| 1 |
<?php |
| 2 |
defined( 'ABSPATH' ) || exit; |
| 3 |
|
| 4 |
// We need Memcache to continue |
| 5 |
if ( class_exists( 'Memcache' ) ): |
| 6 |
|
| 7 |
/** |
| 8 |
* Upstream: 4.0 |
| 9 |
* |
| 10 |
* @author: Ryan Boren, Denis de Bernardy, Matt Martz, Andy Skelton |
| 11 |
* @link https://wordpress.org/plugins/memcached |
| 12 |
*/ |
| 13 |
|
| 14 |
// Users with setups where multiple installs share a common wp-config.php or $table_prefix |
| 15 |
// can use this to guarantee uniqueness for the keys generated by this object cache |
| 16 |
if ( ! defined( 'WP_CACHE_KEY_SALT' ) ) { |
| 17 |
define( 'WP_CACHE_KEY_SALT', '' ); |
| 18 |
} |
| 19 |
|
| 20 |
function wp_cache_add( $key, $data, $group = '', $expire = 0 ) { |
| 21 |
global $wp_object_cache; |
| 22 |
|
| 23 |
return $wp_object_cache->add( $key, $data, $group, $expire ); |
| 24 |
} |
| 25 |
|
| 26 |
function wp_cache_incr( $key, $n = 1, $group = '' ) { |
| 27 |
global $wp_object_cache; |
| 28 |
|
| 29 |
return $wp_object_cache->incr( $key, $n, $group ); |
| 30 |
} |
| 31 |
|
| 32 |
function wp_cache_decr( $key, $n = 1, $group = '' ) { |
| 33 |
global $wp_object_cache; |
| 34 |
|
| 35 |
return $wp_object_cache->decr( $key, $n, $group ); |
| 36 |
} |
| 37 |
|
| 38 |
function wp_cache_close() { |
| 39 |
global $wp_object_cache; |
| 40 |
|
| 41 |
return $wp_object_cache->close(); |
| 42 |
} |
| 43 |
|
| 44 |
function wp_cache_delete( $key, $group = '' ) { |
| 45 |
global $wp_object_cache; |
| 46 |
|
| 47 |
return $wp_object_cache->delete( $key, $group ); |
| 48 |
} |
| 49 |
|
| 50 |
function wp_cache_flush() { |
| 51 |
global $wp_object_cache; |
| 52 |
|
| 53 |
return $wp_object_cache->flush(); |
| 54 |
} |
| 55 |
|
| 56 |
function wp_cache_get( $key, $group = '', $force = false, &$found = null ) { |
| 57 |
global $wp_object_cache; |
| 58 |
|
| 59 |
$value = apply_filters( 'pre_wp_cache_get', false, $key, $group, $force ); |
| 60 |
if ( false !== $value ) { |
| 61 |
$found = true; |
| 62 |
|
| 63 |
return $value; |
| 64 |
} |
| 65 |
|
| 66 |
return $wp_object_cache->get( $key, $group, $force, $found ); |
| 67 |
} |
| 68 |
|
| 69 |
/** |
| 70 |
* Retrieve multiple cache entries |
| 71 |
* |
| 72 |
* @param array $groups Array of arrays, of groups and keys to retrieve |
| 73 |
* |
| 74 |
* @return mixed |
| 75 |
*/ |
| 76 |
function wp_cache_get_multi( $groups ) { |
| 77 |
global $wp_object_cache; |
| 78 |
|
| 79 |
return $wp_object_cache->get_multi( $groups ); |
| 80 |
} |
| 81 |
|
| 82 |
function wp_cache_init() { |
| 83 |
global $wp_object_cache; |
| 84 |
|
| 85 |
$wp_object_cache = new WP_Object_Cache(); |
| 86 |
} |
| 87 |
|
| 88 |
function wp_cache_replace( $key, $data, $group = '', $expire = 0 ) { |
| 89 |
global $wp_object_cache; |
| 90 |
|
| 91 |
return $wp_object_cache->replace( $key, $data, $group, $expire ); |
| 92 |
} |
| 93 |
|
| 94 |
function wp_cache_set( $key, $data, $group = '', $expire = 0 ) { |
| 95 |
global $wp_object_cache; |
| 96 |
|
| 97 |
if ( defined( 'WP_INSTALLING' ) == false ) { |
| 98 |
return $wp_object_cache->set( $key, $data, $group, $expire ); |
| 99 |
} else { |
| 100 |
return $wp_object_cache->delete( $key, $group ); |
| 101 |
} |
| 102 |
} |
| 103 |
|
| 104 |
function wp_cache_switch_to_blog( $blog_id ) { |
| 105 |
global $wp_object_cache; |
| 106 |
|
| 107 |
return $wp_object_cache->switch_to_blog( $blog_id ); |
| 108 |
} |
| 109 |
|
| 110 |
function wp_cache_add_global_groups( $groups ) { |
| 111 |
global $wp_object_cache; |
| 112 |
|
| 113 |
$wp_object_cache->add_global_groups( $groups ); |
| 114 |
} |
| 115 |
|
| 116 |
function wp_cache_add_non_persistent_groups( $groups ) { |
| 117 |
global $wp_object_cache; |
| 118 |
|
| 119 |
$wp_object_cache->add_non_persistent_groups( $groups ); |
| 120 |
} |
| 121 |
|
| 122 |
class WP_Object_Cache { |
| 123 |
var $global_groups = array( 'WP_Object_Cache_global' ); |
| 124 |
|
| 125 |
var $no_mc_groups = array(); |
| 126 |
|
| 127 |
var $cache = array(); |
| 128 |
var $mc = array(); |
| 129 |
var $default_mcs = array(); |
| 130 |
var $stats = array(); |
| 131 |
var $group_ops = array(); |
| 132 |
|
| 133 |
var $flush_group = 'WP_Object_Cache'; |
| 134 |
var $global_flush_group = 'WP_Object_Cache_global'; |
