PHP致命错误：允许的内存大小为2097152字节已用尽
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【中文标题】PHP致命错误：允许的内存大小为2097152字节已用尽【英文标题】：PHP Fatal error: Allowed memory size of 2097152 bytes exhausted 【发布时间】：2018-05-19 09:57:24 【问题描述】：在运行 Apache 2.4 和 php 7.0.22 的 Ubuntu 16.04 上运行 WordPress 网站的开发服务器上开始出现此问题。我尝试安装新的 WP 站点并创建一个 phpinfo() 文档，memory_limit 显示为 4096M。当我尝试加载新网站时，我在日志中收到 500 错误：
[Tue Dec 05 11:31:21.361553 2017] [:error] [pid 339] [client 192.168.1.112:60842] PHP Fatal error: Allowed memory size of 2097152 bytes exhausted (tried to allocate 110592 bytes) in /backup/storage/sites/wp.webtent.org/wp-settings.php on line 116
[Tue Dec 05 11:31:21.361597 2017] [:error] [pid 339] [client 192.168.1.112:60842] PHP Stack trace:
[Tue Dec 05 11:31:21.361610 2017] [:error] [pid 339] [client 192.168.1.112:60842] PHP 1. main() /backup/storage/sites/wp.webtent.org/wp-admin/setup-config.php:0
[Tue Dec 05 11:31:21.361621 2017] [:error] [pid 339] [client 192.168.1.112:60842] PHP 2. require() /backup/storage/sites/wp.webtent.org/wp-admin/setup-config.php:33
这是顶部的快照，看起来不像是内存问题...
top - 11:48:45 up 55 min, 2 users, load average: 0.11, 0.10, 0.18
Tasks: 301 total, 1 running, 300 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.0 us, 0.7 sy, 0.0 ni, 99.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 8219672 total, 5059996 free, 802632 used, 2357044 buff/cache
KiB Swap: 4095996 total, 4059280 free, 36716 used. 7306804 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1523 mysql 20 0 551784 159588 15356 S 0.0 1.9 0:01.71 mysqld
3215 robert 20 0 315180 118948 59092 S 0.0 1.4 0:17.95 compiz
1716 root 20 0 170716 82768 43328 S 0.0 1.0 0:13.80 Xorg
3608 robert 20 0 238364 61804 34528 S 0.0 0.8 0:00.25 evolution-alarm
3073 robert 20 0 175796 61280 36024 S 0.0 0.7 0:00.29 hud-service
3503 robert 20 0 227640 55264 48908 S 0.0 0.7 0:01.28 nautilus
3246 robert 20 0 228908 54696 24776 S 0.0 0.7 0:00.13 goa-daemon
3282 robert 20 0 165504 43108 19348 S 0.0 0.5 0:00.17 evolution-calen
3345 robert 20 0 159160 37432 10820 S 0.0 0.5 0:00.12 evolution-calen
3362 robert 20 0 149348 37104 10580 S 0.0 0.5 0:00.12 evolution-calen
3599 robert 20 0 123568 34508 27464 S 0.0 0.4 0:02.82 gnome-terminal-
310 root 20 0 139564 31700 25328 S 0.0 0.4 0:00.05 apache2
3600 robert 20 0 111416 30300 26900 S 0.0 0.4 0:00.17 nm-applet
<snip>
这是 PHP Xdebug 跟踪的样子：
TRACE START [2017-12-05 16:31:21]
0.0022 351672 +351672 -> main() /backup/storage/sites/wp.webtent.org/wp-admin/setup-config.php:0
0.0023 351672 +0 -> define() /backup/storage/sites/wp.webtent.org/wp-admin/setup-config.php:15
0.0023 351704 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-admin/setup-config.php:20
0.0023 351736 +32 -> error_reporting() /backup/storage/sites/wp.webtent.org/wp-admin/setup-config.php:27
0.0023 352064 +328 -> dirname() /backup/storage/sites/wp.webtent.org/wp-admin/setup-config.php:30
0.0023 352144 +80 -> dirname() /backup/storage/sites/wp.webtent.org/wp-admin/setup-config.php:30
0.0024 352120 -24 -> define() /backup/storage/sites/wp.webtent.org/wp-admin/setup-config.php:30
0.0044 352712 +592 -> require(/backup/storage/sites/wp.webtent.org/wp-settings.php) /backup/storage/sites/wp.webtent.org/wp-admin/setup-config.php:33
0.0044 352712 +0 -> define() /backup/storage/sites/wp.webtent.org/wp-settings.php:16
0.0079 352992 +280 -> require(/backup/storage/sites/wp.webtent.org/wp-includes/load.php) /backup/storage/sites/wp.webtent.org/wp-settings.php:19
0.0087 353088 +96 -> require(/backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php) /backup/storage/sites/wp.webtent.org/wp-settings.php:20
0.0099 353184 +96 -> require_once(/backup/storage/sites/wp.webtent.org/wp-includes/plugin.php) /backup/storage/sites/wp.webtent.org/wp-settings.php:21
0.0099 353184 +0 -> dirname() /backup/storage/sites/wp.webtent.org/wp-includes/plugin.php:25
0.0108 354648 +1464 -> require(/backup/storage/sites/wp.webtent.org/wp-includes/class-wp-hook.php) /backup/storage/sites/wp.webtent.org/wp-includes/plugin.php:25
0.0109 354776 +128 -> require(/backup/storage/sites/wp.webtent.org/wp-includes/version.php) /backup/storage/sites/wp.webtent.org/wp-settings.php:29
0.0109 354632 -144 -> wp_initial_constants() /backup/storage/sites/wp.webtent.org/wp-settings.php:41
0.0109 354632 +0 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:26
0.0109 354664 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:27
