| 1 |
<?php |
| 2 |
defined( 'ABSPATH' ) || exit; |
| 3 |
|
| 4 |
// We need Memcache to continue |
| 5 |
if ( class_exists( 'Memcache' ) ): |
| 6 |
|
| 7 |
/** |
| 8 |
* Upstream: 3.0.2 |
| 9 |
* @author: Ryan Boren, Denis de Bernardy, Matt Martz, Andy Skelton |
| 10 |
* @link https://wordpress.org/plugins/memcached |
| 11 |
*/ |
| 12 |
|
| 13 |
// Users with setups where multiple installs share a common wp-config.php or $table_prefix |
| 14 |
// can use this to guarantee uniqueness for the keys generated by this object cache |
| 15 |
if ( ! defined( 'WP_CACHE_KEY_SALT' ) ) { |
| 16 |
define( 'WP_CACHE_KEY_SALT', DB_NAME ); |
| 17 |
} |
| 18 |
|
| 19 |
function wp_cache_add( $key, $data, $group = '', $expire = 0 ) { |
| 20 |
global $wp_object_cache; |
| 21 |
|
| 22 |
return $wp_object_cache->add( $key, $data, $group, $expire ); |
| 23 |
} |
| 24 |
|
| 25 |
function wp_cache_incr( $key, $n = 1, $group = '' ) { |
| 26 |
global $wp_object_cache; |
| 27 |
|
| 28 |
return $wp_object_cache->incr( $key, $n, $group ); |
| 29 |
} |
| 30 |
|
| 31 |
function wp_cache_decr( $key, $n = 1, $group = '' ) { |
| 32 |
global $wp_object_cache; |
| 33 |
|
| 34 |
return $wp_object_cache->decr( $key, $n, $group ); |
| 35 |
} |
| 36 |
|
| 37 |
function wp_cache_close() { |
| 38 |
global $wp_object_cache; |
| 39 |
|
| 40 |
return $wp_object_cache->close(); |
| 41 |
} |
| 42 |
|
| 43 |
function wp_cache_delete( $key, $group = '' ) { |
| 44 |
global $wp_object_cache; |
| 45 |
|
| 46 |
return $wp_object_cache->delete( $key, $group ); |
| 47 |
} |
| 48 |
|
| 49 |
function wp_cache_flush() { |
| 50 |
global $wp_object_cache; |
| 51 |
|
| 52 |
return $wp_object_cache->flush(); |
| 53 |
} |
| 54 |
|
| 55 |
function wp_cache_get( $key, $group = '', $force = false ) { |
| 56 |
global $wp_object_cache; |
| 57 |
|
| 58 |
return $wp_object_cache->get( $key, $group, $force ); |
| 59 |
} |
| 60 |
|
| 61 |
function wp_cache_init() { |
| 62 |
global $wp_object_cache; |
| 63 |
|
| 64 |
$wp_object_cache = new WP_Object_Cache(); |
| 65 |
} |
| 66 |
|
| 67 |
function wp_cache_replace( $key, $data, $group = '', $expire = 0 ) { |
| 68 |
global $wp_object_cache; |
| 69 |
|
| 70 |
return $wp_object_cache->replace( $key, $data, $group, $expire ); |
| 71 |
} |
| 72 |
|
| 73 |
function wp_cache_set( $key, $data, $group = '', $expire = 0 ) { |
| 74 |
global $wp_object_cache; |
| 75 |
|
| 76 |
if ( defined( 'WP_INSTALLING' ) == false ) { |
| 77 |
return $wp_object_cache->set( $key, $data, $group, $expire ); |
| 78 |
} else { |
| 79 |
return $wp_object_cache->delete( $key, $group ); |
| 80 |
} |
| 81 |
} |
| 82 |
|
| 83 |
function wp_cache_switch_to_blog( $blog_id ) { |
| 84 |
global $wp_object_cache; |
| 85 |
|
| 86 |
return $wp_object_cache->switch_to_blog( $blog_id ); |
| 87 |
} |
| 88 |
|
| 89 |