| 135 |
var $flush_key = "flush_number_v4"; |
| 136 |
var $old_flush_key = "flush_number"; |
| 137 |
var $flush_number = array(); |
| 138 |
var $global_flush_number = null; |
| 139 |
|
| 140 |
var $cache_enabled = true; |
| 141 |
var $default_expiration = 0; |
| 142 |
var $max_expiration = 2592000; // 30 days |
| 143 |
|
| 144 |
var $stats_callback = null; |
| 145 |
|
| 146 |
var $connection_errors = array(); |
| 147 |
|
| 148 |
var $time_total = 0; |
| 149 |
var $size_total = 0; |
| 150 |
var $slow_op_microseconds = 0.005; // 5 ms |
| 151 |
|
| 152 |
function add( $id, $data, $group = 'default', $expire = 0 ) { |
| 153 |
$key = $this->key( $id, $group ); |
| 154 |
|
| 155 |
if ( is_object( $data ) ) { |
| 156 |
$data = clone $data; |
| 157 |
} |
| 158 |
|
| 159 |
if ( in_array( $group, $this->no_mc_groups ) ) { |
| 160 |
$this->cache[ $key ] = [ |
| 161 |
'value' => $data, |
| 162 |
'found' => false, |
| 163 |
]; |
| 164 |
|
| 165 |
return true; |
| 166 |
} elseif ( isset( $this->cache[ $key ]['value'] ) && false !== $this->cache[ $key ]['value'] ) { |
| 167 |
return false; |
| 168 |
} |
| 169 |
|
| 170 |
$mc =& $this->get_mc( $group ); |
| 171 |
|
| 172 |
$expire = intval( $expire ); |
| 173 |
if ( 0 === $expire || $expire > $this->max_expiration ) { |
| 174 |
$expire = $this->default_expiration; |
| 175 |
} |
| 176 |
|
| 177 |
$size = $this->get_data_size( $data ); |
| 178 |
$this->timer_start(); |
| 179 |
$result = $mc->add( $key, $data, false, $expire ); |
| 180 |
$elapsed = $this->timer_stop(); |
| 181 |
|
| 182 |
$comment = ''; |
| 183 |
if ( isset( $this->cache[ $key ] ) ) { |
| 184 |
$comment .= ' [lc already]'; |
| 185 |
} |
| 186 |
if ( false === $result ) { |
| 187 |
$comment .= ' [mc already]'; |
| 188 |
} |
| 189 |
|
| 190 |
$this->group_ops_stats( 'add', $key, $group, $size, $elapsed, $comment ); |
| 191 |
|
| 192 |
if ( false !== $result ) { |
| 193 |
$this->cache[ $key ] = [ |
| 194 |
'value' => $data, |
| 195 |
'found' => true, |
| 196 |
]; |
| 197 |
} else if ( false === $result && true === isset( $this->cache[ $key ]['value'] ) && false === $this->cache[ $key ]['value'] ) { |
| 198 |
/* |
| 199 |
* Here we unset local cache if remote add failed and local cache value is equal to `false` in order |
| 200 |
* to update the local cache anytime we get a new information from remote server. This way, the next |
| 201 |
* cache get will go to remote server and will fetch recent data. |
| 202 |
*/ |
| 203 |
unset( $this->cache[ $key ] ); |
| 204 |
} |
| 205 |
|
| 206 |
return $result; |
| 207 |
} |
| 208 |
|
| 209 |
function add_global_groups( $groups ) { |
| 210 |
if ( ! is_array( $groups ) ) { |
| 211 |
$groups = (array) $groups; |
| 212 |
} |
| 213 |
|
| 214 |
$this->global_groups = array_merge( $this->global_groups, $groups ); |
| 215 |
$this->global_groups = array_unique( $this->global_groups ); |
| 216 |
} |
| 217 |
|
| 218 |
function add_non_persistent_groups( $groups ) { |
| 219 |
if ( ! is_array( $groups ) ) { |
| 220 |
$groups = (array) $groups; |
| 221 |
} |
| 222 |
|
| 223 |
$this->no_mc_groups = array_merge( $this->no_mc_groups, $groups ); |
| 224 |
$this->no_mc_groups = array_unique( $this->no_mc_groups ); |
| 225 |
} |
| 226 |
|
| 227 |
function incr( $id, $n = 1, $group = 'default' ) { |
| 228 |
$key = $this->key( $id, $group ); |
| 229 |
$mc =& $this->get_mc( $group ); |
| 230 |
|
| 231 |
$incremented = $mc->increment( $key, $n ); |
| 232 |
|
| 233 |
$this->cache[ $key ] = [ |
| 234 |
'value' => $incremented, |
| 235 |
'found' => false !== $incremented, |
| 236 |
]; |
| 237 |
|
| 238 |
return $this->cache[ $key ]['value']; |
| 239 |
} |
| 240 |
|
| 241 |
function decr( $id, $n = 1, $group = 'default' ) { |
| 242 |
$key = $this->key( $id, $group ); |
| 243 |
$mc =& $this->get_mc( $group ); |
| 244 |
|
| 245 |
$decremented = $mc->decrement( $key, $n ); |
| 246 |
$this->cache[ $key ] = [ |
| 247 |
'value' => $decremented, |
| 248 |
'found' => false !== $decremented, |
| 249 |
]; |
| 250 |
|
| 251 |
return $this->cache[ $key ]['value']; |
| 252 |
} |
| 253 |
|
| 254 |
function close() { |
| 255 |
foreach ( $this->mc as $bucket => $mc ) { |
| 256 |
$mc->close(); |
| 257 |
} |
| 258 |
} |
| 259 |
|
| 260 |
