今天小编带领大家一起学习有关编程语言的内容，在课课家让我们熟练的驾驭编程语言的天空，让我们一起感受知识的力量 

wellIOBE 编程语言社区排行榜是编程语言流行趋势的一个指标，每月更新，这份排行榜排名基于互联网上有经验的程序员、课程和第三方厂商的数量。排名使用著名的搜索引擎（诸如 Google、MSN、Yahoo!、Wikipedia、YouTube 以及 Baidu 等）进行计算。请注意这个排行榜只是反映某个编程语言的热门程度，并不能说明一门编程语言好不好，或者一门语言所编写的代码数量多少。 教育资源可能会影响结果。例如Python是常用的学校和学习编程途径，成千上万的学生问问题和完成项目。不过根据我的经验来说，Python的工作相比PHP和Ruby来说是罕见的。Java也有类似的情况，因为它在教育、网络、桌面和移动发展上有各种各样的用途，所以它们的排名会相对靠前。

本地开发者的需求仍然很高，尤其是在相关工作的调查中可以看出。RedMonk报告Swift在不到六个月的时间里上升了46个排名达到第22位。然而应用开发是一门年轻的学科。目前有更多的Web和桌面编程职位空缺着。 "

以下为引用的内容php实例教程： class smtp {     /* Public Variables */     var $smtp_port;     var $time_out;     var $host_name;     var $log_file;     var $relay_host;     var $debug;     var $auth;     var $user;     var $pass;     /* Private Variables */     var $sock;     /* Constractor */     function smtp($relay_host = "", $smtp_port = 25,$auth = false,$user,$pass)     {         $this->debug = FALSE;         $this->smtp_port = $smtp_port;         $this->relay_host = $relay_host;         $this->time_out = 30; //is used in fsockopen()         #         $this->auth = $auth;//auth         $this->user = $user;         $this->pass = $pass;         #         $this->host_name = "localhost"; //is used in HELO command         $this->log_file = "";         $this->sock = FALSE;     }     /* Main Function */     function sendmail($to, $from, $subject = "", $body = "", $mailtype, $cc = "", $bcc = "", $additional_headers = "")     {         $mail_from = $this->get_address($this->strip_comment($from));         $body = ereg_replace("(^|(\\\\r\\\\n))(\\\\.)", "\\\\1.\\\\3", $body);         $header = "MIME-Version:1.0\\\\r\\\\n";         if($mailtype=="HTML"){             $header .= "Content-Type:text/html\\\\r\\\\n";         }         $header .= "To: ".$to."\\\\r\\\\n";         if ($cc != "") {             $header .= "Cc: ".$cc."\\\\r\\\\n";         }         $header .= "From: $from<".$from.">\\\\r\\\\n";         $header .= "Subject: ".$subject."\\\\r\\\\n";         $header .= $additional_headers;         $header .= "Date: ".date("r")."\\\\r\\\\n";         $header .= "X-Mailer:By Redhat (PHP/".phpversion().")\\\\r\\\\n";         list($msec, $sec) = explode(" ", microtime());         $header .= "Message-ID: <".date("YmdHis", $sec).".".($msec*1000000).".".$mail_from.">\\\\r\\\\n";         $TO = explode(",", $this->strip_comment($to));         if ($cc != "") {             $TO = array_merge($TO, explode(",", $this->strip_comment($cc)));         }         if ($bcc != "") {             $TO = array_merge($TO, explode(",", $this->strip_comment($bcc)));         }         $sent = TRUE;         foreach ($TO as $rcpt_to) {             $rcpt_to = $this->get_address($rcpt_to);             if (!$this->smtp_sockopen($rcpt_to)) {                 $this->log_write("Error: Cannot send email to ".$rcpt_to."\\\\n");                 $sent = FALSE;                 continue;             }             if ($this->smtp_send($this->host_name, $mail_from, $rcpt_to, $header, $body)) {                 $this->log_write("E-mail has been sent to <".$rcpt_to.">\\\\n");             } else {                 $this->log_write("Error: Cannot send email to <".$rcpt_to.">\\\\n");                 $sent = FALSE;             }             fclose($this->sock);             $this->log_write("Disconnected from remote host\\\\n");         }         return $sent;     } /* Private Functions */     function smtp_send($helo, $from, $to, $header, $body = "")     {         if (!$this->smtp_putcmd("HELO", $helo)) {             return $this->smtp_error("sending HELO command");         }         #auth         if($this->auth){             if (!$this->smtp_putcmd("AUTH LOGIN", base64_encode($this->user))) {                 return $this->smtp_error("sending HELO command");             }             if (!$this->smtp_putcmd("", base64_encode($this->pass))) {                 return $this->smtp_error("sending HELO command");             }         }         #         if (!$this->smtp_putcmd("MAIL", "FROM:<".$from.">")) {             return $this->smtp_error("sending MAIL FROM command");         }         if (!$this->smtp_putcmd("RCPT", "TO:<".$to.">")) {             return $this->smtp_error("sending RCPT TO command");         }         if (!$this->smtp_putcmd("DATA")) {             return $this->smtp_error("sending DATA command");         }         if (!$this->smtp_message($header, $body)) {             return $this->smtp_error("sending message");         }         if (!