function wp_cache_add_global_groups( $groups ) { |
| 90 |
global $wp_object_cache; |
| 91 |
|
| 92 |
$wp_object_cache->add_global_groups( $groups ); |
| 93 |
} |
| 94 |
|
| 95 |
function wp_cache_add_non_persistent_groups( $groups ) { |
| 96 |
global $wp_object_cache; |
| 97 |
|
| 98 |
$wp_object_cache->add_non_persistent_groups( $groups ); |
| 99 |
} |
| 100 |
|
| 101 |
class WP_Object_Cache { |
| 102 |
var $global_groups = array( 'WP_Object_Cache_global' ); |
| 103 |
|
| 104 |
var $no_mc_groups = array(); |
| 105 |
|
| 106 |
var $cache = array(); |
| 107 |
var $mc = array(); |
| 108 |
var $stats = array(); |
| 109 |
var $group_ops = array(); |
| 110 |
var $flush_number = array(); |
| 111 |
var $global_flush_number = null; |
| 112 |
|
| 113 |
var $cache_enabled = true; |
| 114 |
var $default_expiration = 0; |
| 115 |
|
| 116 |
function add( $id, $data, $group = 'default', $expire = 0 ) { |
| 117 |
$key = $this->key( $id, $group ); |
| 118 |
|
| 119 |
if ( is_object( $data ) ) { |
| 120 |
$data = clone $data; |
| 121 |
} |
| 122 |
|
| 123 |
if ( in_array( $group, $this->no_mc_groups ) ) { |
| 124 |
$this->cache[ $key ] = $data; |
| 125 |
|
| 126 |
return true; |
| 127 |
} elseif ( isset( $this->cache[ $key ] ) && $this->cache[ $key ] !== false ) { |
| 128 |
return false; |
| 129 |
} |
| 130 |
|
| 131 |
$mc =& $this->get_mc( $group ); |
| 132 |
$expire = ( $expire == 0 ) ? $this->default_expiration : $expire; |
| 133 |
$result = $mc->add( $key, $data, false, $expire ); |
| 134 |
|
| 135 |
if ( false !== $result ) { |
| 136 |
@ ++ $this->stats['add']; |
| 137 |
$this->group_ops[ $group ][] = "add $id"; |
| 138 |
$this->cache[ $key ] = $data; |
| 139 |
} |
| 140 |
|
| 141 |
return $result; |
| 142 |
} |
| 143 |
|
| 144 |
function add_global_groups( $groups ) { |
| 145 |
if ( ! is_array( $groups ) ) { |
| 146 |
$groups = (array) $groups; |
| 147 |
} |
| 148 |
|
| 149 |
$this->global_groups = array_merge( $this->global_groups, $groups ); |
| 150 |
$this->global_groups = array_unique( $this->global_groups ); |
| 151 |
} |
| 152 |
|
| 153 |
function add_non_persistent_groups( $groups ) { |
| 154 |
if ( ! is_array( $groups ) ) { |
| 155 |
$groups = (array) $groups; |
| 156 |
} |
| 157 |
|
| 158 |
$this->no_mc_groups = array_merge( $this->no_mc_groups, $groups ); |
| 159 |
$this->no_mc_groups = array_unique( $this->no_mc_groups ); |
| 160 |
} |
| 161 |
|
| 162 |
function incr( $id, $n = 1, $group = 'default' ) { |
| 163 |
$key = $this->key( $id, $group ); |
| 164 |
$mc =& $this->get_mc( $group ); |
| 165 |
$this->cache[ $key ] = $mc->increment( $key, $n ); |
| 166 |
|
| 167 |
return $this->cache[ $key ]; |
| 168 |
} |
| 169 |
|
| 170 |
function decr( $id, $n = 1, $group = 'default' ) { |
| 171 |
$key = $this->key( $id, $group ); |
| 172 |
$mc =& $this->get_mc( $group ); |