function delete( $id, $group = 'default' ) { |
| 261 |
$key = $this->key( $id, $group ); |
| 262 |
|
| 263 |
if ( in_array( $group, $this->no_mc_groups ) ) { |
| 264 |
unset( $this->cache[ $key ] ); |
| 265 |
|
| 266 |
return true; |
| 267 |
} |
| 268 |
|
| 269 |
$mc =& $this->get_mc( $group ); |
| 270 |
|
| 271 |
$this->timer_start(); |
| 272 |
$result = $mc->delete( $key ); |
| 273 |
$elapsed = $this->timer_stop(); |
| 274 |
|
| 275 |
$this->group_ops_stats( 'delete', $key, $group, null, $elapsed ); |
| 276 |
|
| 277 |
if ( false !== $result ) { |
| 278 |
unset( $this->cache[ $key ] ); |
| 279 |
} |
| 280 |
|
| 281 |
return $result; |
| 282 |
} |
| 283 |
|
| 284 |
// Gets number from all default servers, replicating if needed |
| 285 |
function get_max_flush_number( $group ) { |
| 286 |
$key = $this->key( $this->flush_key, $group ); |
| 287 |
|
| 288 |
$values = array(); |
| 289 |
$size = 19; // size of microsecond timestamp serialized |
| 290 |
foreach ( $this->default_mcs as $i => $mc ) { |
| 291 |
$flags = false; |
| 292 |
$this->timer_start(); |
| 293 |
$values[ $i ] = $mc->get( $key, $flags ); |
| 294 |
$elapsed = $this->timer_stop(); |
| 295 |
|
| 296 |
if ( empty( $values[ $i ] ) ) { |
| 297 |
$this->group_ops_stats( 'get_flush_number', $key, $group, null, $elapsed, 'not_in_memcache' ); |
| 298 |
} else { |
| 299 |
$this->group_ops_stats( 'get_flush_number', $key, $group, $size, $elapsed, 'memcache' ); |
| 300 |
} |
| 301 |
} |
| 302 |
|
| 303 |
$max = max( $values ); |
| 304 |
|
| 305 |
if ( ! $max > 0 ) { |
| 306 |
return false; |
| 307 |
} |
| 308 |
|
| 309 |
// Replicate to servers not having the max. |
| 310 |
$expire = 0; |
| 311 |
foreach ( $this->default_mcs as $i => $mc ) { |
| 312 |
if ( $values[ $i ] < $max ) { |
| 313 |
$this->timer_start(); |
| 314 |
$mc->set( $key, $max, false, $expire ); |
| 315 |
$elapsed = $this->timer_stop(); |
| 316 |
$this->group_ops_stats( 'set_flush_number', $key, $group, $size, $elapsed, 'replication_repair' ); |
| 317 |
} |
| 318 |
} |
| 319 |
|
| 320 |
return $max; |
| 321 |
} |
| 322 |
|
| 323 |
function set_flush_number( $value, $group ) { |
| 324 |
$key = $this->key( $this->flush_key, $group ); |
| 325 |
$expire = 0; |
| 326 |
$size = 19; |
| 327 |
foreach ( $this->default_mcs as $i => $mc ) { |
| 328 |
$this->timer_start(); |
| 329 |
$mc->set( $key, $value, false, $expire ); |
| 330 |
$elapsed = $this->timer_stop(); |
| 331 |
$this->group_ops_stats( 'set_flush_number', $key, $group, $size, $elapsed, 'replication' ); |
| 332 |
} |
| 333 |
} |
| 334 |
|
| 335 |
function get_flush_number( $group ) { |
| 336 |
$flush_number = $this->get_max_flush_number( $group ); |
| 337 |
// What if there is no v4 flush number? |
| 338 |
if ( empty( $flush_number ) ) { |
| 339 |
// Look for the v3 flush number key. |
| 340 |
$flush_number = intval( $this->get( $this->old_flush_key, $group ) ); |
| 341 |
if ( ! empty( $flush_number ) ) { |
| 342 |
// Found v3 flush number. Upgrade to v4 with replication. |
| 343 |
$this->set_flush_number( $flush_number, $group ); |
| 344 |
// Delete v3 key so we can't later restore it and find stale keys. |
| 345 |
} else { |
| 346 |
// No flush number found anywhere. Make a new one. This flushes the cache. |
| 347 |
$flush_number = $this->new_flush_number(); |
| 348 |
$this->set_flush_number( $flush_number, $group ); |
| 349 |
} |
| 350 |
} |
| 351 |
|
| 352 |
return $flush_number; |
| 353 |
} |
| 354 |
|
| 355 |
function get_global_flush_number() { |
| 356 |
if ( ! isset( $this->global_flush_number ) ) { |
| 357 |
$this->global_flush_number = $this->get_flush_number( $this->global_flush_group ); |
| 358 |
} |
| 359 |
|
| 360 |
return $this->global_flush_number; |
| 361 |
} |
| 362 |
|
| 363 |
function get_blog_flush_number() { |
| 364 |
if ( ! isset( $this->flush_number[ $this->blog_prefix ] ) ) { |
| 365 |
$this->flush_number[ $this->blog_prefix ] = $this->get_flush_number( $this->flush_group ); |
| 366 |
} |
| 367 |
|
| 368 |
return $this->flush_number[ $this->blog_prefix ]; |
| 369 |
} |
| 370 |
|
| 371 |
function flush() { |
| 372 |
// Do not use the memcached flush method. It acts on an |
| 373 |
// entire memcached server, affecting all sites. |
| 374 |
