运行时配置
这些函数的行为受 php.ini 中的设置影响。
名字 | 默认 | 可修改范围 | 更新日志 |
---|---|---|---|
define_syslog_variables | "0" | PHP_INI_ALL | 在PHP5.3.0中不推荐使用。在PHP5.4.0中删除 |
资源类型
此扩展名定义返回的文件指针资源fsockopen()
pfsockopen()
预定义常量
下列常量作为 PHP 核心的一部分总是可用的。
常数 | 描述 |
---|---|
LOG_CONS | if there is an error while sending data to the system logger, write directly to the system console |
LOG_NDELAY | open the connection to the logger immediately |
LOG_ODELAY | (default) delay opening the connection until the first message is logged |
LOG_NOWAIT | |
LOG_PERROR | print log message also to standard error |
LOG_PID | include PID with each message |
常数 | 描述 |
---|---|
LOG_AUTH | security/authorization messages (use LOG_AUTHPRIV instead in systems where that constant is defined) |
LOG_AUTHPRIV | security/authorization messages (private) |
LOG_CRON | clock daemon (cron and at) |
LOG_DAEMON | other system daemons |
LOG_KERN | kernel messages |
LOG_LOCAL0 ... LOG_LOCAL7 | reserved for local use, these are not available in Windows |
LOG_LPR | line printer subsystem |
LOG_MAIL | mail subsystem |
LOG_NEWS | USENET news subsystem |
LOG_SYSLOG | messages generated internally by syslogd |
LOG_USER | generic user-level messages |
LOG_UUCP | UUCP subsystem |
常数 | 描述 |
---|---|
LOG_EMERG | system is unusable |
LOG_ALERT | action must be taken immediately |
LOG_CRIT | critical conditions |
LOG_ERR | error conditions |
LOG_WARNING | warning conditions |
LOG_NOTICE | normal, but significant, condition |
LOG_INFO | informational message |
LOG_DEBUG | debug-level message |
常数 | 描述 |
---|---|
DNS_A | IPv4 Address Resource |
DNS_CAA | Certification Authority Authorization Resource (available as of PHP 7.0.16 and 7.1.2) |
DNS_MX | Mail Exchanger Resource |
DNS_CNAME | Alias (Canonical Name) Resource |
DNS_NS | Authoritative Name Server Resource |
DNS_PTR | Pointer Resource |
DNS_HINFO | Host Info Resource (See IANA's » Operating System Names for the meaning of these values) |
DNS_SOA | Start of Authority Resource |
DNS_TXT | Text Resource |
DNS_ANY | Any Resource Record. On most systems this returns all resource records, however it should not be counted upon for critical uses. Try DNS_ALL instead. |
DNS_AAAA | IPv6 Address Resource |
DNS_ALL | Iteratively query the name server for each available record type. |