| 1 |
<?php |
| 2 |
/** |
| 3 |
* Memcached Redux drop-in, Mika's fork |
| 4 |
* |
| 5 |
* @link https://github.com/skopco/memcached-redux |
| 6 |
* Upstream: 0.1.7 |
| 7 |
*/ |
| 8 |
|
| 9 |
if ( ! defined( 'WP_CACHE_KEY_SALT' ) ) { |
| 10 |
define( 'WP_CACHE_KEY_SALT', DB_NAME ); |
| 11 |
} |
| 12 |
|
| 13 |
if ( class_exists( 'Memcached' ) ): |
| 14 |
|
| 15 |
function wp_cache_add( $key, $data, $group = '', $expire = 0 ) { |
| 16 |
global $wp_object_cache; |
| 17 |
|
| 18 |
return $wp_object_cache->add( $key, $data, $group, $expire ); |
| 19 |
} |
| 20 |
|
| 21 |
function wp_cache_incr( $key, $n = 1, $group = '' ) { |
| 22 |
global $wp_object_cache; |
| 23 |
|
| 24 |
return $wp_object_cache->incr( $key, $n, $group ); |
| 25 |
} |
| 26 |
|
| 27 |
function wp_cache_decr( $key, $n = 1, $group = '' ) { |
| 28 |
global $wp_object_cache; |
| 29 |
|
| 30 |
return $wp_object_cache->decr( $key, $n, $group ); |
| 31 |
} |
| 32 |
|
| 33 |
function wp_cache_close() { |
| 34 |
global $wp_object_cache; |
| 35 |
|
| 36 |
return $wp_object_cache->close(); |
| 37 |
} |
| 38 |
|
| 39 |
function wp_cache_delete( $key, $group = '' ) { |
| 40 |
global $wp_object_cache; |
| 41 |
|
| 42 |
return $wp_object_cache->delete( $key, $group ); |
| 43 |
} |
| 44 |
|
| 45 |
function wp_cache_flush() { |
| 46 |
global $wp_object_cache; |
| 47 |
|
| 48 |
return $wp_object_cache->flush(); |
| 49 |
} |
| 50 |
|
| 51 |
function wp_cache_get( $key, $group = '', $force = false, &$found = null ) { |
| 52 |
global $wp_object_cache; |
| 53 |
|
| 54 |
return $wp_object_cache->get( $key, $group, $force, $found ); |
| 55 |
} |
| 56 |
|
| 57 |
/** |
| 58 |
* $keys_and_groups = array( |
| 59 |
* array( 'key', 'group' ), |
| 60 |
* array( 'key', '' ), |
| 61 |
* array( 'key', 'group' ), |
| 62 |
* array( 'key' ) |
| 63 |
* ); |
| 64 |
*/ |
| 65 |
function wp_cache_get_multi( $key_and_groups, $bucket = 'default' ) { |
| 66 |
global $wp_object_cache; |
| 67 |
|
| 68 |
return $wp_object_cache->get_multi( $key_and_groups, $bucket ); |
| 69 |
} |
| 70 |
|
| 71 |
/** |
| 72 |
* $items = array( |
| 73 |
* array( 'key', 'data', 'group' ), |
| 74 |
* array( 'key', 'data' ) |
| 75 |
* ); |
| 76 |
*/ |
| 77 |
function wp_cache_set_multi( $items, $expire = 0, $group = 'default' ) { |
| 78 |
global $wp_object_cache; |
| 79 |
|
| 80 |
return $wp_object_cache->set_multi( $items, $expire = 0, $group = 'default' ); |
| 81 |
} |
| 82 |
|
| 83 |
function wp_cache_init() { |
| 84 |
global $wp_object_cache; |
| 85 |
|
| 86 |
$wp_object_cache = new WP_Object_Cache(); |
| 87 |
} |
| 88 |
|
| 89 |
function wp_cache_replace( $key, $data, $group = '', $expire = 0 ) { |
| 90 |
global $wp_object_cache; |
| 91 |
|
| 92 |
return $wp_object_cache->replace( $key, $data, $group, $expire ); |