$this->smtp_eom()) {             return $this->smtp_error("sending . [EOM]");         }         if (!$this->smtp_putcmd("QUIT")) {             return $this->smtp_error("sending QUIT command");         }         return TRUE;     }     function smtp_sockopen($address)     {         if ($this->relay_host == "") {             return $this->smtp_sockopen_mx($address);         } else {             return $this->smtp_sockopen_relay();         }     }     function smtp_sockopen_relay()     {         $this->log_write("Trying to ".$this->relay_host.":".$this->smtp_port."\\\\n");         $this->sock = @fsockopen($this->relay_host, $this->smtp_port, $errno, $errstr, $this->time_out);         if (!($this->sock && $this->smtp_ok())) {             $this->log_write("Error: Cannot connenct to relay host ".$this->relay_host."\\\\n");             $this->log_write("Error: ".$errstr." (".$errno.")\\\\n");             return FALSE;         }         $this->log_write("Connected to relay host ".$this->relay_host."\\\\n");         return TRUE;     }     function smtp_sockopen_mx($address)     {         $domain = ereg_replace("^.+@([^@]+)$", "\\\\1", $address);         if (!@getmxrr($domain, $MXHOSTS)) {             $this->log_write("Error: Cannot resolve MX \\\\"".$domain."\\\\"\\\\n");             return FALSE;         }         foreach ($MXHOSTS as $host) {             $this->log_write("Trying to ".$host.":".$this->smtp_port."\\\\n");             $this->sock = @fsockopen($host, $this->smtp_port, $errno, $errstr, $this->time_out);             if (!($this->sock && $this->smtp_ok())) {                 $this->log_write("Warning: Cannot connect to mx host ".$host."\\\\n");                 $this->log_write("Error: ".$errstr." (".$errno.")\\\\n");                 continue;             }             $this->log_write("Connected to mx host ".$host."\\\\n");             return TRUE;         }         $this->log_write("Error: Cannot connect to any mx hosts (".implode(", ", $MXHOSTS).")\\\\n");         return FALSE;     }     function smtp_message($header, $body)     {         fputs($this->sock, $header."\\\\r\\\\n".$body);         $this->smtp_debug("> ".str_replace("\\\\r\\\\n", "\\\\n"."> ", $header."\\\\n> ".$body."\\\\n> "));         return TRUE;     }     function smtp_eom()     {         fputs($this->sock, "\\\\r\\\\n.\\\\r\\\\n");         $this->smtp_debug(". [EOM]\\\\n");         return $this->smtp_ok();     }     function smtp_ok()     {         $response = str_replace("\\\\r\\\\n", "", fgets($this->sock, 512));         $this->smtp_debug($response."\\\\n");         if (!ereg("^[23]", $response)) {             fputs($this->sock, "QUIT\\\\r\\\\n");             fgets($this->sock, 512);             $this->log_write("Error: Remote host returned \\\\"".$response."\\\\"\\\\n");             return FALSE;         }         return TRUE;     }     function smtp_putcmd($cmd, $arg = "")     {         if ($arg != "") {             if($cmd=="") $cmd = $arg;             else $cmd = $cmd." ".$arg;         }         fputs($this->sock, $cmd."\\\\r\\\\n");         $this->smtp_debug("> ".$cmd."\\\\n");         return $this->smtp_ok();     }     function smtp_error($string)     {         $this->log_write("Error: Error occurred while ".$string.".\\\\n");         return FALSE;     }     function log_write($message)     {         $this->smtp_debug($message);         if ($this->log_file == "") {             return TRUE;         }         $message = date("M d H:i:s ").get_current_user()."[".getmypid()."]: ".$message;         if (!@file_exists($this->log_file) || !($fp = @fopen($this->log_file, "a"))) {             $this->smtp_debug("Warning: Cannot open log file \\\\"".$this->log_file."\\\\"\\\\n");             return FALSE;;         }         flock($fp, LOCK_EX);         fputs($fp, $message);         fclose($fp);         return TRUE;     }     function strip_comment($address)     {         $comment = "\\\\([^()]*\\\\)";         while (ereg($comment, $address)) {             php实例教程$address = ereg_replace($comment, "", $address);         }         return $address;     }     function get_address($address)     {         $address = ereg_replace("([ \\\\t\\\\r\\\\n])+", "", $address);         $address = ereg_replace("^.*<(.+)>.*$", "\\\\1", $address);         return $address;     }     function smtp_debug($message)     {         if ($this->debug) {         echo $message;         }     } } ?>

文章学习完是不是意犹未尽，还有很多地方不懂更多视频教程尽在课课家官方网站，让我们一起沉浸在知识的海洋。