// Flush is also unusable in some setups, e.g. twemproxy. |
| 375 |
// Instead, rotate the key prefix for the current site. |
| 376 |
// Global keys are rotated when flushing on any network's |
| 377 |
// main site. |
| 378 |
$this->cache = array(); |
| 379 |
|
| 380 |
$flush_number = $this->new_flush_number(); |
| 381 |
|
| 382 |
$this->rotate_site_keys( $flush_number ); |
| 383 |
|
| 384 |
if ( is_main_site() ) { |
| 385 |
$this->rotate_global_keys( $flush_number ); |
| 386 |
} |
| 387 |
} |
| 388 |
|
| 389 |
function rotate_site_keys( $flush_number = null ) { |
| 390 |
if ( is_null( $flush_number ) ) { |
| 391 |
$flush_number = $this->new_flush_number(); |
| 392 |
} |
| 393 |
|
| 394 |
$this->set_flush_number( $flush_number, $this->flush_group ); |
| 395 |
|
| 396 |
$this->flush_number[ $this->blog_prefix ] = $flush_number; |
| 397 |
} |
| 398 |
|
| 399 |
function rotate_global_keys( $flush_number = null ) { |
| 400 |
if ( is_null( $flush_number ) ) { |
| 401 |
$flush_number = $this->new_flush_number(); |
| 402 |
} |
| 403 |
|
| 404 |
$this->set_flush_number( $flush_number, $this->global_flush_group ); |
| 405 |
|
| 406 |
$this->global_flush_number = $flush_number; |
| 407 |
} |
| 408 |
|
| 409 |
function new_flush_number() { |
| 410 |
return intval( microtime( true ) * 1e6 ); |
| 411 |
} |
| 412 |
|
| 413 |
function get( $id, $group = 'default', $force = false, &$found = null ) { |
| 414 |
$key = $this->key( $id, $group ); |
| 415 |
$mc =& $this->get_mc( $group ); |
| 416 |
$found = true; |
| 417 |
|
| 418 |
if ( isset( $this->cache[ $key ] ) && ( ! $force || in_array( $group, $this->no_mc_groups ) ) ) { |
| 419 |
if ( isset( $this->cache[ $key ]['value'] ) && is_object( $this->cache[ $key ]['value'] ) ) { |
| 420 |
$value = clone $this->cache[ $key ]['value']; |
| 421 |
} else { |
| 422 |
$value = $this->cache[ $key ]['value']; |
| 423 |
} |
| 424 |
$found = $this->cache[ $key ]['found']; |
| 425 |
|
| 426 |
$this->group_ops_stats( 'get_local', $key, $group, null, null, 'local' ); |
| 427 |
} else if ( in_array( $group, $this->no_mc_groups ) ) { |
| 428 |
$this->cache[ $key ] = [ |
| 429 |
'value' => $value = false, |
| 430 |
'found' => false, |
| 431 |
]; |
| 432 |
|
| 433 |
$found = false; |
| 434 |
|
| 435 |
$this->group_ops_stats( 'get_local', $key, $group, null, null, 'not_in_local' ); |
| 436 |
} else { |
| 437 |
$flags = false; |
| 438 |
$this->timer_start(); |
| 439 |
$value = $mc->get( $key, $flags ); |
| 440 |
$elapsed = $this->timer_stop(); |
| 441 |
|
| 442 |
// Value will be unchanged if the key doesn't exist. |
| 443 |
if ( false === $flags ) { |
| 444 |
$found = false; |
| 445 |
$value = false; |
| 446 |
} |
| 447 |
|
| 448 |
$this->cache[ $key ] = [ |
| 449 |
'value' => $value, |
| 450 |
'found' => $found, |
| 451 |
]; |
| 452 |
|
| 453 |
if ( is_null( $value ) || $value === false ) { |
| 454 |
$this->group_ops_stats( 'get', $key, $group, null, $elapsed, 'not_in_memcache' ); |
| 455 |
} else if ( 'checkthedatabaseplease' === $value ) { |
| 456 |
$this->group_ops_stats( 'get', $key, $group, null, $elapsed, 'checkthedatabaseplease' ); |
| 457 |
} else { |
| 458 |
$size = $this->get_data_size( $value ); |
| 459 |
$this->group_ops_stats( 'get', $key, $group, $size, $elapsed, 'memcache' ); |
| 460 |
} |
| 461 |
} |
| 462 |
|
| 463 |
if ( 'checkthedatabaseplease' === $value ) { |
| 464 |
unset( $this->cache[ $key ] ); |
| 465 |
|
| 466 |
$found = false; |
| 467 |
$value = false; |
| 468 |
} |
| 469 |
|
| 470 |
return $value; |
| 471 |
} |
| 472 |
|
| 473 |
function get_multi( $groups ) { |
| 474 |
/* |
| 475 |
format: $get['group-name'] = array( 'key1', 'key2' ); |
| 476 |
*/ |
| 477 |
$return = array(); |
| 478 |
$return_cache = array( |
| 479 |
'value' => false, |
| 480 |
'found' => false, |
| 481 |
); |
| 482 |
|
| 483 |
foreach ( $groups as $group => $ids ) { |
| 484 |
$mc =& $this->get_mc( $group ); |
| 485 |
$keys = array(); |
| 486 |
$this->timer_start(); |
| 487 |
|
| 488 |
foreach ( $ids as $id ) { |
| 489 |
$key = $this->key( $id, $group ); |
| 490 |
$keys[] = $key; |
| 491 |
|
| 492 |
if ( isset( $this->cache[ $key ] ) ) { |
| 493 |
if ( is_object( $this->cache[ $key ]['value'] ) ) { |
| 494 |
$return[ $key ] = clone $this->cache[ $key ]['value']; |
