charitable / includes / libraries / wp-session / class-wp-session-utils.php

class-wp-session-utils.php in Charitable – Donation & Fundraising Platform (Donation Forms, Recurring Donations & Fundraising Campaigns) 1.7.0, at includes/libraries/wp-session/class-wp-session-utils.php

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1	<?php
2
3	/**
4	* Utility class for sesion utilities
5	*
6	* THIS CLASS SHOULD NEVER BE INSTANTIATED
7	*/
8	class WP_Session_Utils {
9	/**
10	* Count the total sessions in the database.
11	*
12	* @global wpdb $wpdb
13	*
14	* @return int
15	*/
16	public static function count_sessions() {
17	global $wpdb;
18
19	$query = "SELECT COUNT(*) FROM $wpdb->options WHERE option_name LIKE '_wp_session_expires_%'";
20
21	/**
22	* Filter the query in case tables are non-standard.
23	*
24	* @param string $query Database count query
25	*/
26	$query = apply_filters( 'wp_session_count_query', $query );
27
28	$sessions = $wpdb->get_var( $query );
29
30	return absint( $sessions );
31	}
32
33	/**
34	* Create a new, random session in the database.
35	*
36	* @param null\|string $date
37	*/
38	public static function create_dummy_session( $date = null ) {
39	// Generate our date
40	if ( null !== $date ) {
41	$time = strtotime( $date );
42
43	if ( false === $time ) {
44	$date = null;
45	} else {
46	$expires = date( 'U', strtotime( $date ) );
47	}
48	}
49
50	// If null was passed, or if the string parsing failed, fall back on a default
51	if ( null === $date ) {
52	/**
53	* Filter the expiration of the session in the database
54	*
55	* @param int
56	*/
57	$expires = time() + (int) apply_filters( 'wp_session_expiration', 30 * 60 );
58	}
59
60	$session_id = self::generate_id();
61
62	// Store the session
63	add_option( "_wp_session_{$session_id}", array(), '', 'no' );
64	add_option( "_wp_session_expires_{$session_id}", $expires, '', 'no' );
65	}
66
67	/**
68	* Delete old sessions from the database.
69	*
70	* @param int $limit Maximum number of sessions to delete.
71	*
72	* @global wpdb $wpdb
73	*
74	* @return int Sessions deleted.
75	*/
76	public static function delete_old_sessions( $limit = 1000 ) {
77	global $wpdb;
78
79	$limit = absint( $limit );
80	$keys = $wpdb->get_results( "SELECT option_name, option_value FROM $wpdb->options WHERE option_name LIKE '_wp_session_expires_%' ORDER BY option_value ASC LIMIT 0, {$limit}" );
81
82	$now = time();
83	$expired = array();
84	$count = 0;
85
86	foreach( $keys as $expiration ) {
87	$key = $expiration->option_name;
88	$expires = $expiration->option_value;
89
90	if ( $now > $expires ) {
91	$session_id = preg_replace("/[^A-Za-z0-9_]/", '', substr( $key, 20 ) );
92
93	$expired[] = $key;
94	$expired[] = "_wp_session_{$session_id}";
95
96	$count += 1;
97	}
98	}
99
100	// Delete expired sessions
101	if ( ! empty( $expired ) ) {
102	$placeholders = array_fill( 0, count( $expired ), '%s' );
103	$format = implode( ', ', $placeholders );
104	$query = "DELETE FROM $wpdb->options WHERE option_name IN ($format)";
105
106	$prepared = $wpdb->prepare( $query, $expired );
107	$wpdb->query( $prepared );
108	}
109
110	return $count;
111	}
112
113	/**
114	* Remove all sessions from the database, regardless of expiration.
115	*
116	* @global wpdb $wpdb
117	*
118	* @return int Sessions deleted
119	*/
120	public static function delete_all_sessions() {
121	global $wpdb;
122
123	$count = $wpdb->query( "DELETE FROM $wpdb->options WHERE option_name LIKE '_wp_session_%'" );
124
125	return (int) ( $count / 2 );
126	}
127
128	/**
129	* Generate a new, random session ID.
130	*
131	* @return string
132	*/
133	public static function generate_id() {
134	require_once( ABSPATH . 'wp-includes/class-phpass.php' );
135	$hash = new PasswordHash( 8, false );
136
137	return md5( $hash->get_random_bytes( 32 ) );
138	}
139	}