| 93 |
} |
| 94 |
|
| 95 |
function wp_cache_set( $key, $data, $group = '', $expire = 0 ) { |
| 96 |
global $wp_object_cache; |
| 97 |
|
| 98 |
if ( defined( 'WP_INSTALLING' ) == false ) { |
| 99 |
return $wp_object_cache->set( $key, $data, $group, $expire ); |
| 100 |
} else { |
| 101 |
return $wp_object_cache->delete( $key, $group ); |
| 102 |
} |
| 103 |
} |
| 104 |
|
| 105 |
function wp_cache_add_global_groups( $groups ) { |
| 106 |
global $wp_object_cache; |
| 107 |
|
| 108 |
$wp_object_cache->add_global_groups( $groups ); |
| 109 |
} |
| 110 |
|
| 111 |
function wp_cache_add_non_persistent_groups( $groups ) { |
| 112 |
global $wp_object_cache; |
| 113 |
|
| 114 |
$wp_object_cache->add_non_persistent_groups( $groups ); |
| 115 |
} |
| 116 |
|
| 117 |
class WP_Object_Cache { |
| 118 |
var $global_groups = array(); |
| 119 |
|
| 120 |
var $no_mc_groups = array(); |
| 121 |
|
| 122 |
var $cache = array(); |
| 123 |
var $mc = array(); |
| 124 |
var $stats = array(); |
| 125 |
var $group_ops = array(); |
| 126 |
|
| 127 |
var $cache_enabled = true; |
| 128 |
var $default_expiration = 0; |
| 129 |
|
| 130 |
function add( $id, $data, $group = 'default', $expire = 0 ) { |
| 131 |
$key = $this->key( $id, $group ); |
| 132 |
|
| 133 |
if ( is_object( $data ) ) { |
| 134 |
$data = clone $data; |
| 135 |
} |
| 136 |
|
| 137 |
if ( in_array( $group, $this->no_mc_groups ) ) { |
| 138 |
$this->cache[ $key ] = $data; |
| 139 |
|
| 140 |
return true; |
| 141 |
} elseif ( isset( $this->cache[ $key ] ) && $this->cache[ $key ] !== false ) { |
| 142 |
return false; |
| 143 |
} |
| 144 |
|
| 145 |
$mc =& $this->get_mc( $group ); |
| 146 |
$expire = ( $expire == 0 ) ? $this->default_expiration : $expire; |
| 147 |
$result = $mc->add( $key, $data, $expire ); |
| 148 |
|
| 149 |
if ( false !== $result ) { |
| 150 |
++ $this->stats['add']; |
| 151 |
$this->group_ops[ $group ][] = "add $id"; |
| 152 |
$this->cache[ $key ] = $data; |
| 153 |
} |
| 154 |
|
| 155 |
return $result; |
| 156 |
} |
| 157 |
|
| 158 |
function add_global_groups( $groups ) { |
| 159 |
if ( ! is_array( $groups ) ) { |
| 160 |
$groups = (array) $groups; |
| 161 |
} |
| 162 |
|
| 163 |
$this->global_groups = array_merge( $this->global_groups, $groups ); |
| 164 |
$this->global_groups = array_unique( $this->global_groups ); |
| 165 |
} |
| 166 |
|
| 167 |
function add_non_persistent_groups( $groups ) { |
| 168 |
if ( ! is_array( $groups ) ) { |
| 169 |
$groups = (array) $groups; |
| 170 |
} |
| 171 |
|
| 172 |
$this->no_mc_groups = array_merge( $this->no_mc_groups, $groups ); |
| 173 |
$this->no_mc_groups = array_unique( $this->no_mc_groups ); |
| 174 |
} |
| 175 |
|
| 176 |
function incr( $id, $n = 1, $group = 'default' ) { |
| 177 |
$key = $this->key( $id, $group ); |
