefix ) ) {
			wp_die( __( '<strong>Error</strong>: "Table Prefix" must not be empty.' ) . $tryagain_link );
		}

		// Validate $prefix: it can only contain letters, numbers and underscores.
		if ( preg_match( '|[^a-z0-9_]|i', $prefix ) ) {
			wp_die( __( '<strong>Error</strong>: "Table Prefix" can only contain numbers, letters, and underscores.' ) . $tryagain_link );
		}

		// Test the DB connection.
		/**#@+
		 *
		 * @ignore
		 */
		define( 'DB_NAME', $dbname );
		define( 'DB_USER', $uname );
		define( 'DB_PASSWORD', $pwd );
		define( 'DB_HOST', $dbhost );
		/**#@-*/

		// Re-construct $wpdb with these new values.
		unset( $wpdb );
		require_wp_db();

		/*
		* The wpdb constructor bails when WP_SETUP_CONFIG is set, so we must
		* fire this manually. We'll fail here if the values are no good.
		*/
		$wpdb->db_connect();

		if ( ! empty( $wpdb->error ) ) {
			wp_die( $wpdb->error->get_error_message() . $tryagain_link );
		}

		$errors = $wpdb->hide_errors();
		$wpdb->query( "SELECT $prefix" );
		$wpdb->show_errors( $errors );
		if ( ! $wpdb->last_error ) {
			// MySQL was able to parse the prefix as a value, which we don't want. Bail.
			wp_die( __( '<strong>Error</strong>: "Table Prefix" is invalid.' ) );
		}

		// Generate keys and salts using secure CSPRNG; fallback to API if enabled; further fallback to original wp_generate_password().
		try {
			$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()-_ []{}<>~`+=,.;:/?|';
			$max   = strlen( $chars ) - 1;
			for ( $i = 0; $i < 8; $i++ ) {
				$key = '';
				for ( $j = 0; $j < 64; $j++ ) {
					$key .= substr( $chars, random_int( 0, $max ), 1 );
				}
				$secret_keys[] = $key;
			}
		} catch ( Exception $ex ) {
			$no_api = isset( $_POST['noapi'] );

			if ( ! $no_api ) {
				$secret_keys = wp_remote_get( 'https://api.wordpress.org/secret-key/1.1/salt/' );
			}

			if ( $no_api || is_wp_error( $secret_keys ) ) {
				$secret_keys = array();
				for ( $i = 0; $i < 8; $i++ ) {
					$secret_keys[] = wp_generate_password( 64, true, true );
				}
			} else {
				$secret_keys = explode( "\n", wp_remote_retrieve_body( $secret_keys ) );
				foreach ( $secret_keys as $k => $v ) {
					$secret_keys[ $k ] = substr( $v, 28, 64 );
				}
			}
		}

		$key = 0;
		foreach ( $config_file as $line_num => $line ) {
			if ( '$table_prefix =' === substr( $line, 0, 15 ) ) {
				$config_file[ $line_num ] = '$table_prefix = \'' . addcslashes( $prefix, "\\'" ) . "';\r\n";
				continue;
			}

			if ( ! preg_match( '/^define\(\s*\'([A-Z_]+)\',([ ]+)/', $line, $match ) ) {
				continue;
			}

			$constant = $match[1];
			$padding  = $match[2];

			switch ( $constant ) {
				case 'DB_NAME':
				case 'DB_USER':
				case 'DB_PASSWORD':
				case 'DB_HOST':
					$config_file[ $line_num ] = "define( '" . $constant . "'," . $padding . "'" . addcslashes( constant( $constant ), "\\'" ) . "' );\r\n";
					break;
				case 'DB_CHARSET':
					if ( 'utf8mb4' === $wpdb->charset || ( ! $wpdb->charset && $wpdb->has_cap( 'utf8mb4' ) ) ) {
						$config_file[ $line_num ] = "define( '" . $constant . "'," . $padding . "'utf8mb4' );\r\n";
					}
					break;
				case 'AUTH_KEY':
				case 'SECURE_AUTH_KEY':
				case 'LOGGED_IN_KEY':
				case 'NONCE_KEY':
				case 'AUTH_SALT':
				case 'SECURE_AUTH_SALT':
				case 'LOGGED_IN_SALT':
				case 'NONCE_SALT':
					$config_file[ $line_num ] = "define( '" . $constant . "'," . $padding . "'" . $secret_keys[ $key++ ] . "' );\r\n";
					break;
			}
		}
		unset( $line );