| 495 |
$return_cache[ $key ] = [ |
| 496 |
'value' => clone $this->cache[ $key ]['value'], |
| 497 |
'found' => $this->cache[ $key ]['found'], |
| 498 |
]; |
| 499 |
} else { |
| 500 |
$return[ $key ] = $this->cache[ $key ]['value']; |
| 501 |
$return_cache[ $key ] = [ |
| 502 |
'value' => $this->cache[ $key ]['value'], |
| 503 |
'found' => $this->cache[ $key ]['found'], |
| 504 |
]; |
| 505 |
} |
| 506 |
|
| 507 |
continue; |
| 508 |
} else if ( in_array( $group, $this->no_mc_groups ) ) { |
| 509 |
$return[ $key ] = false; |
| 510 |
$return_cache[ $key ] = [ |
| 511 |
'value' => false, |
| 512 |
'found' => false, |
| 513 |
]; |
| 514 |
|
| 515 |
continue; |
| 516 |
} else { |
| 517 |
$fresh_get = $mc->get( $key ); |
| 518 |
$return[ $key ] = $fresh_get; |
| 519 |
$return_cache[ $key ] = [ |
| 520 |
'value' => $fresh_get, |
| 521 |
'found' => false !== $fresh_get, |
| 522 |
]; |
| 523 |
} |
| 524 |
} |
| 525 |
|
| 526 |
$elapsed = $this->timer_stop(); |
| 527 |
$this->group_ops_stats( 'get_multi', $keys, $group, null, $elapsed ); |
| 528 |
} |
| 529 |
|
| 530 |
$this->cache = array_merge( $this->cache, $return_cache ); |
| 531 |
|
| 532 |
return $return; |
| 533 |
} |
| 534 |
|
| 535 |
function flush_prefix( $group ) { |
| 536 |
if ( $group === $this->flush_group || $group === $this->global_flush_group ) { |
| 537 |
// Never flush the flush numbers. |
| 538 |
$number = '_'; |
| 539 |
} elseif ( false !== array_search( $group, $this->global_groups ) ) { |
| 540 |
$number = $this->get_global_flush_number(); |
| 541 |
} else { |
| 542 |
$number = $this->get_blog_flush_number(); |
| 543 |
} |
| 544 |
|
| 545 |
return $number . ':'; |
| 546 |
} |
| 547 |
|
| 548 |
function key( $key, $group ) { |
| 549 |
if ( empty( $group ) ) { |
| 550 |
$group = 'default'; |
| 551 |
} |
| 552 |
|
| 553 |
$prefix = $this->key_salt; |
| 554 |
|
| 555 |
$prefix .= $this->flush_prefix( $group ); |
| 556 |
|
| 557 |
if ( false !== array_search( $group, $this->global_groups ) ) { |
| 558 |
$prefix .= $this->global_prefix; |
| 559 |
} else { |
| 560 |
$prefix .= $this->blog_prefix; |
| 561 |
} |
| 562 |
|
| 563 |
return preg_replace( '/\s+/', '', "$prefix:$group:$key" ); |
| 564 |
} |
| 565 |
|
| 566 |
function replace( $id, $data, $group = 'default', $expire = 0 ) { |
| 567 |
$key = $this->key( $id, $group ); |
| 568 |
$expire = intval( $expire ); |
| 569 |
if ( 0 === $expire || $expire > $this->max_expiration ) { |
| 570 |
$expire = $this->default_expiration; |
| 571 |
} |
| 572 |
$mc =& $this->get_mc( $group ); |
| 573 |
|
| 574 |
if ( is_object( $data ) ) { |
| 575 |
$data = clone $data; |
| 576 |
} |
| 577 |
|
| 578 |
$size = $this->get_data_size( $data ); |
| 579 |
$this->timer_start(); |
| 580 |
$result = $mc->replace( $key, $data, false, $expire ); |
| 581 |
$elapsed = $this->timer_stop(); |
| 582 |
$this->group_ops_stats( 'replace', $key, $group, $size, $elapsed ); |
| 583 |
|
| 584 |
if ( false !== $result ) { |
| 585 |
$this->cache[ $key ] = [ |
| 586 |
'value' => $data, |
| 587 |
'found' => true, |
| 588 |
]; |
| 589 |
} |
| 590 |
|
| 591 |
return $result; |
| 592 |
} |
| 593 |
|
| 594 |
function set( $id, $data, $group = 'default', $expire = 0 ) { |
| 595 |
$key = $this->key( $id, $group ); |
| 596 |
|
| 597 |
if ( isset( $this->cache[ $key ] ) && ( 'checkthedatabaseplease' === $this->cache[ $key ]['value'] ) ) { |
| 598 |
return false; |
| 599 |
} |
| 600 |
|
| 601 |
if ( is_object( $data ) ) { |
| 602 |
$data = clone $data; |
| 603 |
} |
| 604 |
|
| 605 |
$this->cache[ $key ] = [ |
| 606 |
'value' => $data, |
| 607 |
'found' => false, // Set to false as not technically found in memcache at this point. |
| 608 |
]; |
| 609 |
|
| 610 |
if ( in_array( $group, $this->no_mc_groups ) ) { |
| 611 |
$this->group_ops_stats( 'set_local', $key, $group, null, null ); |
| 612 |
|
| 613 |
return true; |
| 614 |
} |
| 615 |
|
| 616 |
$expire = intval( $expire ); |
| 617 |
if ( 0 === $expire || $expire > $this->max_expiration ) { |
| 618 |
$expire = $this->default_expiration; |
| 619 |
} |
| 620 |
|
| 621 |
$mc =& $this->get_mc( $group ); |
| 622 |
|
| 623 |
$size = $this->get_data_size( $data ); |
| 624 |
$this->timer_start(); |
| 625 |