| 178 |
$mc =& $this->get_mc( $group ); |
| 179 |
$this->cache[ $key ] = $mc->increment( $key, $n ); |
| 180 |
|
| 181 |
return $this->cache[ $key ]; |
| 182 |
} |
| 183 |
|
| 184 |
function decr( $id, $n = 1, $group = 'default' ) { |
| 185 |
$key = $this->key( $id, $group ); |
| 186 |
$mc =& $this->get_mc( $group ); |
| 187 |
$this->cache[ $key ] = $mc->decrement( $key, $n ); |
| 188 |
|
| 189 |
return $this->cache[ $key ]; |
| 190 |
} |
| 191 |
|
| 192 |
function close() { |
| 193 |
// Silence is Golden. |
| 194 |
} |
| 195 |
|
| 196 |
function delete( $id, $group = 'default' ) { |
| 197 |
$key = $this->key( $id, $group ); |
| 198 |
|
| 199 |
if ( in_array( $group, $this->no_mc_groups ) ) { |
| 200 |
unset( $this->cache[ $key ] ); |
| 201 |
|
| 202 |
return true; |
| 203 |
} |
| 204 |
|
| 205 |
$mc =& $this->get_mc( $group ); |
| 206 |
|
| 207 |
$result = $mc->delete( $key ); |
| 208 |
|
| 209 |
if ( false !== $result ) { |
| 210 |
++ $this->stats['delete']; |
| 211 |
$this->group_ops[ $group ][] = "delete $id"; |
| 212 |
unset( $this->cache[ $key ] ); |
| 213 |
} |
| 214 |
|
| 215 |
return $result; |
| 216 |
} |
| 217 |
|
| 218 |
function flush() { |
| 219 |
// Don't flush if multi-blog. |
| 220 |
if ( function_exists( 'is_site_admin' ) || defined( 'CUSTOM_USER_TABLE' ) && defined( 'CUSTOM_USER_META_TABLE' ) ) { |
| 221 |
return true; |
| 222 |
} |
| 223 |
|
| 224 |
$ret = true; |
| 225 |
foreach ( array_keys( $this->mc ) as $group ) { |
| 226 |
$ret &= $this->mc[ $group ]->flush(); |
| 227 |
} |
| 228 |
|
| 229 |
return $ret; |
| 230 |
} |
| 231 |
|
| 232 |
function get( $id, $group = 'default', $force = false, &$found = null ) { |
| 233 |
$key = $this->key( $id, $group ); |
| 234 |
$mc =& $this->get_mc( $group ); |
| 235 |
$found = false; |
| 236 |
|
| 237 |
if ( isset( $this->cache[ $key ] ) && ( ! $force || in_array( $group, $this->no_mc_groups ) ) ) { |
| 238 |
$found = true; |
| 239 |
if ( is_object( $this->cache[ $key ] ) ) { |
| 240 |
$value = clone $this->cache[ $key ]; |
| 241 |
} else { |
| 242 |
$value = $this->cache[ $key ]; |
| 243 |
} |
| 244 |
} else if ( in_array( $group, $this->no_mc_groups ) ) { |
| 245 |
$this->cache[ $key ] = $value = false; |
| 246 |
} else { |
| 247 |
$value = $mc->get( $key ); |
| 248 |
if ( empty( $value ) || ( is_integer( $value ) && - 1 == $value ) ) { |
| 249 |
$value = false; |
| 250 |
$found = $mc->getResultCode() !== Memcached::RES_NOTFOUND; |
| 251 |
} else { |
| 252 |
$found = true; |
| 253 |
} |
| 254 |
$this->cache[ $key ] = $value; |
| 255 |
} |
| 256 |
|
| 257 |
if ( $found ) { |
| 258 |
++ $this->stats['get']; |
| 259 |
$this->group_ops[ $group ][] = "get $id"; |
| 260 |
} else { |
| 261 |
++ $this->stats['miss']; |
| 262 |
} |
| 263 |
|
