{"id":30934,"date":"2023-05-19T22:24:11","date_gmt":"2023-06-16T20:26:21","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e6%83%b3%e8%a6%81%e5%9c%a8php%e4%b8%ad%e4%bd%bf%e7%94%a8telnet%ef%bc%81\/"},"modified":"2025-08-12T21:28:44","modified_gmt":"2025-08-12T13:28:44","slug":"%e6%88%91%e6%83%b3%e8%a6%81%e5%9c%a8php%e4%b8%ad%e4%bd%bf%e7%94%a8telnet%ef%bc%81","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e6%83%b3%e8%a6%81%e5%9c%a8php%e4%b8%ad%e4%bd%bf%e7%94%a8telnet%ef%bc%81\/","title":{"rendered":"\u6211\u60f3\u8981\u5728PHP\u4e2d\u4f7f\u7528Telnet\uff01"},"content":{"rendered":"<p>\u8fd9\u7bc7\u6587\u7ae0\u662f2015\u5e74NetOpsCoding\u5723\u8bde\u65e5\u5386\u7684\u7b2c23\u7bc7\u6587\u7ae0\u3002<\/p>\n<p>\u521d\u6b21\u89c1\u9762\u3002\u6211\u5728\u67d0\u901a\u4fe1\u516c\u53f8\u4ece\u4e8b\u7f51\u7edc\u8fd0\u8425\u5de5\u4f5c\u3002\u6211\u5c06\u7ed9\u4f60\u8bb2\u4e00\u4e2a\u5173\u4e8e\u5728\u5723\u8bde\u524d\u591c\u4e0e\u8def\u7531\u5668\u4ea4\u8c08\u7684\u4ee4\u4eba\u4f24\u611f\u7684\u6545\u4e8b\u3002<\/p>\n<h2>\u9996\u5148\u5728\u4e16\u754c\u5404\u5730\uff0cNETCONF\/YANG\u7b49\u6280\u8853\u6b63\u53d7\u5230\u95dc\u6ce8\uff0c\u4f46\u5728\u4e00\u4e9b\u8001\u724c\u901a\u4fe1\u8a2d\u5099\uff0c\u5982Cisco 7206VXR\u3001Catalyst 2950\u7b49\u4ecd\u5728\u73fe\u5834\u7a69\u5b9a\u904b\u884c\uff0c\u4e14\u672a\u4f86\u4e5f\u5c07\u7e7c\u7e8c\u4f7f\u7528Telnet\u9032\u884c\u547d\u4ee4\u884c\u754c\u9762\uff08CLI\uff09\u63a7\u5236\u3002\u4e3b\u6d41\u7684\u7a0b\u5f0f\u8a9e\u8a00\uff0c\u5982Perl\u3001Python\u3001Ruby\uff0c\u90fd\u63d0\u4f9b\u4e86\u5c08\u70baTelnet\u8a2d\u8a08\u7684\u51fd\u5f0f\u5eab\uff0c\u4f46PHP\u537b\u6c92\u6709\u76f8\u61c9\u7684\u652f\u63f4\u3002<\/p>\n<p>\u5728 Packagist \u4e0a\u6709\u4e00\u4e2a Telnet \u5ba2\u6237\u7aef\u5e93\uff0c\u4f46\u7531\u4e8e\u63d0\u793a\u7b26\u7684\u4e0d\u540c\uff0c\u65e0\u6cd5\u767b\u5f55\u5230\u8def\u7531\u5668\u7b49\u8bbe\u5907\uff0c\u56e0\u6b64\u8fd9\u6b21\u6211\u6269\u5c55\u4e86\u5b83\uff0c\u521b\u5efa\u4e86\u4e00\u4e2a\u53ef\u4ee5\u901a\u8fc7 PHP \u4ece Telnet \u767b\u5f55\u5230\u8def\u7531\u5668\u7684\u5e93\uff0c\u73b0\u5728\u6211\u5c06\u4ecb\u7ecd\u7ed9\u5927\u5bb6\u3002<\/p>\n<h2>\u5173\u4e8e Telnet \u5e93<\/p>\n<h3>\u53ef\u4ee5\u4eab\u53d7\u6b64\u4f18\u60e0\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5b9f\u884c\u74b0\u5883\u8981\u4ef6 :<\/ul>\n<\/li>\n<\/ul>\n<p>PHP 5.6\u4ee5\u4e0a\uff08PHP 7.0\u5bfe\u5fdc)<br \/>\nComposer<\/p>\n<p>\u5bfe\u8c61\u30db\u30b9\u30c8 :<\/p>\n<p>Linux\/UNIX\u30b5\u30fc\u30d0\u30fc\u5168\u822c<br \/>\nCisco IOS, IOS-XE, IOS-XR \u30eb\u30fc\u30bf\u30fc\u30fb\u30b9\u30a4\u30c3\u30c1<br \/>\nJuniper JUNOS \u30eb\u30fc\u30bf\u30fc\u30fb\u30b9\u30a4\u30c3\u30c1<br \/>\nAlaxalA, HITACHI \u30eb\u30fc\u30bf\u30fc\u30fb\u30b9\u30a4\u30c3\u30c1<\/p>\n<h3>\u5f00\u53d1\/\u9a8c\u8bc1\u73af\u5883<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">PHP\u5b9f\u884c\u74b0\u5883<\/ul>\n<\/li>\n<\/ul>\n<p>CentOS 7.2<br \/>\nApache 2.4<br \/>\nPHP 