$result = $mc->set( $key, $data, false, $expire ); |
| 626 |
$elapsed = $this->timer_stop(); |
| 627 |
$this->group_ops_stats( 'set', $key, $group, $size, $elapsed ); |
| 628 |
|
| 629 |
// Update the found cache value with the result of the set in memcache. |
| 630 |
$this->cache[ $key ]['found'] = $result; |
| 631 |
|
| 632 |
return $result; |
| 633 |
} |
| 634 |
|
| 635 |
function switch_to_blog( $blog_id ) { |
| 636 |
global $table_prefix; |
| 637 |
|
| 638 |
$blog_id = (int) $blog_id; |
| 639 |
|
| 640 |
$this->blog_prefix = ( is_multisite() ? $blog_id : $table_prefix ); |
| 641 |
} |
| 642 |
|
| 643 |
function colorize_debug_line( $line, $trailing_html = '' ) { |
| 644 |
$colors = array( |
| 645 |
'get' => 'green', |
| 646 |
'get_local' => 'lightgreen', |
| 647 |
'get_multi' => 'fuchsia', |
| 648 |
'set' => 'purple', |
| 649 |
'set_local' => 'orchid', |
| 650 |
'add' => 'blue', |
| 651 |
'delete' => 'red', |
| 652 |
'delete_local' => 'tomato', |
| 653 |
'slow-ops' => 'crimson', |
| 654 |
); |
| 655 |
|
| 656 |
$cmd = substr( $line, 0, strpos( $line, ' ' ) ); |
| 657 |
|
| 658 |
// Start off with a neutral default color... |
| 659 |
$color_for_cmd = 'brown'; |
| 660 |
// And if the cmd has a specific color, use that instead |
| 661 |
if ( isset( $colors[ $cmd ] ) ) { |
| 662 |
$color_for_cmd = $colors[ $cmd ]; |
| 663 |
} |
| 664 |
|
| 665 |
$cmd2 = "<span style='color:" . esc_attr( $color_for_cmd ) . "; font-weight: bold;'>" . esc_html( $cmd ) . "</span>"; |
| 666 |
|
| 667 |
return $cmd2 . esc_html( substr( $line, strlen( $cmd ) ) ) . "$trailing_html\n"; |
| 668 |
} |
| 669 |
|
| 670 |
function js_toggle() { |
| 671 |
echo " |
| 672 |
<script> |
| 673 |
function memcachedToggleVisibility( id, hidePrefix ) { |
| 674 |
var element = document.getElementById( id ); |
| 675 |
if ( ! element ) { |
| 676 |
return; |
| 677 |
} |
| 678 |
|
| 679 |
// Hide all element with `hidePrefix` if given. Used to display only one element at a time. |
| 680 |
if ( hidePrefix ) { |
| 681 |
var groupStats = document.querySelectorAll( '[id^=\"' + hidePrefix + '\"]' ); |
| 682 |
groupStats.forEach( |
| 683 |
function ( element ) { |
| 684 |
element.style.display = 'none'; |
| 685 |
} |
| 686 |
); |
| 687 |
} |
| 688 |
|
| 689 |
// Toggle the one we clicked. |
| 690 |
if ( 'none' === element.style.display ) { |
| 691 |
element.style.display = 'block'; |
| 692 |
} else { |
| 693 |
element.style.display = 'none'; |
| 694 |
} |
| 695 |
} |
| 696 |
</script> |
| 697 |
"; |
| 698 |
} |
| 699 |
|
| 700 |
function stats() { |
| 701 |
$this->js_toggle(); |
| 702 |
|
| 703 |
echo '<h2><span>Total memcache query time:</span>' . number_format_i18n( sprintf( '%0.1f', $this->time_total * 1000 ), 1 ) . ' ms</h2>'; |
| 704 |
echo "\n"; |
| 705 |
echo '<h2><span>Total memcache size:</span>' . esc_html( size_format( $this->size_total, 2 ) ) . '</h2>'; |
| 706 |
echo "\n"; |
| 707 |
|
| 708 |
foreach ( $this->stats as $stat => $n ) { |
| 709 |
if ( empty( $n ) ) { |
| 710 |
continue; |
| 711 |
} |
| 712 |
|
| 713 |
echo '<h2>'; |
| 714 |
echo $this->colorize_debug_line( "$stat $n" ); |
| 715 |
echo '</h2>'; |
| 716 |
} |
| 717 |
|
| 718 |
echo "<ul class='debug-menu-links' style='clear:left;font-size:14px;'>\n"; |
| 719 |
$groups = array_keys( $this->group_ops ); |
| 720 |
usort( $groups, 'strnatcasecmp' ); |
| 721 |
|
| 722 |
$active_group = $groups[0]; |
| 723 |
// Always show `slow-ops` first |
| 724 |
if ( in_array( 'slow-ops', $groups ) ) { |
| 725 |
$slow_ops_key = array_search( 'slow-ops', $groups ); |
| 726 |
$slow_ops = $groups[ $slow_ops_key ]; |
| 727 |
unset( $groups[ $slow_ops_key ] ); |
| 728 |
array_unshift( $groups, $slow_ops ); |
| 729 |
$active_group = 'slow-ops'; |
| 730 |
} |
| 731 |
|
| 732 |
$total_ops = 0; |
| 733 |
$group_titles = array(); |
| 734 |
foreach ( $groups as $group ) { |
| 735 |
$group_name = $group; |
| 736 |
if ( empty( $group_name ) ) { |
| 737 |
$group_name = 'default'; |
| 738 |
} |
| 739 |
$group_ops = count( $this->group_ops[ $group ] ); |
| 740 |
$group_size = size_format( array_sum( array_map( function ( $op ) { |
| 741 |
return $op[2]; |
| 742 |
}, $this->group_ops[ $group ] ) ), 2 ); |
| 743 |
