As the sun rises and the forest mist clears, and the clouds return and the caves darken, these changes of light and shadow are the morning and evening in the mountains. Wildflowers bloom with their subtle fragrance, fine trees flourish with their dense shade, the wind and frost are pure and clean, and the water recedes to reveal the rocks—these are the four seasons in the mountains. Going out in the morning and returning in the evening, the scenery of the four seasons is different, and the joy is endless.至于负者歌于途,行者休于树,前者呼,后者应,伛偻提携,往来而不绝者,滁人游也。临溪而渔,溪深而鱼肥,酿泉为酒,泉香而酒洌,山肴野蔌,杂然而前陈者,太守宴也。宴酣之乐,非丝非竹,射者中,弈者胜,觥筹交错,起坐而喧哗者,众宾欢也。苍颜白发,颓然乎其间者,太守醉也。
<?php
/**
* WP_Importer base class
*/
#[AllowDynamicProperties]
class WP_Importer {
/**
* Class Constructor
*/
public function __construct() {}
/**
* Returns array with imported permalinks from WordPress database.
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $importer_name
* @param string $blog_id
* @return array
*/
public function get_imported_posts( $importer_name, $blog_id ) {
global $wpdb;
$hashtable = array();
$limit = 100;
$offset = 0;
// Grab all posts in chunks.
do {
$meta_key = $importer_name . '_' . $blog_id . '_permalink';
$results = $wpdb->get_results(
$wpdb->prepare(
"SELECT post_id, meta_value FROM $wpdb->postmeta WHERE meta_key = %s LIMIT %d,%d",
$meta_key,
$offset,
$limit
)
);
// Increment offset.
$offset = ( $limit + $offset );
if ( ! empty( $results ) ) {
foreach ( $results as $r ) {
// Set permalinks into array.
$hashtable[ $r->meta_value ] = (int) $r->post_id;
}
}
} while ( count( $results ) === $limit );
return $hashtable;
}
/**
* Returns count of imported permalinks from WordPress database.
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $importer_name
* @param string $blog_id
* @return int
*/
public function count_imported_posts( $importer_name, $blog_id ) {
global $wpdb;
$count = 0;
// Get count of permalinks.
$meta_key = $importer_name . '_' . $blog_id . '_permalink';
$result = $wpdb->get_results(
$wpdb->prepare(
"SELECT COUNT( post_id ) AS cnt FROM $wpdb->postmeta WHERE meta_key = %s",
$meta_key
)
);
if ( ! empty( $result ) ) {
$count = (int) $result[0]->cnt;
}
return $count;
}
/**
* Sets array with imported comments from WordPress database.
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $blog_id
* @return array
*/
public function get_imported_comments( $blog_id ) {
global $wpdb;
$hashtable = array();
$limit = 100;
$offset = 0;
// Grab all comments in chunks.
do {
$results = $wpdb->get_results(
$wpdb->prepare(
"SELECT comment_ID, comment_agent FROM $wpdb->comments LIMIT %d,%d",
$offset,
$limit
)
);
// Increment offset.
$offset = ( $limit + $offset );
if ( ! empty( $results ) ) {
foreach ( $results as $r ) {
// Explode comment_agent key.
list ( $comment_agent_blog_id, $source_comment_id ) = explode( '-', $r->comment_agent );
$source_comment_id = (int) $source_comment_id;
// Check if this comment came from this blog.
if ( (int) $blog_id === (int) $comment_agent_blog_id ) {
$hashtable[ $source_comment_id ] = (int) $r->comment_ID;
}
}
}
} while ( count( $results ) === $limit );
return $hashtable;
}
/**
* @param int $blog_id
* @return int|void
*/
public function set_blog( $blog_id ) {
if ( is_numeric( $blog_id ) ) {
$blog_id = (int) $blog_id;
} else {
$blog = 'http://' . preg_replace( '#^https?://#', '', $blog_id );
$parsed = parse_url( $blog );
if ( ! $parsed || empty( $parsed['host'] ) ) {
fwrite( STDERR, "Error: can not determine blog_id from $blog_id\n" );
exit;
}
if ( empty( $parsed['path'] ) ) {
$parsed['path'] = '/';
}
$blogs = get_sites(
array(
'domain' => $parsed['host'],
'number' => 1,
'path' => $parsed['path'],
)
);
if ( ! $blogs ) {
fwrite( STDERR, "Error: Could not find blog\n" );
exit;
}
$blog = array_shift( $blogs );
$blog_id = (int) $blog->blog_id;
}
if ( function_exists( 'is_multisite' ) ) {
if ( is_multisite() ) {
switch_to_blog( $blog_id );
}
}
return $blog_id;
}
/**
* @param int $user_id
* @return int|void
*/
public function set_user( $user_id ) {
if ( is_numeric( $user_id ) ) {
$user_id = (int) $user_id;
} else {
$user_id = (int) username_exists( $user_id );
}
if ( ! $user_id || ! wp_set_current_user( $user_id ) ) {
fwrite( STDERR, "Error: can not find user\n" );
exit;
}
return $user_id;
}
/**
* Sorts by strlen, longest string first.
