邮件发送还有问题吗？送大家一个写好的类吧,支持stmp认证、HTML格式邮件

答案：c_smtp_client.php
<?php
/* smtp client class */
class c_smtp_client 
{ 
    var $connection; 
    var $server; 
    var $elog_fp; 
    var $log_file='./smtp_client.log'; 
    var $do_log=true; 
    var $need_auth=true;
    var $username;
    var $password;

    // 构造器
    function c_smtp_client($server='') 
    { 
        if (!$server)
        {
            $this->server="localhost"; 
        }
        else 
        {
            $this->server=$server; 
        }

        $this->connection = fsockopen($this->server, 25); 
        if ($this->connection <= 0) return 0; 
        fputs($this->connection,"HELO xyz\r\n"); 
    } 
    
    function email($from_mail, $to_mail, $to_name, $header, $subject, $body) 
    { 
        if ($this->connection <= 0) return 0; 
        
        // 邮件用户认证
        if ($this->need_auth)
        {
            $this->elog("AUTH LOGIN", 1); 
            fputs($this->connection,"AUTH LOGIN\r\n"); 
            $this->elog(fgets($this->connection, 1024)); 
             
            $base64_username=base64_encode($this->username);
            $this->elog("$base64_username", 1);
            fputs($this->connection,"$base64_username\r\n"); 
            $this->elog(fgets($this->connection, 1024));

            $base64_password=base64_encode($this->password);
            $this->elog("$base64_password", 1); 
            fputs($this->connection,"$base64_password\r\n"); 
            $this->elog(fgets($this->connection, 1024));
        }

        $this->elog("MAIL FROM:$from_mail", 1); 
        fputs($this->connection,"MAIL FROM:$from_mail\r\n"); 
        $this->elog(fgets($this->connection, 1024)); 
        
        $this->elog("RCPT TO:$to_mail", 1); 
        fputs($this->connection, "RCPT TO:$to_mail\r\n"); 
        $this->elog(fgets($this->connection, 1024)); 
        
        $this->elog("DATA", 1); 
        fputs($this->connection, "DATA\r\n"); 
        $this->elog(fgets($this->connection, 1024)); 

        $this->elog("Subject: $subject", 1); 
        $this->elog("To: $to_name", 1); 
        fputs($this->connection,"Subject: $subject\r\n"); 
        fputs($this->connection,"To: $to_name\r\n"); 

        if ($header) 
        { 
            $this->elog($header, 1); 
            fputs($this->connection, "$header\r\n"); 
        } 

        $this->elog("", 1); 
        $this->elog($body, 1); 
        $this->elog(".", 1); 
        fputs($this->connection,"\r\n"); 
        fputs($this->connection,"$body \r\n"); 
        fputs($this->connection,".\r\n"); 
        $this->elog(fgets($this->connection, 1024)); 

        return 1; 
    } 


    function send() 
    { 
        if ($this->connection) 
        { 
            fputs($this->connection, "QUIT\r\n"); 
            fclose($this->connection); 
            $this->connection=0; 
        } 
    } 

    function close() 
    { 
        $this->send(); 
    } 

    function elog($text, $mode=0) 
    { 
        if (!$this->do_log) return; 

        // open file 
        if (!$this->elog_fp) 
        { 
            if (!($this->elog_fp=fopen($this->log_file, 'a'))) return; 
            fwrite($this->elog_fp, "\n-------------------------------------------\n"); 
            fwrite($this->elog_fp, " Sent " . date("Y-m-d H:i:s") . "\n"); 
            fwrite($this->elog_fp, "-------------------------------------------\n"); <

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