| 264 |
if ( 'checkthedatabaseplease' === $value ) { |
| 265 |
unset( $this->cache[ $key ] ); |
| 266 |
$value = false; |
| 267 |
} |
| 268 |
|
| 269 |
return $value; |
| 270 |
} |
| 271 |
|
| 272 |
function get_multi( $keys, $group = 'default' ) { |
| 273 |
$return = array(); |
| 274 |
$gets = array(); |
| 275 |
foreach ( $keys as $i => $values ) { |
| 276 |
$mc =& $this->get_mc( $group ); |
| 277 |
$values = (array) $values; |
| 278 |
if ( empty( $values[1] ) ) { |
| 279 |
$values[1] = 'default'; |
| 280 |
} |
| 281 |
|
| 282 |
list( $id, $group ) = (array) $values; |
| 283 |
$key = $this->key( $id, $group ); |
| 284 |
|
| 285 |
if ( isset( $this->cache[ $key ] ) ) { |
| 286 |
|
| 287 |
if ( is_object( $this->cache[ $key ] ) ) { |
| 288 |
$return[ $key ] = clone $this->cache[ $key ]; |
| 289 |
} else { |
| 290 |
$return[ $key ] = $this->cache[ $key ]; |
| 291 |
} |
| 292 |
|
| 293 |
} else if ( in_array( $group, $this->no_mc_groups ) ) { |
| 294 |
$return[ $key ] = false; |
| 295 |
|
| 296 |
} else { |
| 297 |
$gets[ $key ] = $key; |
| 298 |
} |
| 299 |
} |
| 300 |
|
| 301 |
if ( ! empty( $gets ) ) { |
| 302 |
$results = $mc->getMulti( $gets, $null, Memcached::GET_PRESERVE_ORDER ); |
| 303 |
$joined = array_combine( array_keys( $gets ), array_values( $results ) ); |
| 304 |
$return = array_merge( $return, $joined ); |
| 305 |
} |
| 306 |
|
| 307 |
++ $this->stats['get_multi']; |
| 308 |
$this->group_ops[ $group ][] = "get_multi $id"; |
| 309 |
$this->cache = array_merge( $this->cache, $return ); |
| 310 |
|
| 311 |
return array_values( $return ); |
| 312 |
} |
| 313 |
|
| 314 |
function key( $key, $group ) { |
| 315 |
if ( empty( $group ) ) { |
| 316 |
$group = 'default'; |
| 317 |
} |
| 318 |
|
| 319 |
if ( false !== array_search( $group, $this->global_groups ) ) { |
| 320 |
$prefix = $this->global_prefix; |
| 321 |
} else { |
| 322 |
$prefix = $this->blog_prefix; |
| 323 |
} |
| 324 |
|
| 325 |
return preg_replace( '/\s+/', '', WP_CACHE_KEY_SALT . "$prefix$group:$key" ); |
| 326 |
} |
| 327 |
|
| 328 |
function replace( $id, $data, $group = 'default', $expire = 0 ) { |
| 329 |
$key = $this->key( $id, $group ); |
| 330 |
$expire = ( $expire == 0 ) ? $this->default_expiration : $expire; |
| 331 |
$mc =& $this->get_mc( $group ); |
| 332 |
|
| 333 |
if ( is_object( $data ) ) { |
| 334 |
$data = clone $data; |
| 335 |
} |
| 336 |
|
| 337 |
$result = $mc->replace( $key, $data, $expire ); |
| 338 |
if ( false !== $result ) { |
| 339 |
$this->cache[ $key ] = $data; |
| 340 |
} |
| 341 |
|
| 342 |
return $result; |
| 343 |
} |
| 344 |
|
| 345 |
function set( $id, $data, $group = 'default', $expire = 0 ) { |
| 346 |
$key = $this->key( $id, $group ); |
| 347 |
if ( isset( $this->cache[ $key ] ) && ( 'checkthedatabaseplease' === $this->cache[ $key ] ) ) { |