*
* @param string $a
* @param string $b
* @return int
*/
public function cmpr_strlen( $a, $b ) {
return strlen( $b ) - strlen( $a );
}
/**
* Gets URL.
*
* @param string $url
* @param string $username
* @param string $password
* @param bool $head
* @return array
*/
public function get_page(
$url,
$username = '',
#[\SensitiveParameter]
$password = '',
$head = false
) {
// Increase the timeout.
add_filter( 'http_request_timeout', array( $this, 'bump_request_timeout' ) );
$headers = array();
$args = array();
if ( true === $head ) {
$args['method'] = 'HEAD';
}
if ( ! empty( $username ) && ! empty( $password ) ) {
$headers['Authorization'] = 'Basic ' . base64_encode( "$username:$password" );
}
$args['headers'] = $headers;
return wp_safe_remote_request( $url, $args );
}
/**
* Bumps up the request timeout for http requests.
*
* @param int $val
* @return int
*/
public function bump_request_timeout( $val ) {
return 60;
}
/**
* Checks if user has exceeded disk quota.
*
* @return bool
*/
public function is_user_over_quota() {
if ( function_exists( 'upload_is_user_over_quota' ) ) {
if ( upload_is_user_over_quota() ) {
return true;
}
}
return false;
}
/**
* Replaces newlines, tabs, and multiple spaces with a single space.
*
* @param string $text
* @return string
*/
public function min_whitespace( $text ) {
return preg_replace( '|[\r\n\t ]+|', ' ', $text );
}
/**
* Resets global variables that grow out of control during imports.
*
* @since 3.0.0
*
* @global wpdb $wpdb WordPress database abstraction object.
* @global int[] $wp_actions
*/
public function stop_the_insanity() {
global $wpdb, $wp_actions;
// Or define( 'WP_IMPORTING', true );
$wpdb->queries = array();
// Reset $wp_actions to keep it from growing out of control.
$wp_actions = array();
}
}
/**
* Returns value of command line params.
* Exits when a required param is not set.
*
* @param string $param
* @param bool $required
* @return mixed
*/
function get_cli_args( $param, $required = false ) {
$args = $_SERVER['argv'];
if ( ! is_array( $args ) ) {
$args = array();
}
$out = array();
$last_arg = null;
$return = null;
$il = count( $args );
for ( $i = 1, $il; $i < $il; $i++ ) {
if ( (bool) preg_match( '/^--(.+)/', $args[ $i ], $match ) ) {
$parts = explode( '=', $match[1] );
$key = preg_replace( '/[^a-z0-9]+/', '', $parts[0] );
if ( isset( $parts[1] ) ) {
$out[ $key ] = $parts[1];
} else {
$out[ $key ] = true;
}
$last_arg = $key;
} elseif ( (bool) preg_match( '/^-([a-zA-Z0-9]+)/', $args[ $i ], $match ) ) {
for ( $j = 0, $jl = strlen( $match[1] ); $j < $jl; $j++ ) {
$key = $match[1][ $j ];
$out[ $key ] = true;
}
$last_arg = $key;
} elseif ( null !== $last_arg ) {
$out[ $last_arg ] = $args[ $i ];
}
}
// Check array for specified param.
if ( isset( $out[ $param ] ) ) {
// Set return value.
$return = $out[ $param ];
}
// Check for missing required param.
if ( ! isset( $out[ $param ] ) && $required ) {
// Display message and exit.
echo "\"$param\" parameter is required but was not specified\n";
exit;
}
return $return;
}