7.0<\/p>\n<p>\u30c6\u30b9\u30c8\u6e08\u307f\u63a5\u7d9a\u5148<\/p>\n<p>RHEL 5<br \/>\nRHEL 6<br \/>\nCentOS 7<br \/>\nCisco 7206VXR (IOS 12.3 \/ 12.4)<br \/>\nCisco Catalyst 2950 \/ 2960 \/ 3560 \/ 3750 (IOS 12.2)<br \/>\nCisco 7604 \/ 7609 (IOS 12.2)<br \/>\nCisco ASR 1001 \/ 1002 \/ 1006 (IOS-XE 15.1)<br \/>\nCisco CRS-1 \/ CRS-3 (IOS-XR 4.0)<br \/>\nJuniper T640 \/ T1600 \/ T4000 (JUNOS 12.3)<br \/>\nJuniper E120 \/ E320 (JUNOS 12.3)<br \/>\nJuniper MX240 (JUNOS 12.3)<br \/>\nHITACHI GR4000 (ROUTE-OS 9)<br \/>\nAlaxalA AX7800R (OS-R 10.10)<\/p>\n<h3>\u8bf7\u63d0\u4f9b\u4ee5\u4e0b\u9009\u9879\u7684\u6765\u6e90\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">GitHub : https:\/\/github.com\/miyahan\/Telnet<\/ul>\n<\/li>\n<\/ul>\n<p>Packagist : https:\/\/packagist.org\/packages\/miyahan\/telnet<\/p>\n<h3>\u5b89\u88c5\u6b65\u9aa4\u7531\u4e8e\u4f7f\u7528Composer\uff0c\u56e0\u6b64\u9700\u8981\u63d0\u524d\u5b89\u88c5\u5b83\u3002\u8bf7\u8bbf\u95eehttps:\/\/getcomposer.org\/\u8fdb\u884c\u5b89\u88c5\u3002<\/p>\n<p>\u9996\u5148\u521b\u5efa composer.json \u6587\u4ef6\uff0c\u5e76\u6309\u4ee5\u4e0b\u65b9\u5f0f\u63cf\u8ff0\u5e93\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">{<\/span>\r\n    <span class=\"nl\">\"require\"<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nl\">\"miyahan\/telnet\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"dev-master\"<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u521b\u5efa composer.json \u6587\u4ef6\u540e\uff0c\u6267\u884c composer install \u547d\u4ee4\u4ee5\u5b89\u88c5\u5e93\u6587\u4ef6\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>composer <span class=\"nb\">install\r\n<\/span>Loading composer repositories with package information\r\nInstalling dependencies <span class=\"o\">(<\/span>including require-dev<span class=\"o\">)<\/span>\r\n  - Installing miyahan\/telnet <span class=\"o\">(<\/span>dev-master e1003c2<span class=\"o\">)<\/span>\r\n    Cloning e1003c27e422772962d849187c31f8ace38e8753\r\n\r\nWriting lock file\r\nGenerating autoload files\r\n<\/code><\/pre>\n<p>\u5b89\u88c5\u5e93\u65f6\uff0c\u4f1a\u540c\u65f6\u521b\u5efa\u81ea\u52a8\u52a0\u8f7d\u5668\uff0c\u4ee5\u540e\u9700\u8981\u4f7f\u7528\u65f6\uff0c\u8bf7\u4f7f\u7528require\u8bbf\u95ee\u3002<\/p>\n<h3>\u4f7f\u7528\u65b9\u6cd5\uff1a\u901a\u8fc7Telnet\u8fde\u63a5\u5230Juniper JUNOS\u8def\u7531\u5668\u5e76\u83b7\u53d6\u4fe1\u606f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n<span class=\"k\">require<\/span> <span class=\"s1\">'vendor\/autoload.php'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">try<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nv\">$telnet<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"err\">\\<\/span><span class=\"nf\">miyahan\\network\\Telnet<\/span><span class=\"p\">(<\/span><span class=\"s1\">'10.0.0.1'<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nv\">$telnet<\/span><span class=\"o\">-&gt;<\/span><span class=\"nf\">connect<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"nv\">$telnet<\/span><span