| 348 |
return false; |
| 349 |
} |
| 350 |
|
| 351 |
if ( is_object( $data ) ) { |
| 352 |
$data = clone $data; |
| 353 |
} |
| 354 |
|
| 355 |
$this->cache[ $key ] = $data; |
| 356 |
|
| 357 |
if ( in_array( $group, $this->no_mc_groups ) ) { |
| 358 |
return true; |
| 359 |
} |
| 360 |
|
| 361 |
$expire = ( $expire == 0 ) ? $this->default_expiration : $expire; |
| 362 |
$mc =& $this->get_mc( $group ); |
| 363 |
$result = $mc->set( $key, $data, $expire ); |
| 364 |
|
| 365 |
return $result; |
| 366 |
} |
| 367 |
|
| 368 |
function set_multi( $items, $expire = 0, $group = 'default' ) { |
| 369 |
$sets = array(); |
| 370 |
$mc =& $this->get_mc( $group ); |
| 371 |
$expire = ( $expire == 0 ) ? $this->default_expiration : $expire; |
| 372 |
|
| 373 |
foreach ( $items as $i => $item ) { |
| 374 |
if ( empty( $item[2] ) ) { |
| 375 |
$item[2] = 'default'; |
| 376 |
} |
| 377 |
|
| 378 |
list( $id, $data, $group ) = $item; |
| 379 |
|
| 380 |
$key = $this->key( $id, $group ); |
| 381 |
if ( isset( $this->cache[ $key ] ) && ( 'checkthedatabaseplease' === $this->cache[ $key ] ) ) { |
| 382 |
continue; |
| 383 |
} |
| 384 |
|
| 385 |
if ( is_object( $data ) ) { |
| 386 |
$data = clone $data; |
| 387 |
} |
| 388 |
|
| 389 |
$this->cache[ $key ] = $data; |
| 390 |
|
| 391 |
if ( in_array( $group, $this->no_mc_groups ) ) { |
| 392 |
continue; |
| 393 |
} |
| 394 |
|
| 395 |
$sets[ $key ] = $data; |
| 396 |
} |
| 397 |
|
| 398 |
if ( ! empty( $sets ) ) { |
| 399 |
$mc->setMulti( $sets, $expire ); |
| 400 |
} |
| 401 |
} |
| 402 |
|
| 403 |
function colorize_debug_line( $line ) { |
| 404 |
$colors = array( |
| 405 |
'get' => 'green', |
| 406 |
'set' => 'purple', |
| 407 |
'add' => 'blue', |
| 408 |
'delete' => 'red' |
| 409 |
); |
| 410 |
|
| 411 |
$cmd = substr( $line, 0, strpos( $line, ' ' ) ); |
| 412 |
|
| 413 |
$cmd2 = "<span style='color:" . esc_attr( $colors[ $cmd ] ) . "'>" . esc_html( $cmd ) . "</span>"; |
| 414 |
|
| 415 |
return $cmd2 . esc_html( substr( $line, strlen( $cmd ) ) ) . "\n"; |
| 416 |
} |
| 417 |
|
| 418 |
function stats() { |
| 419 |
echo "<p>\n"; |
| 420 |
foreach ( $this->stats as $stat => $n ) { |
| 421 |
echo "<strong>" . esc_html( $stat ) . "</strong> " . esc_html( $n ); |
| 422 |
echo "<br/>\n"; |
| 423 |
} |
| 424 |
echo "</p>\n"; |
| 425 |
echo "<h3>Memcached:</h3>"; |
| 426 |
foreach ( $this->group_ops as $group => $ops ) { |
| 427 |
if ( ! isset( $_GET['debug_queries'] ) && 500 < count( $ops ) ) { |
| 428 |
$ops = array_slice( $ops, 0, 500 ); |
| 429 |
echo "<big>Too many to show! <a href='" . esc_url( add_query_arg( 'debug_queries', 'true' ) ) . "'>Show them anyway</a>.</big>\n"; |
| 430 |
} |
| 431 |
echo "<h4>" . esc_html( $group ) . " commands</h4>"; |