| 173 |
$this->cache[ $key ] = $mc->decrement( $key, $n ); |
| 174 |
|
| 175 |
return $this->cache[ $key ]; |
| 176 |
} |
| 177 |
|
| 178 |
function close() { |
| 179 |
|
| 180 |
foreach ( $this->mc as $bucket => $mc ) { |
| 181 |
$mc->close(); |
| 182 |
} |
| 183 |
} |
| 184 |
|
| 185 |
function delete( $id, $group = 'default' ) { |
| 186 |
$key = $this->key( $id, $group ); |
| 187 |
|
| 188 |
if ( in_array( $group, $this->no_mc_groups ) ) { |
| 189 |
unset( $this->cache[ $key ] ); |
| 190 |
|
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return true; |
| 192 |
} |
| 193 |
|
| 194 |
$mc =& $this->get_mc( $group ); |
| 195 |
|
| 196 |
$result = $mc->delete( $key ); |
| 197 |
|
| 198 |
@ ++ $this->stats['delete']; |
| 199 |
$this->group_ops[ $group ][] = "delete $id"; |
| 200 |
|
| 201 |
if ( false !== $result ) { |
| 202 |
unset( $this->cache[ $key ] ); |
| 203 |
} |
| 204 |
|
| 205 |
return $result; |
| 206 |
} |
| 207 |
|
| 208 |
function flush() { |
| 209 |
// Do not use the memcached flush method. It acts on an |
| 210 |
// entire memcached server, affecting all sites. |
| 211 |
// Flush is also unusable in some setups, e.g. twemproxy. |
| 212 |
// Instead, rotate the key prefix for the current site. |
| 213 |
// Global keys are rotated when flushing on the main site. |
| 214 |
$this->cache = array(); |
| 215 |
$this->rotate_site_keys(); |
| 216 |
if ( is_main_site() ) { |
| 217 |
$this->rotate_global_keys(); |
| 218 |
} |
| 219 |
} |
| 220 |
|
| 221 |
function rotate_site_keys() { |
| 222 |
$this->add( 'flush_number', intval( microtime( true ) * 1e6 ), 'WP_Object_Cache' ); |
| 223 |
$this->flush_number[ $this->blog_prefix ] = $this->incr( 'flush_number', 1, 'WP_Object_Cache' ); |
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} |
| 225 |
|
| 226 |
function rotate_global_keys() { |
| 227 |
$this->add( 'flush_number', intval( microtime( true ) * 1e6 ), 'WP_Object_Cache_global' ); |
| 228 |
$this->global_flush_number = $this->incr( 'flush_number', 1, 'WP_Object_Cache_global' ); |
| 229 |
} |
| 230 |
|
| 231 |
function get( $id, $group = 'default', $force = false ) { |
| 232 |
$key = $this->key( $id, $group ); |
| 233 |
$mc =& $this->get_mc( $group ); |
| 234 |
|
| 235 |
if ( isset( $this->cache[ $key ] ) && ( ! $force || in_array( $group, $this->no_mc_groups ) ) ) { |
| 236 |
if ( is_object( $this->cache[ $key ] ) ) { |
| 237 |
$value = clone $this->cache[ $key ]; |
| 238 |
} else { |
| 239 |
$value = $this->cache[ $key ]; |
| 240 |
} |
| 241 |
} else if ( in_array( $group, $this->no_mc_groups ) ) { |
| 242 |
$this->cache[ $key ] = $value = false; |
| 243 |
} else { |
| 244 |
$value = $mc->get( $key ); |
| 245 |
if ( null === $value ) { |
| 246 |
$value = false; |
| 247 |
} |
| 248 |
$this->cache[ $key ] = $value; |
| 249 |
} |
