当服务端在循环中第一次发送2222的时候，客户端由于已经断开连接了，返回的是一个RST，但是这个发送过程算是请求成功了。直到第二次服务端再 次想往这个socket中进行write操作的时候，这个socket就不进行网络传输了，直接返回说connection的状态已经为abort。所以 就出现了上面的情况，第一次222是status为0，第二次的时候才出现abort。
strace进行验证
我们也可以使用strace php -S XXX来进行验证
整个过程strace的日志如下：
close(5) = 0 lstat("/tmp/test.log", {st_mode=S_IFREG|0644, st_size=49873651, ...}) = 0 open("/tmp/test.log", O_WRONLY|O_CREAT|O_APPEND, 0666) = 5 fstat(5, {st_mode=S_IFREG|0644, st_size=49873651, ...}) = 0 lseek(5, 0, SEEK_CUR) = 0 lseek(5, 0, SEEK_CUR) = 0 flock(5, LOCK_EX) = 0 write(5, "1 connection status: 0abort:0\n", 30) = 30 close(5) = 0 sendto(4, "HTTP/1.0 200 OK\r\nConnection: clo"..., 89, 0, NULL, 0) = 89 sendto(4, "111111111", 9, 0, NULL, 0) = 9 rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0 rt_sigaction(SIGCHLD, NULL, {SIG_DFL, [], 0}, 8) = 0 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 nanosleep({3, 0}, 0x7fff60a40290) = 0 sendto(4, "22222", 5, 0, NULL, 0) = 5 open("/tmp/test.log", O_WRONLY|O_CREAT|O_APPEND, 0666) = 5 fstat(5, {st_mode=S_IFREG|0644, st_size=49873681, ...}) = 0 lseek(5, 0, SEEK_CUR) = 0 lseek(5, 0, SEEK_CUR) = 0 flock(5, LOCK_EX) = 0 write(5, "2 connection status: 0abort:0\n", 30) = 30 close(5) = 0 rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0 rt_sigaction(SIGCHLD, NULL, {SIG_DFL, [], 0}, 8) = 0 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 nanosleep({1, 0}, 0x7fff60a40290) = 0 sendto(4, "22222", 5, 0, NULL, 0) = -1 EPIPE (Broken pipe) --- SIGPIPE {si_signo=SIGPIPE, si_code=SI_USER, si_pid=2819, si_uid=0} --- open("/tmp/test.log", O_WRONLY|O_CREAT|O_APPEND, 0666) = 5 fstat(5, {st_mode=S_IFREG|0644, st_size=49873711, ...}) = 0 lseek(5, 0, SEEK_CUR) = 0 lseek(5, 0, SEEK_CUR) = 0 flock(5, LOCK_EX) = 0 write(5, "2 connection status: 1abort:1\n", 30) = 30 close(5) = 0 rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0 rt_sigaction(SIGCHLD, NULL, {SIG_DFL, [], 0}, 8) = 0 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 nanosleep({1, 0}, 0x7fff60a40290) = 0 open("/tmp/test.log", O_WRONLY|O_CREAT|O_APPEND, 0666) = 5 fstat(5, {st_mode=S_IFREG|0644, st_size=49873741, ...}) = 0 lseek(5, 0, SEEK_CUR) = 0 lseek(5, 0, SEEK_CUR) = 0 flock(5, LOCK_EX) = 0 write(5, "2 connection status: 1abort:1\n", 30) = 30 close(5) 。。。我们照中看status从0到1转变的地方。 ... sendto(4, "22222", 5, 0, NULL, 0) = 5 ... write(5, "2 connection status: 0abort:0\n", 30) = 30 close(5) = 0 rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0 rt_sigaction(SIGCHLD, NULL, {SIG_DFL, [], 0}, 8) = 0 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 nanosleep({1, 0}, 0x7fff60a40290) = 0 sendto(4, "22222", 5, 0, NULL, 0) = -1 EPIPE (Broken pipe) --- SIGPIPE {si_signo=SIGPIPE, si_code=SI_USER, si_pid=2819, si_uid=0} --- open("/tmp/test.log", O_WRONLY|O_CREAT|O_APPEND, 0666) = 5 fstat(5, {st_mode=S_IFREG|0644, st_size=49873711, ...}) = 0 lseek(5, 0, SEEK_CUR) = 0 lseek(5, 0, SEEK_CUR) = 0 flock(5, LOCK_EX) = 0 write(5, "2 connection status: 1abort:1\n", 30) = 30 close(5)
第二次往socket中发送2222的时候显示了Broken pipe。这就是程序告诉我们，这个socket已经不能使用了，顺便php中的connection_status就会被设置为1了。后续的写操作也都不会再执行了。
总结
正常情况下，如果客户端client异常推出了，服务端的程序还是会继续执行，直到与IO进行了两次交互操作。服务端发现客户端已经断开连接，这个 时候会触发一个user_abort，如果这个没有设置ignore_user_abort，那么这个php-fpm的程序才会被中断。
至此，问题结了。
以上这篇深入剖析浏览器退出之后php还会继续执行么就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持脚本之家。
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