class=\"o\">-&gt;<\/span><span class=\"nf\">login<\/span><span class=\"p\">(<\/span><span class=\"s1\">'root'<\/span><span class=\"p\">,<\/span> <span class=\"s1\">'hogehoge'<\/span><span class=\"p\">,<\/span> <span class=\"s1\">'junos'<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nv\">$telnet<\/span><span class=\"o\">-&gt;<\/span><span class=\"nb\">exec<\/span><span class=\"p\">(<\/span><span class=\"s1\">'set cli screen-length 0'<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nv\">$telnet<\/span><span class=\"o\">-&gt;<\/span><span class=\"nf\">setPrompt<\/span><span class=\"p\">(<\/span><span class=\"s1\">'root&gt;'<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"nv\">$result<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">$telnet<\/span><span class=\"o\">-&gt;<\/span><span class=\"nb\">exec<\/span><span class=\"p\">(<\/span><span class=\"s1\">'show system uptime'<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"nv\">$result<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"p\">(<\/span><span class=\"nc\">Exception<\/span> <span class=\"nv\">$e<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"nv\">$e<\/span><span class=\"o\">-&gt;<\/span><span class=\"nf\">getMessage<\/span><span class=\"p\">();<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>$ php telnet-juniper.php\r\nshow system uptime \r\nscc-re0:\r\n--------------------------------------------------------------------------\r\nCurrent time: 2015-12-16 03:26:55 JST\r\nSystem booted: 2011-06-21 14:00:44 JST (234w0d 13:26 ago)\r\nProtocols started: 2011-06-21 15:04:17 JST (234w0d 12:22 ago)\r\nLast configured: 2015-10-06 11:16:17 JST (10w0d 16:10 ago) by root\r\n 3:26AM  up 1638 days, 13:26, 1 user, load averages: 0.04, 0.23, 0.21\r\n\r\nlcc0-re0:\r\n--------------------------------------------------------------------------\r\nCurrent time: 2015-12-16 03:26:55 JST\r\nSystem booted: 2011-06-21 14:01:09 JST (234w0d 13:25 ago)\r\nLast configured: 2015-10-06 11:16:11 JST (10w0d 16:10 ago) by root\r\n 3:26AM  up 1638 days, 13:26, 0 users, load averages: 0.00, 0.02, 0.06\r\n\/\/\/ snip \/\/\/\r\n<\/code><\/pre>\n<p>\u6267\u884c set cli screen-length 0 \u547d\u4ee4\u4ee5\u4e00\u6b21\u8fd4\u56de\u7ed3\u679c\u662f\u5173\u952e\u3002\u7136\u540e\u4f7f\u7528 preg_match \u7b49\u5b57\u7b26\u64cd\u4f5c\u51fd\u6570\u6765\u63d0\u53d6\u6240\u9700\u4fe1\u606f\u3002<\/p>\n<h3>\u4f7f\u7528\u65b9\u6cd5\uff1aTelnet\u5230Cisco IOS\u8def\u7531\u5668\u4ee5\u83b7\u53d6\u4fe1\u606f<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;?php<\/span>\r\n<span class=\"k\">require<\/span> <span class=\"s1\">'vendor\/autoload.php'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">try<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nv\">$telnet<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"err\">\\<\/span><span class=\"nf\">miyahan\\network\\Telnet<\/span><span class=\"p\">(<\/span><span