PHP Mail Introduction
PHP邮件函数介绍

The mail() function allows you to send emails directly from a script.
mail()函数用于使用脚本发送邮件

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Requirements
要求

For the mail functions to be available, PHP requires an installed and working email system. The program to be used is defined by the configuration settings in the php.ini file.
要使用邮件函数，要求具有一个邮件系统。所使用的程序在php.ini文件中设定。

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Installation
安装

The mail functions are part of the PHP core. There is no installation needed to use these functions.
本函数库作为 PHP 内核的一部分，不用安装就能使用。

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Runtime Configuration
运行时配置

The behavior of the mail functions is affected by settings in the php.ini file.
这些函数的行为受 php.ini 的影响。

Mail configuration options:
邮件函数配置选项

Name 名称	Default 默认值	Description 说明	Changeable 可修改范围
SMTP	"localhost"	Windows only: The DNS name or IP address of the SMTP server 仅Windows：SMTP服务器的名称或IP地址	PHP_INI_ALL
smtp_port	"25"	Windows only: The SMTP port number. Available since PHP 4.3 仅Windows：SMTP端口。自PHP 4.3	PHP_INI_ALL
sendmail_from	NULL	Windows only: Specifies the "from" address to be used in email sent from PHP 仅Windows：发件人地址	PHP_INI_ALL
sendmail_path	NULL	Unix systems only: Specifies where the sendmail program can be found (usually /usr/sbin/sendmail or /usr/lib/sendmail) 仅Unix：邮件发送程序（通常是/usr/sbin/sendmail或 /usr/lib/sendmail）	PHP_INI_SYSTEM

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PHP Mail Functions
PHP邮件函数

PHP: indicates the earliest version of PHP that supports the function.
PHP：最早支持这些函数的PHP版本

Function 函数	Description 说明	PHP
ezmlm_hash()	Calculates the hash value needed by the EZMLM mailing list system 计算EZMLM邮件列表系统所需的hash值	3
mail()	Allows you to send emails directly from a script 直接从脚本发送邮件	3

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PHP Mail Constants
PHP Mail 常量

None.无

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