0.0109 354696 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:28
0.0109 354728 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:29
0.0109 354760 +32 -> ini_get() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:32
0.0109 354784 +24 -> wp_convert_hr_to_bytes() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:33
0.0110 354784 +0 -> trim() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:997
0.0110 354784 +0 -> strtolower() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:997
0.0110 354808 +24 -> strpos() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:1000
0.0110 354808 +0 -> strpos() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:1002
0.0110 354808 +0 -> min() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:1009
0.0110 354784 -24 -> wp_is_ini_value_changeable() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:37
0.0110 355080 +296 -> function_exists() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:1030
0.0111 355080 +0 -> ini_get_all() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:1031
0.0114 486352 +131272 -> is_multisite() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:39
0.0114 486352 +0 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:42
0.0114 486384 +32 -> wp_is_ini_value_changeable() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:47
0.0114 486384 +0 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:50
0.0114 486440 +56 -> wp_convert_hr_to_bytes() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:57
0.0114 486440 +0 -> trim() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:997
0.0114 486440 +0 -> strtolower() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:997
0.0115 486464 +24 -> strpos() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:1000
0.0115 486464 +0 -> strpos() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:1002
0.0115 486464 +0 -> min() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:1009
0.0115 486504 +40 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:66
0.0115 486536 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:70
0.0115 486568 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:75
0.0115 486600 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:79
0.0115 486632 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:82
0.0115 486640 +8 -> strpos() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:88
0.0115 486640 +0 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:93
0.0116 486672 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:100
0.0116 486704 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:103
0.0116 486736 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:106
0.0116 486768 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:121
0.0116 486800 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:122
0.0116 486832 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:123
0.0116 486864 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:124
0.0116 486896 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:125
0.0116 486928 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/default-constants.php:126
0.0116 486936 +8 -> wp_check_php_mysql_versions() /backup/storage/sites/wp.webtent.org/wp-settings.php:44
0.0117 486936 +0 -> phpversion() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:123
0.0117 486976 +40 -> version_compare() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:125
0.0117 486976 +0 -> extension_loaded() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:135
0.0117 486976 +0 -> extension_loaded() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:135
0.0117 486936 -40 -> ini_set() /backup/storage/sites/wp.webtent.org/wp-settings.php:47
0.0117 486936 +0 -> ini_set() /backup/storage/sites/wp.webtent.org/wp-settings.php:48
0.0117 486936 +0 -> date_default_timezone_set() /backup/storage/sites/wp.webtent.org/wp-settings.php:51
0.0117 486944 +8 -> wp_unregister_GLOBALS() /backup/storage/sites/wp.webtent.org/wp-settings.php:54
0.0118 486944 +0 -> ini_get() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:30
0.0118 486944 +0 -> wp_fix_server_vars() /backup/storage/sites/wp.webtent.org/wp-settings.php:57
0.0118 486968 +24 -> array_merge() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:63
0.0118 487912 +944 -> preg_match() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:66
0.0119 487912 +0 -> strpos() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:96