| 432 |
echo "<pre>\n"; |
| 433 |
$lines = array(); |
| 434 |
foreach ( $ops as $op ) { |
| 435 |
$lines[] = $this->colorize_debug_line( $op ); |
| 436 |
} |
| 437 |
print_r( $lines ); |
| 438 |
echo "</pre>\n"; |
| 439 |
} |
| 440 |
|
| 441 |
if ( ! empty( $this->debug ) && $this->debug ) { |
| 442 |
var_dump( $this->memcache_debug ); |
| 443 |
} |
| 444 |
} |
| 445 |
|
| 446 |
function &get_mc( $group ) { |
| 447 |
if ( isset( $this->mc[ $group ] ) ) { |
| 448 |
return $this->mc[ $group ]; |
| 449 |
} |
| 450 |
|
| 451 |
return $this->mc['default']; |
| 452 |
} |
| 453 |
|
| 454 |
function __construct() { |
| 455 |
|
| 456 |
$this->stats = array( |
| 457 |
'get' => 0, |
| 458 |
'get_multi' => 0, |
| 459 |
'add' => 0, |
| 460 |
'set' => 0, |
| 461 |
'delete' => 0, |
| 462 |
'miss' => 0, |
| 463 |
); |
| 464 |
|
| 465 |
global $memcached_servers; |
| 466 |
|
| 467 |
if ( isset( $memcached_servers ) ) { |
| 468 |
$buckets = $memcached_servers; |
| 469 |
} else { |
| 470 |
$buckets = array( '127.0.0.1:11211' ); |
| 471 |
} |
| 472 |
|
| 473 |
reset( $buckets ); |
| 474 |
if ( is_int( key( $buckets ) ) ) { |
| 475 |
$buckets = array( 'default' => $buckets ); |
| 476 |
} |
| 477 |
|
| 478 |
foreach ( $buckets as $bucket => $servers ) { |
| 479 |
$this->mc[ $bucket ] = new Memcached(); |
| 480 |
|
| 481 |
$instances = array(); |
| 482 |
foreach ( $servers as $server ) { |
| 483 |
@list( $node, $port ) = explode( ':', $server ); |
| 484 |
if ( empty( $port ) ) { |
| 485 |
$port = ini_get( 'memcache.default_port' ); |
| 486 |
} |
| 487 |
$port = intval( $port ); |
| 488 |
if ( ! $port ) { |
| 489 |
$port = 11211; |
| 490 |
} |
| 491 |
|
| 492 |
$instances[] = array( $node, $port, 1 ); |
| 493 |
} |
| 494 |
$this->mc[ $bucket ]->addServers( $instances ); |
| 495 |
} |
| 496 |
|
| 497 |
global $blog_id, $table_prefix; |
| 498 |
$this->global_prefix = ''; |
| 499 |
$this->blog_prefix = ''; |
| 500 |
if ( function_exists( 'is_multisite' ) ) { |
| 501 |
$this->global_prefix = ( is_multisite() || defined( 'CUSTOM_USER_TABLE' ) && defined( 'CUSTOM_USER_META_TABLE' ) ) ? '' : $table_prefix; |
| 502 |
$this->blog_prefix = ( is_multisite() ? $blog_id : $table_prefix ) . ':'; |
| 503 |
} |
| 504 |
|
| 505 |
$this->cache_hits =& $this->stats['get']; |
| 506 |
$this->cache_misses =& $this->stats['miss']; |
| 507 |
} |
| 508 |
} |
| 509 |
else: // No Memcached |
| 510 |
|
| 511 |
// In 3.7+, we can handle this smoothly |
| 512 |
if ( function_exists( 'wp_using_ext_object_cache' ) ) { |
| 513 |
wp_using_ext_object_cache( false ); |
| 514 |
|
| 515 |
// In earlier versions, there isn't a clean bail-out method. |
| 516 |
} else { |
| 517 |
wp_die( 'Memcached class not available.' ); |
| 518 |
} |
| 519 |
|
| 520 |
endif; |
| 521 |
|
