php默认不支持mail()函数吗？怎么会出现下面的错误提示？

[chlinux]

Fatal error: Call to undefined function: mail() in /var/www/htdocs/mail.php on line 3


我的php.ini的相关信息如下：
sendmail_from=[e-mail]
sendmail_path = /usr/local/qmail/bin/sendmail
smtp_port=25

[sports98]

你尝试改用
sendmail_path=/usr/sbin/sendmail -t -i

[zsyk]

可能是你的程序代码写错了,或者有毛病.

[Jade]

提供空间的服务商一般不提供.php安装后,应该也不是默认安装的.

[chenxee]

不要用mail函数发mail了!!

用pear库里的类或者socket发吧!!

[chlinux]

这个可以吗?我在网上找的.
<?php
class send_mail{
var $lastmessage; //记录最后返回的响应信息
var $lastact; //最后的动作，字符串形式
var $welcome; //用在HELO后面，欢迎用户
var $debug; //是否显示调试信息
var $smtp; //smtp服务器
var $port; //smtp端口号
var $fp; //socket句柄
function send_mail($smtp, $welcome="", $debug=false)
{
if(empty($smtp)) die("SMTP cannt be NULL!");
$this->smtp=$smtp;
if(empty($welcome))
{
$this->welcome=gethostbyaddr("61.243.232.26");
}
else
$this->welcome=$welcome;
$this->debug=$debug;
$this->lastmessage="";
$this->lastact="";
$this->port="25";
}
function show_debug($message, $inout)
{
if ($this->debug)
{
if($inout=="in") //响应信息
{
$m='<< ';
}
else
$m='>> ';
if(!ereg("\n$", $message))
$message .= "<br>";
$message=nl2br($message);
echo "<font color=#999999>${m}${message}</font>";
}
}
function do_command($command, $code)
{
$this->lastact=$command;
$this->show_debug($this->lastact, "out");
fputs ( $this->fp, $this->lastact );
$this->lastmessage = fgets ( $this->fp, 512 );
$this->show_debug($this->lastmessage, "in");
if(!ereg("^$code", $this->lastmessage))
{
return false;
}
else
return true;
}
function send( $to,$from,$subject,$message)
{

//连接服务器
$this->lastact="connect";

$this->show_debug("Connect to SMTP server : ".$this->smtp, "out");
$this->fp = fsockopen ( $this->smtp, $this->port );
if ( $this->fp )
{

set_socket_blocking( $this->fp, true );
$this->lastmessage=fgets($this->fp,512);
$this->show_debug($this->lastmessage, "in");

if (! ereg ( "^220", $this->lastmessage ) )
{
return false;
}
else
{
$this->lastact="HELO " . $this->welcome . "\n";
if(!$this->do_command($this->lastact, "250"))
{
fclose($this->fp);
return false;
}

$this->lastact="MAIL FROM: $from" . "\n";
if(!$this->do_command($this->lastact, "250"))
{
fclose($this->fp);
return false;
}

$this->lastact="RCPT TO: $to" . "\n";
if(!$this->do_command($this->lastact, "250"))
{
fclose($this->fp);
return false;
}

//发送正文
$this->lastact="DATA\n";
if(!$this->do_command($this->lastact, "354"))
{
fclose($this->fp);
return false;
}

//处理Subject头
$head="Subject: $subject\n";
if(!empty($subject) && !ereg($head, $message))
{
$message = $head.$message;
}

//处理From头
$head="From: $from\n";
if(!empty($from) && !ereg($head, $message))
{
$message = $head.$message;
}

//处理To头
$head="To: $to\n";
if(!empty($to) && !ereg($head, $message))
{
$message = $head.$message;
}

//加上结束串
if(!ereg("\n\.\n", $message))
$message .= "\n.\n";
$this->show_debug($message, "out");
fputs($this->fp, $message);

$this->lastact="QUIT\n";
if(!$this->do_command($this->lastact, "250"))
{
fclose($this->fp);
return false;
}
}
return true;
}
else
{
$this->show_debug("Connect failed!", "in");
return false;
}
}


}

?>