0.0119 487912 +0 -> strpos() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:100
0.0119 487912 +0 -> wp_favicon_request() /backup/storage/sites/wp.webtent.org/wp-settings.php:60
0.0119 487912 +0 -> wp_maintenance() /backup/storage/sites/wp.webtent.org/wp-settings.php:63
0.0119 487992 +80 -> file_exists() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:176
0.0119 487912 -80 -> timer_start() /backup/storage/sites/wp.webtent.org/wp-settings.php:66
0.0119 487936 +24 -> microtime() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:243
0.0119 487936 +0 -> wp_debug_mode() /backup/storage/sites/wp.webtent.org/wp-settings.php:69
0.0120 487936 +0 -> apply_filters() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:316
0.0120 487936 +0 -> error_reporting() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:333
0.0120 487960 +24 -> ini_set() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:337
0.0120 487984 +24 -> wp_set_lang_dir() /backup/storage/sites/wp.webtent.org/wp-settings.php:93
0.0120 488064 +80 -> file_exists() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:356
0.0120 488064 +0 -> is_dir() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:356
0.0120 488064 +0 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:364
0.0120 488096 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:367
0.0130 488616 +520 -> require(/backup/storage/sites/wp.webtent.org/wp-includes/compat.php) /backup/storage/sites/wp.webtent.org/wp-settings.php:96
0.0130 488616 +0 -> function_exists() /backup/storage/sites/wp.webtent.org/wp-includes/compat.php:10
0.0130 488616 +0 -> function_exists() /backup/storage/sites/wp.webtent.org/wp-includes/compat.php:44
0.0131 488616 +0 -> function_exists() /backup/storage/sites/wp.webtent.org/wp-includes/compat.php:134
0.0131 488616 +0 -> function_exists() /backup/storage/sites/wp.webtent.org/wp-includes/compat.php:219
0.0131 488616 +0 -> function_exists() /backup/storage/sites/wp.webtent.org/wp-includes/compat.php:278
0.0131 488616 +0 -> function_exists() /backup/storage/sites/wp.webtent.org/wp-includes/compat.php:291
0.0131 488616 +0 -> function_exists() /backup/storage/sites/wp.webtent.org/wp-includes/compat.php:323
0.0131 488616 +0 -> function_exists() /backup/storage/sites/wp.webtent.org/wp-includes/compat.php:361
0.0131 488616 +0 -> interface_exists() /backup/storage/sites/wp.webtent.org/wp-includes/compat.php:417
0.0131 488616 +0 -> function_exists() /backup/storage/sites/wp.webtent.org/wp-includes/compat.php:434
0.0131 488616 +0 -> function_exists() /backup/storage/sites/wp.webtent.org/wp-includes/compat.php:438
0.0131 488616 +0 -> function_exists() /backup/storage/sites/wp.webtent.org/wp-includes/compat.php:497
0.0136 489640 +1024 -> require(/backup/storage/sites/wp.webtent.org/wp-includes/class-wp-list-util.php) /backup/storage/sites/wp.webtent.org/wp-settings.php:97
0.0240 555256 +65616 -> require(/backup/storage/sites/wp.webtent.org/wp-includes/functions.php) /backup/storage/sites/wp.webtent.org/wp-settings.php:98
0.0275 555504 +248 -> require(/backup/storage/sites/wp.webtent.org/wp-includes/option.php) /backup/storage/sites/wp.webtent.org/wp-includes/functions.php:8
0.0277 555944 +440 -> require(/backup/storage/sites/wp.webtent.org/wp-includes/class-wp-matchesmapregex.php) /backup/storage/sites/wp.webtent.org/wp-settings.php:99
0.0294 557080 +1136 -> require(/backup/storage/sites/wp.webtent.org/wp-includes/class-wp.php) /backup/storage/sites/wp.webtent.org/wp-settings.php:100
0.0297 557880 +800 -> require(/backup/storage/sites/wp.webtent.org/wp-includes/class-wp-error.php) /backup/storage/sites/wp.webtent.org/wp-settings.php:101
0.0306 624208 +66328 -> require(/backup/storage/sites/wp.webtent.org/wp-includes/pomo/mo.php) /backup/storage/sites/wp.webtent.org/wp-settings.php:102
0.0306 624208 +0 -> dirname() /backup/storage/sites/wp.webtent.org/wp-includes/pomo/mo.php:10
0.0314 626112 +1904 -> require_once(/backup/storage/sites/wp.webtent.org/wp-includes/pomo/translations.php) /backup/storage/sites/wp.webtent.org/wp-includes/pomo/mo.php:10
0.0314 626112 +0 -> dirname() /backup/storage/sites/wp.webtent.org/wp-includes/pomo/translations.php:10
0.0321 627992 +1880 -> require_once(/backup/storage/sites/wp.webtent.org/wp-includes/pomo/plural-forms.php) /backup/storage/sites/wp.webtent.org/wp-includes/pomo/translations.php:10