class=\"s1\">'10.0.0.2'<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nv\">$telnet<\/span><span class=\"o\">-&gt;<\/span><span class=\"nf\">connect<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"nv\">$telnet<\/span><span class=\"o\">-&gt;<\/span><span class=\"nf\">login<\/span><span class=\"p\">(<\/span><span class=\"s1\">'root'<\/span><span class=\"p\">,<\/span> <span class=\"s1\">'hogehoge'<\/span><span class=\"p\">,<\/span> <span class=\"s1\">'ios'<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nv\">$telnet<\/span><span class=\"o\">-&gt;<\/span><span class=\"nb\">exec<\/span><span class=\"p\">(<\/span><span class=\"s1\">'terminal length 0'<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nv\">$telnet<\/span><span class=\"o\">-&gt;<\/span><span class=\"nb\">exec<\/span><span class=\"p\">(<\/span><span class=\"s1\">'enable'<\/span><span class=\"mf\">.<\/span><span class=\"s2\">\"<\/span><span class=\"se\">\\r\\n<\/span><span class=\"s2\">\"<\/span><span class=\"mf\">.<\/span><span class=\"s1\">'hogehoge'<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nv\">$telnet<\/span><span class=\"o\">-&gt;<\/span><span class=\"nf\">setPrompt<\/span><span class=\"p\">(<\/span><span class=\"s1\">'router#'<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"nv\">$result<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">$telnet<\/span><span class=\"o\">-&gt;<\/span><span class=\"nb\">exec<\/span><span class=\"p\">(<\/span><span class=\"s1\">'show environment all'<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"nv\">$result<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"p\">(<\/span><span class=\"nc\">Exception<\/span> <span class=\"nv\">$e<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">echo<\/span> <span class=\"nv\">$e<\/span><span class=\"o\">-&gt;<\/span><span class=\"nf\">getMessage<\/span><span class=\"p\">();<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>$ php telnet-cisco.php\r\nshow environment all\r\nPower Supplies:\r\n    Power Supply 1 is Zytek DC Power Supply. Unit is on.\r\n    Power Supply 2 is Zytek DC Power Supply. Unit is on.\r\n\r\nTemperature readings:\r\n    chassis inlet    measured at 28C\/82F \r\n    chassis outlet 1 measured at 29C\/84F \r\n    chassis outlet 2 measured at 31C\/87F \r\n    chassis outlet 3 measured at 32C\/89F \r\n\r\nVoltage readings:\r\n    +3.45 V       measured at +3.50 V \r\n    +5.15 V       measured at +5.27 V \r\n    +12.15 V      measured at +12.34 V \r\n    -11.95 V      measured at -11.95 V \r\n\r\nEnvm stats saved 74822 time(s) since reload\r\n<\/code><\/pre>\n<p>\u5df2\u7ecf\u6210\u529f\u83b7\u5f97\u3002\u5728\u8fd9\u8fb9\uff0c\u4e8b\u5148\u53d1\u51fa\u7ec8\u7aef\u957f\u5ea6\u4e3a0\u7684\u547d\u4ee4\u662f\u5173\u952e\u3002<\/p>\n<h3>\u6545\u969c\u89e3\u6c7a<\/p>\n<h4>\u5f53\u4ece\u7f51\u4e0a\u8bbf\u95ee\u65f6\uff0cTelnet\u8fde\u63a5\u5931\u8d25\u3002\u5f53SELinux\u542f\u7528\u65f6\uff0cTelnet\u8fde\u63a5\u4f1a\u5931\u8d25\u3002<\/p>\n<pre