PHP - Manual: 运行时配置

2024-11-15

运行时配置

这些函数的行为受 php.ini 中的设置影响。

**文件系统和流配置选项**
名字	默认	可修改范围	更新日志
allow_url_fopen	"1"	PHP_INI_SYSTEM
allow_url_include	"0"	PHP_INI_SYSTEM	自 PHP 7.4.0 起废弃。
user_agent	NULL	PHP_INI_ALL
default_socket_timeout	"60"	PHP_INI_ALL
from	""	PHP_INI_ALL
auto_detect_line_endings	"0"	PHP_INI_ALL
sys_temp_dir	""	PHP_INI_SYSTEM

这是配置指令的简短说明。

allow_url_fopen bool

本选项激活了 URL 形式的 fopen 封装协议使得可以访问 URL 对象例如文件。默认的封装协议提供用 ftp 和 http 协议来访问远程文件，一些扩展库例如 zlib 可能会注册更多的封装协议。

allow_url_include bool

This option allows the use of URL-aware fopen wrappers with the following functions: include, include_once, require, require_once.

注意:
这个设置项需要开启 allow_url_fopen 。

user_agent string

定义 PHP 发送的 User-Agent。

default_socket_timeout int

指定基于 socket 的流的默认超时时间（秒）。指定一个负值意味着不会超时。

from string

这个 email 地址在使用 ftp 封装器的时候用于未认证的 FTP 连接，在使用 http 封装器的时候用于 HTTP 连接的消息头中的 From 字段。

auto_detect_line_endings bool

当设为 On 时，PHP 将检查通过 fgets() 和 file() 取得的数据中的行结束符号是符合 Unix，MS-DOS，还是 Macintosh 的习惯。

这使得 PHP 可以和 Macintosh 系统交互操作，但是默认值是 Off，因为在检测第一行的 EOL 习惯时会有很小的性能损失，而且在 Unix 系统下使用回车符号作为项目分隔符的人们会遭遇向下不兼容的行为。

sys_temp_dir string

add a note

User Contributed Notes 3 notes

down

133

Pistachio ¶

10 years ago


I'm surprised this isn't mentioned in docs here, but to set these values at runtime use "ini_set()". For example:

<?php
ini_set("auto_detect_line_endings", true);

// Now I can invoke fgets() on files that contain silly \r line endings. 
?>

down

-26

Chris ¶

5 years ago


If you want to use auto_detect_line_endings, e.g. to recognize carriage return on a Classic Mac file, you must set it before calling fopen. You can then reset it to its original value. E.g,

$original = ini_get("auto_detect_line_endings");
ini_set("auto_detect_line_endings", true);
$handle = fopen($someFile, "r");
ini_set("auto_detect_line_endings", $original);
while (($line = fgets($handle)) !== false) {
  echo "$line\n"; // etc
}

(Reference: https://bugs.php.net/bug.php?id=63341&edit=2)

Keep in mind also that Mac OS X bash does not handle carriage returns well, so if it seems like your code is not working when testing from the command line, redirect your output to a file and then try looking at that. On my system, doing it directly on the command line only showed the last line (with or without this setting turned on).

Also note that this will not do what you want if you have a file with mixed line endings (!). If you really care about that case, you have to do something else, like run the file through a translation first and then read it.

down

-27

traian dot bratucu at gmail dot com ¶

5 years ago


Please note that although you may try to set default_socket_timeout to something over 20s, you may get tricked by the Linux kernel.

The default value of tcp_syn_retries is set to 5, which will effectively timeout any TCP connection after roughly 20s, no matter what limits you set in PHP higher than this.

The value can be altered by root only, like this:

 echo 6 > /proc/sys/net/ipv4/tcp_syn_retries 

A value of 6, as above, will give you a timeout up to ~45s.

add a note

官方地址：https://www.php.net/manual/en/filesystem.configuration.php

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 开发编程科技 Elasticsearch HTML/CSS/XML 网络 JAVA NoSQL 数据库面试 C/C++ Golang Git 算法操作系统正则表达式 Redis 互联网 MySql JavaScript 运维软件国际架构设计 Mac OS TCP/IP Excel Vim Windows Socket Oracle VR MongoDB Python 运营 MemCache 商业硬件电子娱乐设计 nginx 摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 [PHP] inet_pton/inet_ntop IP地址转换函数 array_multisort() 多字段排序 PHPMailer设置utf8 PHPMailer字符集CharSet ADORecordSet对象 adodb手册 PHP 8.1 [鸟哥]PHP_INT_MIN 和 -9223372036854775808 opcache预加载 Composer的Packagist资源 mysql面试题 [鸟哥]PHP FFI详解 - 一种全新的PHP扩展方式 PHP7添加redis扩展 PHP mkdir()写出来的权限与mode值不符合 PHP获取指定函数定义在哪个文件中及行号支持php7的性能采集扩展 adodb连接mysql多个数据库的问题 php $_SERVER中的SERVER_NAME 和HTTP_HOST的区别

略微加速

PHP官方手册 - 互联网笔记

运行时配置

User Contributed Notes 3 notes