0.0321 627824 -168 -> dirname() /backup/storage/sites/wp.webtent.org/wp-includes/pomo/translations.php:11
0.0324 628904 +1080 -> require_once(/backup/storage/sites/wp.webtent.org/wp-includes/pomo/entry.php) /backup/storage/sites/wp.webtent.org/wp-includes/pomo/translations.php:11
0.0324 628904 +0 -> class_exists() /backup/storage/sites/wp.webtent.org/wp-includes/pomo/entry.php:10
0.0324 628736 -168 -> class_exists() /backup/storage/sites/wp.webtent.org/wp-includes/pomo/translations.php:13
0.0324 629664 +928 -> class_exists() /backup/storage/sites/wp.webtent.org/wp-includes/pomo/translations.php:278
0.0325 629488 -176 -> dirname() /backup/storage/sites/wp.webtent.org/wp-includes/pomo/mo.php:11
0.0331 631600 +2112 -> require_once(/backup/storage/sites/wp.webtent.org/wp-includes/pomo/streams.php) /backup/storage/sites/wp.webtent.org/wp-includes/pomo/mo.php:11
0.0331 631600 +0 -> class_exists() /backup/storage/sites/wp.webtent.org/wp-includes/pomo/streams.php:11
0.0331 631600 +0 -> class_exists() /backup/storage/sites/wp.webtent.org/wp-includes/pomo/streams.php:137
0.0331 632528 +928 -> class_exists() /backup/storage/sites/wp.webtent.org/wp-includes/pomo/streams.php:207
0.0332 633232 +704 -> class_exists() /backup/storage/sites/wp.webtent.org/wp-includes/pomo/streams.php:270
0.0332 634176 +944 -> class_exists() /backup/storage/sites/wp.webtent.org/wp-includes/pomo/streams.php:295
0.0332 634944 +768 -> class_exists() /backup/storage/sites/wp.webtent.org/wp-includes/pomo/mo.php:13
0.0332 635272 +328 -> require_wp_db() /backup/storage/sites/wp.webtent.org/wp-settings.php:106
0.0390 642704 +7432 -> require_once(/backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php) /backup/storage/sites/wp.webtent.org/wp-includes/load.php:396
0.0390 642704 +0 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:15
0.0390 642736 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:20
0.0390 642768 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:21
0.0390 642800 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:26
0.0390 642832 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:31
0.0391 642864 +32 -> define() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:36
0.0391 642808 -56 -> file_exists() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:397
0.0391 643752 +944 -> wpdb->__construct() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:404
0.0391 644024 +272 -> register_shutdown_function() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:568
0.0391 644320 +296 -> function_exists() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:579
0.0392 644320 +0 -> phpversion() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:582
0.0392 644360 +40 -> version_compare() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:582
0.0392 644320 -40 -> wp_set_wpdb_vars() /backup/storage/sites/wp.webtent.org/wp-settings.php:110
0.0392 644648 +328 -> wpdb->__isset() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:421
0.0392 644624 -24 -> wpdb->set_prefix() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:432
0.0392 644624 +0 -> preg_match() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:862
0.0393 644624 +0 -> is_multisite() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:865
0.0393 644624 +0 -> wpdb->tables() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:873
0.0393 644624 +0 -> is_multisite() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:978
0.0393 644624 +0 -> wpdb->get_blog_prefix() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:994
0.0393 644624 +0 -> is_multisite() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:926
0.0393 644624 +0 -> array_merge() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:996
0.0393 645120 +496 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:998
0.0394 645416 +296 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:998
0.0394 644680 -736 -> is_multisite() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:876
0.0394 644680 +0 -> wpdb->get_blog_prefix() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:879
0.0394 644680 +0 -> is_multisite() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:926
0.0394 644680 +0 -> wpdb->tables() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:881
0.0394 644680 +0 -> wpdb->get_blog_prefix() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:994
0.0394 644680 +0 -> is_multisite() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:926