$group_time = number_format_i18n( sprintf( '%0.1f', array_sum( array_map( function ( $op ) { |
| 744 |
return $op[3]; |
| 745 |
}, $this->group_ops[ $group ] ) ) * 1000 ), 1 ); |
| 746 |
$total_ops += $group_ops; |
| 747 |
$group_title = "{$group_name} [$group_ops][$group_size][{$group_time} ms]"; |
| 748 |
$group_titles[ $group ] = $group_title; |
| 749 |
echo "\t<li><a href='#' onclick='memcachedToggleVisibility( \"object-cache-stats-menu-target-" . esc_js( $group_name ) . "\", \"object-cache-stats-menu-target-\" );'>" . esc_html( $group_title ) . "</a></li>\n"; |
| 750 |
} |
| 751 |
echo "</ul>\n"; |
| 752 |
|
| 753 |
echo "<div id='object-cache-stats-menu-targets'>\n"; |
| 754 |
foreach ( $groups as $group ) { |
| 755 |
$group_name = $group; |
| 756 |
if ( empty( $group_name ) ) { |
| 757 |
$group_name = 'default'; |
| 758 |
} |
| 759 |
$current = $active_group == $group ? 'style="display: block"' : 'style="display: none"'; |
| 760 |
echo "<div id='object-cache-stats-menu-target-" . esc_attr( $group_name ) . "' class='object-cache-stats-menu-target' $current>\n"; |
| 761 |
echo '<h3>' . esc_html( $group_titles[ $group ] ) . '</h3>' . "\n"; |
| 762 |
echo "<pre>\n"; |
| 763 |
foreach ( $this->group_ops[ $group ] as $index => $arr ) { |
| 764 |
printf( '%3d ', $index ); |
| 765 |
echo $this->get_group_ops_line( $index, $arr ); |
| 766 |
} |
| 767 |
echo "</pre>\n"; |
| 768 |
echo "</div>"; |
| 769 |
} |
| 770 |
|
| 771 |
echo "</div>"; |
| 772 |
} |
| 773 |
|
| 774 |
function get_group_ops_line( $index, $arr ) { |
| 775 |
// operation |
| 776 |
$line = "{$arr[0]} "; |
| 777 |
|
| 778 |
// key |
| 779 |
$json_encoded_key = json_encode( $arr[1] ); |
| 780 |
$line .= $json_encoded_key . " "; |
| 781 |
|
| 782 |
// comment |
| 783 |
if ( ! empty( $arr[4] ) ) { |
| 784 |
$line .= "{$arr[4]} "; |
| 785 |
} |
| 786 |
|
| 787 |
// size |
| 788 |
if ( isset( $arr[2] ) ) { |
| 789 |
$line .= '(' . size_format( $arr[2], 2 ) . ') '; |
| 790 |
} |
| 791 |
|
| 792 |
// time |
| 793 |
if ( isset( $arr[3] ) ) { |
| 794 |
$line .= '(' . number_format_i18n( sprintf( '%0.1f', $arr[3] * 1000 ), 1 ) . ' ms)'; |
| 795 |
} |
| 796 |
|
| 797 |
// backtrace |
| 798 |
$bt_link = ''; |
| 799 |
if ( isset( $arr[6] ) ) { |
| 800 |
$key_hash = md5( $index . $json_encoded_key ); |
| 801 |
$bt_link = " <small><a href='#' onclick='memcachedToggleVisibility( \"object-cache-stats-debug-$key_hash\" );'>Toggle Backtrace</a></small>"; |
| 802 |
$bt_link .= "<pre id='object-cache-stats-debug-$key_hash' style='display:none'>" . esc_html( $arr[6] ) . "</pre>"; |
| 803 |
} |
| 804 |
|
| 805 |
return $this->colorize_debug_line( $line, $bt_link ); |
| 806 |
} |
| 807 |
|
| 808 |
function &get_mc( $group ) { |
| 809 |
if ( isset( $this->mc[ $group ] ) ) { |
| 810 |
return $this->mc[ $group ]; |
| 811 |
} |
| 812 |
|
| 813 |
return $this->mc['default']; |
| 814 |
} |
| 815 |
|
| 816 |
function failure_callback( $host, $port ) { |
| 817 |
$this->connection_errors[] = array( |
| 818 |
'host' => $host, |
| 819 |
'port' => $port, |
| 820 |
); |
| 821 |
} |
| 822 |
|
| 823 |
function salt_keys( $key_salt ) { |
| 824 |
if ( strlen( $key_salt ) ) { |
| 825 |
$this->key_salt = $key_salt . ':'; |
| 826 |
} else { |
| 827 |
$this->key_salt = ''; |
| 828 |
} |
| 829 |
} |
| 830 |
|
| 831 |
function __construct() { |
| 832 |
$this->stats = array( |
| 833 |
'get' => 0, |
| 834 |
'get_local' => 0, |
| 835 |
'get_multi' => 0, |
| 836 |
'set' => 0, |
| 837 |
'set_local' => 0, |
| 838 |
'add' => 0, |
| 839 |
'delete' => 0, |
| 840 |
'delete_local' => 0, |
| 841 |
'slow-ops' => 0, |
| 842 |
); |
| 843 |
|
| 844 |
global $memcached_servers; |
| 845 |
|
| 846 |
if ( isset( $memcached_servers ) ) { |
| 847 |
$buckets = $memcached_servers; |
| 848 |
} else { |
| 849 |
$buckets = array( '127.0.0.1:11211' ); |
| 850 |
} |
| 851 |
|
| 852 |
reset( $buckets ); |
| 853 |
|
| 854 |
if ( is_int( key( $buckets ) ) ) { |
| 855 |
$buckets = array( 'default' => $buckets ); |
| 856 |
} |
| 857 |
|
| 858 |
foreach ( $buckets as $bucket => $servers ) { |
| 859 |
$this->mc[ $bucket ] = new Memcache(); |
| 860 |
|
| 861 |
foreach ( $servers as $i => $server ) { |
| 862 |
if ( 'unix://' == substr( $server, 0, 7 ) ) { |
| 863 |
$node = $server; |
| 864 |