| 250 |
|
| 251 |
@ ++ $this->stats['get']; |
| 252 |
$this->group_ops[ $group ][] = "get $id"; |
| 253 |
|
| 254 |
if ( 'checkthedatabaseplease' === $value ) { |
| 255 |
unset( $this->cache[ $key ] ); |
| 256 |
$value = false; |
| 257 |
} |
| 258 |
|
| 259 |
return $value; |
| 260 |
} |
| 261 |
|
| 262 |
function get_multi( $groups ) { |
| 263 |
/* |
| 264 |
format: $get['group-name'] = array( 'key1', 'key2' ); |
| 265 |
*/ |
| 266 |
$return = array(); |
| 267 |
foreach ( $groups as $group => $ids ) { |
| 268 |
$mc =& $this->get_mc( $group ); |
| 269 |
foreach ( $ids as $id ) { |
| 270 |
$key = $this->key( $id, $group ); |
| 271 |
if ( isset( $this->cache[ $key ] ) ) { |
| 272 |
if ( is_object( $this->cache[ $key ] ) ) { |
| 273 |
$return[ $key ] = clone $this->cache[ $key ]; |
| 274 |
} else { |
| 275 |
$return[ $key ] = $this->cache[ $key ]; |
| 276 |
} |
| 277 |
continue; |
| 278 |
} else if ( in_array( $group, $this->no_mc_groups ) ) { |
| 279 |
$return[ $key ] = false; |
| 280 |
continue; |
| 281 |
} else { |
| 282 |
$return[ $key ] = $mc->get( $key ); |
| 283 |
} |
| 284 |
} |
| 285 |
if ( $to_get ) { |
| 286 |
$vals = $mc->get_multi( $to_get ); |
| 287 |
$return = array_merge( $return, $vals ); |
| 288 |
} |
| 289 |
} |
| 290 |
@ ++ $this->stats['get_multi']; |
| 291 |
$this->group_ops[ $group ][] = "get_multi $id"; |
| 292 |
$this->cache = array_merge( $this->cache, $return ); |
| 293 |
|
| 294 |
return $return; |
| 295 |
} |
| 296 |
|
| 297 |
function flush_prefix( $group ) { |
| 298 |
if ( $group === 'WP_Object_Cache' || $group === 'WP_Object_Cache_global' ) { |
| 299 |
// Never flush the flush numbers. |
| 300 |
$number = '_'; |
| 301 |
} elseif ( false !== array_search( $group, $this->global_groups ) ) { |
| 302 |
if ( ! isset( $this->global_flush_number ) ) { |
| 303 |
$this->global_flush_number = intval( $this->get( 'flush_number', 'WP_Object_Cache_global' ) ); |
| 304 |
} |
| 305 |
if ( $this->global_flush_number === 0 ) { |
| 306 |
$this->rotate_global_keys(); |
| 307 |
} |
| 308 |
$number = $this->global_flush_number; |
| 309 |
} else { |
| 310 |
if ( ! isset( $this->flush_number[ $this->blog_prefix ] ) ) { |
| 311 |
$this->flush_number[ $this->blog_prefix ] = intval( $this->get( 'flush_number', 'WP_Object_Cache' ) ); |
| 312 |
} |
| 313 |
if ( $this->flush_number[ $this->blog_prefix ] === 0 ) { |
| 314 |
$this->rotate_site_keys(); |
| 315 |
} |
| 316 |
$number = $this->flush_number[ $this->blog_prefix ]; |
| 317 |
} |
| 318 |
|
| 319 |
return $number . ':'; |
| 320 |
} |
| 321 |
|
| 322 |
function key( $key, $group ) { |
| 323 |
if ( empty( $group ) ) { |
| 324 |
$group = 'default'; |
| 325 |
} |
| 326 |
|
| 327 |
$prefix = $this->key_salt; |
| 328 |
|
| 329 |
$prefix .= $this->flush_prefix( $group ); |
| 330 |
|
| 331 |