0.0394 644680 +0 -> array_merge() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:996
0.0394 645176 +496 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:998
0.0395 645696 +520 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:998
0.0395 645728 +32 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:998
0.0395 645752 +24 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:998
0.0395 645776 +24 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:998
0.0471 645808 +32 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:998
0.0471 645832 +24 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:998
0.0471 645864 +32 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:998
0.0471 645904 +40 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:998
0.0472 645936 +32 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:998
0.0472 644976 -960 -> wpdb->tables() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:884
0.0472 644976 +0 -> wpdb->get_blog_prefix() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:994
0.0472 644976 +0 -> is_multisite() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:926
0.0472 644976 +0 -> array_merge() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:996
0.0472 645472 +496 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:998
0.0473 645776 +304 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:998
0.0473 645808 +32 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:998
0.0473 645376 -432 -> wpdb->__set() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:885
0.0473 645376 +0 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:642
0.0473 647224 +1848 -> wpdb->__set() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:885
0.0473 647224 +0 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:642
0.0473 647232 +8 -> wpdb->__set() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:885
0.0473 647232 +0 -> in_array() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:642
0.0474 646936 -296 -> is_wp_error() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:434
0.0474 646936 +0 -> wp_start_object_cache() /backup/storage/sites/wp.webtent.org/wp-settings.php:113
0.0474 646936 +0 -> function_exists() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:480
0.0474 647032 +96 -> file_exists() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:481
0.0474 646936 -96 -> wp_using_ext_object_cache() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:504
0.0485 648424 +1488 -> require_once(/backup/storage/sites/wp.webtent.org/wp-includes/cache.php) /backup/storage/sites/wp.webtent.org/wp-includes/load.php:505
0.0485 648256 -168 -> function_exists() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:515
0.0485 648256 +0 -> wp_cache_init() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:516
0.0485 648416 +160 -> WP_Object_Cache->__construct() /backup/storage/sites/wp.webtent.org/wp-includes/cache.php:153
0.0485 648416 +0 -> is_multisite() /backup/storage/sites/wp.webtent.org/wp-includes/cache.php:709
0.0486 648688 +272 -> register_shutdown_function() /backup/storage/sites/wp.webtent.org/wp-includes/cache.php:717
0.0486 648712 +24 -> function_exists() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:519
0.0486 648712 +0 -> wp_cache_add_global_groups() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:520
0.0486 648736 +24 -> WP_Object_Cache->add_global_groups() /backup/storage/sites/wp.webtent.org/wp-includes/cache.php:233
0.0486 648736 +0 -> array_fill_keys() /backup/storage/sites/wp.webtent.org/wp-includes/cache.php:428
0.0486 649232 +496 -> array_merge() /backup/storage/sites/wp.webtent.org/wp-includes/cache.php:429
0.0486 649232 +0 -> wp_cache_add_non_persistent_groups() /backup/storage/sites/wp.webtent.org/wp-includes/load.php:521
0.0498 1023056 +373824 -> wpdb->__destruct() /backup/storage/sites/wp.webtent.org/wp-includes/wp-db.php:0
0.0498 1023056 +0 -> WP_Object_Cache->__destruct() /backup/storage/sites/wp.webtent.org/wp-includes/cache.php:0
0.0500 374368
TRACE END [2017-12-05 16:31:21]
我对 Xdebug 没有任何经验，这告诉我什么？
【问题讨论】：
【参考方案1】：你可以在这里看到http://prntscr.com/agxrtt
所以将 ini_set('Memory_limit','-1') 改为 ini_set('memory_limit',256) 或 ini_set('memory_limit','-1')
【讨论】：
是的，这是我设置 -1 无限制的解决方法。为什么有必要这样做？以上是关于PHP致命错误：允许的内存大小为2097152字节已用尽的主要内容，如果未能解决你的问题，请参考以下文章
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