$port = 0; |
| 865 |
} else { |
| 866 |
list ( $node, $port ) = explode( ':', $server ); |
| 867 |
|
| 868 |
if ( ! $port ) { |
| 869 |
$port = ini_get( 'memcache.default_port' ); |
| 870 |
} |
| 871 |
|
| 872 |
$port = intval( $port ); |
| 873 |
|
| 874 |
if ( ! $port ) { |
| 875 |
$port = 11211; |
| 876 |
} |
| 877 |
} |
| 878 |
|
| 879 |
$this->mc[ $bucket ]->addServer( $node, $port, true, 1, 1, 15, true, array( $this, 'failure_callback' ) ); |
| 880 |
$this->mc[ $bucket ]->setCompressThreshold( 20000, 0.2 ); |
| 881 |
|
| 882 |
// Prepare individual connections to servers in default bucket for flush_number redundancy |
| 883 |
if ( 'default' === $bucket ) { |
| 884 |
$this->default_mcs[ $i ] = new Memcache(); |
| 885 |
$this->default_mcs[ $i ]->addServer( $node, $port, true, 1, 1, 15, true, array( $this, 'failure_callback' ) ); |
| 886 |
} |
| 887 |
} |
| 888 |
} |
| 889 |
|
| 890 |
global $blog_id, $table_prefix; |
| 891 |
|
| 892 |
$this->global_prefix = ''; |
| 893 |
$this->blog_prefix = ''; |
| 894 |
|
| 895 |
if ( function_exists( 'is_multisite' ) ) { |
| 896 |
$this->global_prefix = ( is_multisite() || defined( 'CUSTOM_USER_TABLE' ) && defined( 'CUSTOM_USER_META_TABLE' ) ) ? '' : $table_prefix; |
| 897 |
$this->blog_prefix = ( is_multisite() ? $blog_id : $table_prefix ); |
| 898 |
} |
| 899 |
|
| 900 |
$this->salt_keys( WP_CACHE_KEY_SALT ); |
| 901 |
|
| 902 |
$this->cache_hits =& $this->stats['get']; |
| 903 |
$this->cache_misses =& $this->stats['add']; |
| 904 |
} |
| 905 |
|
| 906 |
function increment_stat( $field, $num = 1 ) { |
| 907 |
if ( ! isset( $this->stats[ $field ] ) ) { |
| 908 |
$this->stats[ $field ] = $num; |
| 909 |
} else { |
| 910 |
$this->stats[ $field ] += $num; |
| 911 |
} |
| 912 |
} |
| 913 |
|
| 914 |
function group_ops_stats( $op, $keys, $group, $size, $time, $comment = '' ) { |
| 915 |
$this->increment_stat( $op ); |
| 916 |
|
| 917 |
// we have no use of the local ops details for now |
| 918 |
if ( strpos( $op, '_local' ) ) { |
| 919 |
return; |
| 920 |
} |
| 921 |
|
| 922 |
$this->size_total += $size; |
| 923 |
|
| 924 |
$keys = $this->strip_memcached_keys( $keys ); |
| 925 |
|
| 926 |
if ( $time > $this->slow_op_microseconds && 'get_multi' !== $op ) { |
| 927 |
$this->increment_stat( 'slow-ops' ); |
| 928 |
$backtrace = null; |
| 929 |
if ( function_exists( 'wp_debug_backtrace_summary' ) ) { |
| 930 |
$backtrace = wp_debug_backtrace_summary(); |
| 931 |
} |
| 932 |
$this->group_ops['slow-ops'][] = array( $op, $keys, $size, $time, $comment, $group, $backtrace ); |
| 933 |
} |
| 934 |
|
| 935 |
$this->group_ops[ $group ][] = array( $op, $keys, $size, $time, $comment ); |
| 936 |
} |
| 937 |
|
| 938 |
/** |
| 939 |
* Key format: key_salt:flush_number:table_prefix:key_name |
| 940 |
* |
| 941 |
* We want to strip the `key_salt:flush_number` part to not leak the memcached keys. |
| 942 |
* If `key_salt` is set we strip `'key_salt:flush_number`, otherwise just strip the `flush_number` part. |
| 943 |
*/ |
| 944 |
function strip_memcached_keys( $keys ) { |
| 945 |
if ( ! is_array( $keys ) ) { |
| 946 |
$keys = [ $keys ]; |
| 947 |
} |
| 948 |
|
| 949 |
foreach ( $keys as $key => $value ) { |
| 950 |
$offset = 0; |
| 951 |
if ( ! empty( $this->key_salt ) ) { |
| 952 |
$offset = strpos( $value, ':' ) + 1; |
| 953 |
} |
| 954 |
|
| 955 |
$start = strpos( $value, ':', $offset ); |
| 956 |
$keys[ $key ] = substr( $value, $start + 1 ); |
| 957 |
} |
| 958 |
|
| 959 |
if ( 1 === count( $keys ) ) { |
| 960 |
return $keys[0]; |
| 961 |
} |
| 962 |
|
| 963 |
return $keys; |
| 964 |
} |
| 965 |
|
| 966 |
function timer_start() { |
| 967 |
$this->time_start = microtime( true ); |
| 968 |
|
| 969 |
return true; |
| 970 |
} |
| 971 |
|
| 972 |
function timer_stop() { |
| 973 |
$time_total = microtime( true ) - $this->time_start; |
| 974 |
$this->time_total += $time_total; |
| 975 |
|
| 976 |
return $time_total; |
| 977 |
} |
| 978 |
|
| 979 |
function get_data_size( $data ) { |
| 980 |
if ( is_string( $data ) ) { |
| 981 |
return strlen( $data ); |
| 982 |
} |
| 983 |
|
| 984 |
$serialized = serialize( $data ); |
| 985 |
|
| 986 |
return strlen( $serialized ); |
| 987 |
} |
| 988 |
} |
| 989 |
|
| 990 |
endif; |
| 991 |
|