		if ( ! is_writable( ABSPATH ) ) :
			setup_config_display_header();
			?>
	<p>
			<?php
			/* translators: %s: wp-config.php */
			printf( __( 'Unable to write to %s file.' ), '<code>wp-config.php</code>' );
			?>
</p>
<p>
			<?php
			/* translators: %s: wp-config.php */
			printf( __( 'You can create the %s file manually and paste the following text into it.' ), '<code>wp-config.php</code>' );

			$config_text = '';

			foreach ( $config_file as $line ) {
				$config_text .= htmlentities( $line, ENT_COMPAT, 'UTF-8' );
			}
			?>
</p>
<textarea id="wp-config" cols="98" rows="15" class="code" readonly="readonly"><?php echo $config_text; ?></textarea>
<p><?php _e( 'After you&#8217;ve done that, click &#8220;Run the installation&#8221;.' ); ?></p>
<p class="step"><a href="<?php echo $install; ?>" class="button button-large"><?php _e( 'Run the installation' ); ?></a></p>
<script>
(function(){
if ( ! /iPad|iPod|iPhone/.test( navigator.userAgent ) ) {
	var el = document.getElementById('wp-config');
	el.focus();
	el.select();
}
})();
</script>
			<?php
		else :
			/*
			 * If this file doesn't exist, then we are using the wp-config-sample.php
			 * file one level up, which is for the develop repo.
			 */
			if ( file_exists( ABSPATH . 'wp-config-sample.php' ) ) {
				$path_to_wp_config = ABSPATH . 'wp-config.php';
			} else {
				$path_to_wp_config = dirname( ABSPATH ) . '/wp-config.php';
			}

			$error_message = '';
			$handle        = fopen( $path_to_wp_config, 'w' );
			/*
			 * Why check for the absence of false instead of checking for resource with is_resource()?
			 * To future-proof the check for when fopen returns object instead of resource, i.e. a known
			 * change coming in PHP.
			 */
			if ( false !== $handle ) {
				foreach ( $config_file as $line ) {
					fwrite( $handle, $line );
				}
				fclose( $handle );
			} else {
				$wp_config_perms = fileperms( $path_to_wp_config );
				if ( ! empty( $wp_config_perms ) && ! is_writable( $path_to_wp_config ) ) {
					$error_message = sprintf(
						/* translators: 1: wp-config.php, 2: Documentation URL. */
						__( 'You need to make the file %1$s writable before you can save your changes. See <a href="%2$s">Changing File Permissions</a> for more information.' ),
						'<code>wp-config.php</code>',
						__( 'https://wordpress.org/support/article/changing-file-permissions/' )
					);
				} else {
					$error_message = sprintf(
						/* translators: %s: wp-config.php */
						__( 'Unable to write to %s file.' ),
						'<code>wp-config.php</code>'
					);
				}
			}

			chmod( $path_to_wp_config, 0666 );
			setup_config_display_header();

			if ( false !== $handle ) :
				?>
<h1 class="screen-reader-text"><?php _e( 'Successful database connection' ); ?></h1>
<p><?php _e( 'All right, sparky! You&#8217;ve made it through this part of the installation. WordPress can now communicate with your database. If you are ready, time now to&hellip;' ); ?></p>

<p class="step"><a href="<?php echo $install; ?>" class="button button-large"><?php _e( 'Run the installation' ); ?></a></p>
				<?php
			else :
				printf( '<p>%s</p>', $error_message );
			endif;
		endif;
		break;
} // End of the steps switch.
?>
<?php wp_print_scripts( 'language-chooser' ); ?>
</body>
</html>