if ( false !== array_search( $group, $this->global_groups ) ) { |
| 332 |
$prefix .= $this->global_prefix; |
| 333 |
} else { |
| 334 |
$prefix .= $this->blog_prefix; |
| 335 |
} |
| 336 |
|
| 337 |
return preg_replace( '/\s+/', '', "$prefix:$group:$key" ); |
| 338 |
} |
| 339 |
|
| 340 |
function replace( $id, $data, $group = 'default', $expire = 0 ) { |
| 341 |
$key = $this->key( $id, $group ); |
| 342 |
$expire = ( $expire == 0 ) ? $this->default_expiration : $expire; |
| 343 |
$mc =& $this->get_mc( $group ); |
| 344 |
|
| 345 |
if ( is_object( $data ) ) { |
| 346 |
$data = clone $data; |
| 347 |
} |
| 348 |
|
| 349 |
$result = $mc->replace( $key, $data, false, $expire ); |
| 350 |
if ( false !== $result ) { |
| 351 |
$this->cache[ $key ] = $data; |
| 352 |
} |
| 353 |
|
| 354 |
return $result; |
| 355 |
} |
| 356 |
|
| 357 |
function set( $id, $data, $group = 'default', $expire = 0 ) { |
| 358 |
$key = $this->key( $id, $group ); |
| 359 |
if ( isset( $this->cache[ $key ] ) && ( 'checkthedatabaseplease' === $this->cache[ $key ] ) ) { |
| 360 |
return false; |
| 361 |
} |
| 362 |
|
| 363 |
if ( is_object( $data ) ) { |
| 364 |
$data = clone $data; |
| 365 |
} |
| 366 |
|
| 367 |
$this->cache[ $key ] = $data; |
| 368 |
|
| 369 |
if ( in_array( $group, $this->no_mc_groups ) ) { |
| 370 |
return true; |
| 371 |
} |
| 372 |
|
| 373 |
$expire = ( $expire == 0 ) ? $this->default_expiration : $expire; |
| 374 |
$mc =& $this->get_mc( $group ); |
| 375 |
$result = $mc->set( $key, $data, false, $expire ); |
| 376 |
|
| 377 |
return $result; |
| 378 |
} |
| 379 |
|
| 380 |
function switch_to_blog( $blog_id ) { |
| 381 |
global $table_prefix; |
| 382 |
$blog_id = (int) $blog_id; |
| 383 |
$this->blog_prefix = ( is_multisite() ? $blog_id : $table_prefix ); |
| 384 |
} |
| 385 |
|
| 386 |
function colorize_debug_line( $line ) { |
| 387 |
$colors = array( |
| 388 |
'get' => 'green', |
| 389 |
'set' => 'purple', |
| 390 |
'add' => 'blue', |
| 391 |
'delete' => 'red' |
| 392 |
); |
| 393 |
|
| 394 |
$cmd = substr( $line, 0, strpos( $line, ' ' ) ); |
| 395 |
|
| 396 |
$cmd2 = "<span style='color:" . esc_attr( $colors[ $cmd ] ) . "'>" . esc_html( $cmd ) . "</span>"; |
| 397 |
|
| 398 |
return $cmd2 . esc_html( substr( $line, strlen( $cmd ) ) ) . "\n"; |
| 399 |
} |
| 400 |
|
| 401 |
function stats() { |
| 402 |
echo "<p>\n"; |
| 403 |
foreach ( $this->stats as $stat => $n ) { |
| 404 |
echo "<strong>" . esc_html( $stat ) . "</strong> " . esc_html( $n ); |
| 405 |
echo "<br/>\n"; |
| 406 |
} |
| 407 |
echo "</p>\n"; |
| 408 |
echo "<h3>Memcached:</h3>"; |
| 409 |
foreach ( $this->group_ops as $group => $ops ) { |
| 410 |
if ( ! isset( $_GET['debug_queries'] ) && 500 < count( $ops ) ) { |
| 411 |
$ops = array_slice( $ops, 0, 500 ); |
| 412 |