class=\"post-pre\"><code>$ curl http:\/\/localhost\/telnet.php | more\r\nCannot connect to 10.0.0.1 on port 23\r\n\r\n$ sudo tail \/var\/log\/audit\/audit.log\r\ntype=AVC msg=audit(1450217222.842:111): avc:  denied  { name_connect } for  pid=2553 comm=\"httpd\" dest=23 scontext=system_u:system_r:httpd_t:s0 tcontext=system_u:object_r:telnetd_port_t:s0 tclass=tcp_socket\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u8bf7\u7981\u7528SELinux\u6216\u4f7f\u7528\u4e0b\u9762\u7684\u547d\u4ee4\u5141\u8bb8httpd\u5bf9TCP\u5957\u63a5\u5b57\u8fde\u63a5\u3002<\/p>\n<pre class=\"post-pre\"><code>$ sudo setsebool -P httpd_can_network_connect 1\r\n<\/code><\/pre>\n<h4>\u6162\u6162\u7684\u547d\u4ee4\u8d85\u65f6\u4e86\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5982\u679c\u7b49\u5f85\u63d0\u793a\u8d85\u8fc710\u79d2\uff0c\u5c31\u4f1a\u53d1\u751f\u8d85\u65f6\u3002<\/p>\n<pre class=\"post-pre\"><code>$ php telnet.php \r\nCouldn't find the requested : 'router#' within 10 seconds\r\n<\/code><\/pre>\n<p>\u5982\u679c\u8981\u6267\u884c\u9700\u8981\u82b1\u8d39\u8f83\u957f\u65f6\u95f4\u6765\u54cd\u5e94\u7684\u5904\u7406\uff0c\u6bd4\u5982show tech-support \uff0c\u8bf7\u5728\u6784\u9020\u51fd\u6570\u7684\u7b2c\u56db\u4e2a\u53c2\u6570\u4e2d\u6307\u5b9a\u4e00\u4e2a\u8f83\u957f\u7684\u8d85\u65f6\u65f6\u95f4\uff08\u4ee5\u79d2\u4e3a\u5355\u4f4d\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$telnet<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"err\">\\<\/span><span class=\"nf\">miyahan\\network\\Telnet<\/span><span class=\"p\">(<\/span><span class=\"s1\">'10.10.10.10'<\/span><span class=\"p\">,<\/span> <span class=\"mi\">23<\/span><span class=\"p\">,<\/span> <span class=\"mi\">10<\/span><span class=\"p\">,<\/span> <span class=\"mf\">300.0<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<h2>\u6700\u540e\u5c3d\u7ba1\u4ecePHP\u8fdb\u884cTelnet\u7684\u5185\u5bb9\u5e76\u4e0d\u53d7\u6b22\u8fce\uff0c\u4f46\u5728\u6211\u7684\u516c\u53f8\u91cc\uff0c\u6211\u4eec\u5229\u7528\u4f7f\u7528PHP\u7f16\u5199\u7684Web\u5e94\u7528\u7a0b\u5e8f\u6765\u8bbf\u95ee\u8def\u7531\u5668\u548c\u4ea4\u6362\u673a\uff0c\u5e76\u80fd\u591f\u5c06\u547d\u4ee4\u7684\u54cd\u5e94\u7ed3\u679c\u6574\u7406\u5e76\u663e\u793a\u51fa\u6765\uff0c\u8fd9\u79cd\u53ef\u89c6\u5316\u5de5\u5177\u975e\u5e38\u6d3b\u8dc3\u3002\u6211\u5e0c\u671b\u5c06\u6765\u80fd\u591f\u4ecb\u7ecd\u8fd9\u4e2a\u6848\u4f8b\u3002<\/p>\n<p>\u5982\u679c\u53ef\u4ee5\u7684\u8bdd\uff0c\u8bf7\u8bd5\u7528\u4e00\u4e0b\u3002\u4e5f\u671f\u5f85\u60a8\u7684Pull Request\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u7bc7\u6587\u7ae0\u662f2015\u5e74NetOpsCoding\u5723\u8bde\u65e5\u5386\u7684\u7b2c23\u7bc7\u6587\u7ae0\u3002 \u521d\u6b21\u89c1\u9762\u3002\u6211\u5728\u67d0\u901a\u4fe1\u516c\u53f8\u4ece\u4e8b\u7f51\u7edc\u8fd0\u8425\u5de5\u4f5c [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30934","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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