给同事做了个 PHP 接口，转发发送短信的请求，同时要把发送记录发送到远程的 cacti 的 syslog 去
很简单，但是也不简单
首先是 PHP 服务器，是最简化编译的，php -m 查了一下
1php -m
2[PHP Modules]
3Core
4ctype
5curl
6date
7dom
8fileinfo
9filter
10gettext
11hash
12iconv
13json
14libxml
15openssl
16pcre
17PDO
18pdo_sqlite
19Phar
20posix
21Reflection
22session
23SimpleXML
24SPL
25sqlite3
26standard
27tokenizer
28xml
29xmlreader
30xmlwriter
31
32[Zend Modules]
居然没有 socket 模块，没办法，找到源代码，编译一个安装，原有的 php 安装路径是 /export/servers/php
1$ tar zxvf php-7.4.0.tar.gz
2$ cd php-7.4.0/sockets
3$ /export/servers/php/bin/phpize
4$ ./configure --enable-sockets --with-php-config=/export/servers/php/bin/php-config
5$ make
6$ make install
又看了一眼，是 php-fpm，居然没有 php.ini ，得，再生成一个，放在 /export/servers/php/lib/php.ini
1extension_dir = "/export/servers/php740/lib/php/extensions/no-debug-non-zts-20190902/"
2extension = sockets.so
然后重启 php-fpm ，重新 php -m 检查，发现有 socket 模块就 ok 了。
接下来就是 php 源代码了
1<?php
2date_default_timezone_set('Asia/Shanghai');
3
4function send_remote_syslog($message) {
5 $sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
6 foreach(explode("\n", $message) as $line) {
7 $syslog_message = "<22>" . date('M d H:i:s ') . 'Qi_an_xin sms_log: ' . $line;
8 socket_sendto($sock, $syslog_message, strlen($syslog_message), 0, '172.18.31.6', 514);
9 }
10 socket_close($sock);
11}
12
13 send_remote_syslog("ABC 验证码: 39792192");
14?>
这样就可以了，上面代码比较难理解的是<22>，那是报错级别的计算方法，Facility + Severity：
1 * Facility values:
2 * 0 kernel messages
3 * 1 user-level messages
4 * 2 mail system
5 * 3 system daemons
6 * 4 security/authorization messages
7 * 5 messages generated internally by syslogd
8 * 6 line printer subsystem
9 * 7 network news subsystem
10 * 8 UUCP subsystem
11 * 9 clock daemon
12 * 10 security/authorization messages
13 * 11 FTP daemon
14 * 12 NTP subsystem
15 * 13 log audit
16 * 14 log alert
17 * 15 clock daemon
18 * 16 local user 0 (local0) (default value)
19 * 17 local user 1 (local1)
20 * 18 local user 2 (local2)
21 * 19 local user 3 (local3)
22 * 20 local user 4 (local4)
23 * 21 local user 5 (local5)
24 * 22 local user 6 (local6)
25 * 23 local user 7 (local7)
26 *
27 * Severity values:
28 * 0 Emergency: system is unusable
29 * 1 Alert: action must be taken immediately
30 * 2 Critical: critical conditions
31 * 3 Error: error conditions
32 * 4 Warning: warning conditions
33 * 5 Notice: normal but significant condition (default value)
34 * 6 Informational: informational messages
35 * 7 Debug: debug-level messages
计算方法就是 （facility*8 + severity），这里的22+0，可以理解成 local6 ，就是级别6
如果发了一个 “local use 4” 和 Serverity = 5 的消息，那么就是 20×8+5=165 ，包头就是 <165>