echo "<big>Too many to show! <a href='" . esc_url( add_query_arg( 'debug_queries', 'true' ) ) . "'>Show them anyway</a>.</big>\n"; |
| 413 |
} |
| 414 |
echo "<h4>" . esc_html( $group ) . " commands</h4>"; |
| 415 |
echo "<pre>\n"; |
| 416 |
$lines = array(); |
| 417 |
foreach ( $ops as $op ) { |
| 418 |
$lines[] = $this->colorize_debug_line( $op ); |
| 419 |
} |
| 420 |
print_r( $lines ); |
| 421 |
echo "</pre>\n"; |
| 422 |
} |
| 423 |
} |
| 424 |
|
| 425 |
function &get_mc( $group ) { |
| 426 |
if ( isset( $this->mc[ $group ] ) ) { |
| 427 |
return $this->mc[ $group ]; |
| 428 |
} |
| 429 |
|
| 430 |
return $this->mc['default']; |
| 431 |
} |
| 432 |
|
| 433 |
function failure_callback( $host, $port ) { |
| 434 |
//error_log("Connection failure for $host:$port\n", 3, '/tmp/memcached.txt'); |
| 435 |
} |
| 436 |
|
| 437 |
function salt_keys( $key_salt ) { |
| 438 |
if ( strlen( $key_salt ) ) { |
| 439 |
$this->key_salt = $key_salt . ':'; |
| 440 |
} else { |
| 441 |
$this->key_salt = ''; |
| 442 |
} |
| 443 |
} |
| 444 |
|
| 445 |
function __construct() { |
| 446 |
global $memcached_servers; |
| 447 |
|
| 448 |
if ( isset( $memcached_servers ) ) { |
| 449 |
$buckets = $memcached_servers; |
| 450 |
} else { |
| 451 |
$buckets = array( '127.0.0.1:11211' ); |
| 452 |
} |
| 453 |
|
| 454 |
reset( $buckets ); |
| 455 |
if ( is_int( key( $buckets ) ) ) { |
| 456 |
$buckets = array( 'default' => $buckets ); |
| 457 |
} |
| 458 |
|
| 459 |
foreach ( $buckets as $bucket => $servers ) { |
| 460 |
$this->mc[ $bucket ] = new Memcache(); |
| 461 |
foreach ( $servers as $server ) { |
| 462 |
if ( 'unix://' == substr( $server, 0, 7 ) ) { |
| 463 |
$node = $server; |
| 464 |
$port = 0; |
| 465 |
} else { |
| 466 |
list ( $node, $port ) = explode( ':', $server ); |
| 467 |
if ( ! $port ) { |
| 468 |
$port = ini_get( 'memcache.default_port' ); |
| 469 |
} |
| 470 |
$port = intval( $port ); |
| 471 |
if ( ! $port ) { |
| 472 |
$port = 11211; |
| 473 |
} |
| 474 |
} |
| 475 |
$this->mc[ $bucket ]->addServer( $node, $port, true, 1, 1, 15, true, array( $this, 'failure_callback' ) ); |
| 476 |
$this->mc[ $bucket ]->setCompressThreshold( 20000, 0.2 ); |
| 477 |
} |
| 478 |
} |
| 479 |
|
| 480 |
global $blog_id, $table_prefix; |
| 481 |
$this->global_prefix = ''; |
| 482 |
$this->blog_prefix = ''; |
| 483 |
if ( function_exists( 'is_multisite' ) ) { |
| 484 |
$this->global_prefix = ( is_multisite() || defined( 'CUSTOM_USER_TABLE' ) && defined( 'CUSTOM_USER_META_TABLE' ) ) ? '' : $table_prefix; |
| 485 |
$this->blog_prefix = ( is_multisite() ? $blog_id : $table_prefix ); |
| 486 |
} |
| 487 |
|
| 488 |
$this->salt_keys( WP_CACHE_KEY_SALT ); |
| 489 |
|
| 490 |
$this->cache_hits =& $this->stats['get']; |
| 491 |
$this->cache_misses =& $this->stats['add']; |
| 492 |
} |
| 493 |
} |
| 494 |
|
| 495 |
endif; |
| 496 |
|
