PHP CURL或file_get_contents获取网页标题的代码

<?php
$c = curl_init();
$url = 'www.111cn.net';
curl_setopt($c, CURLOPT_URL, $url);
curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
$data = curl_exec($c);
curl_close($c);
$pos = strpos($data,'utf-8');
if($pos===false){$data = iconv("gbk","utf-8",$data);}
preg_match("/<title>(.*)<＼/title>/i",$data, $title);
echo $title[1];
?>

<?php
$content=file_get_contents("http://www.111cn.net/");
$pos = strpos($content,'utf-8');
if($pos===false){$content = iconv("gbk","utf-8",$content);}
$postb=strpos($content,'<title>')+7;
$poste=strpos($content,'</title>');
$length=$poste-$postb;
echo substr($content,$postb,$length);
?>

<?php
ignore_user_abort(); // 关掉浏览器，PHP脚本也可以继续执行
set_time_limit(600); // 设置程序的执行时间为600秒
// set_time_limit(0); // 设置程序的执行时间为无限长
$interval = 5; // 每隔5秒运行

do {
    $fp = fopen('sjyhome.txt', 'a'); // 打开 sjyhome.txt
    fwrite($fp, '欢迎来到SJY之家 www.111cn.net'); // 往 sjyhome.txt 写入信息
    fclose($fp); // 关闭 sjyhome.txt
    sleep($interval); // 等待5秒
} while (true);
?>

<?php

ignore_user_abort();//关掉浏览器，PHP脚本也可以继续执行

set_time_limit(20);//程序超时时间，单位秒；通过set_time_limit(0)可以让程序无限制的执行下去；当用了set_time_limit()函数设置运行时间，sleep()函数在执行程序时的持续时间将会被忽略掉

$interval=5;//每隔多少秒运行，单位：秒

do{
//这里是你要执行的代码
$i = 1;
$num_file = "number.txt";
$fp = fopen($num_file,"r");
$buf = fread($fp,filesize($num_file));
fclose($fp);

$number = file_get_contents($num_file);
$number = $number+$i;
$fp = fopen($num_file,"w");
fwrite($fp,$number);
fclose($fp);
echo $number;

//等待执行的时间
sleep($interval);
}
while(true);

?>

<?php
 if($_GET['ac']=='stop')
 exit();
 sleep(5);
 $name=time();
 $fp=fopen("$name.txt",'w');
 fwrite($fp,time());
 fclose($fp);
 $fp = fsockopen('localhost', 80, $errno, $errmsg);
 fputs($fp, "GET /test/time.php＼r＼n＼r＼n");
 fclose($fp);
 ?>

<?php
ignore_user_abort(true);
set_time_limit(0);while(1){
$fp  = fopen('time_task.txt',"a+");
$str = date("Y-m-d h:i:s")."n";
fwrite($fp,$str);
fclose($fp);
sleep(1800);    //半小时执行一次
if(!file_exists('1.txt'))
     exit();          //在目录下建立一个文件1.txt，如果文件存在一直执行，如果文件不存在则退出
}
?>

补充这样也可以

<?php
ignore_user_abort();//关闭浏览器后，继续执行php代码
set_time_limit(0);//程序执行时间无限制
$sleep_time = 5;//多长时间执行一次
$switch = include 'switch.php';
while($switch){
$switch = include 'switch.php';
$fp = fopen('test.txt','a+');
fwrite($fp,"这是一个php博客：phpddt.com $switch ＼n");
fclose($fp);
sleep($sleep_time);
}
exit();

?>

class upload {
private $file_name = ‘null’; #客户端文件名
private $file_size = 0; #文件大小
private $file_tmpName = ”; #临时文件夹路径
private $upload_type = array(‘jpg’,'jpeg’,'gif’,'png’); #允许上传的文件类型
private $upload_Ext = ‘null’; #文件后缀
private $upload_dir = ‘null’; #新路径
private $upload_name = ‘null’; #新文件名
private $upload_width = 0; #图片宽度
private $upload_height = 0; #图片高度
private $upload_msg = ”; #上传消息
private $upload_mode; #上传状态
/**
* 构造函数,自动上传
* @access public
* @param string $control 文件域控件名
* @param string $filePath 保存路径
* @param string $fileName 新文件名,不带后缀
* @param array $fileType 允许上传的文件后缀
* @param int $size 允许上传的文件大小,以字节为单位
*/
public function __construct($control=”,$filePath=”,$fileName=”,$fileType=”,$size=0) {
$this->upload_mode = true;
if($control==”)
$this->error(‘上传的文件域控件名不能为空’);
else{
$this->file_name=$_FILES[$control]['name'];
$this->file_size=$_FILES[$control]['size'];
$this->file_tmpName=$_FILES[$control]['tmp_name'];
if($fileType!=”)
$this->upload_type = $fileType;
if($filePath==”)
$this->upload_dir=’./’;
else
$this->upload_dir=$filePath;
if(!is_uploaded_file($this->file_tmpName))
$this->error(‘没有文件被上传’);
else{
if($size!=0&&$this->file_size>$size)
$this->error(‘上传的图片文件不能大于’.$this->getSize($size));
if(!$this->typeDetect($this->file_name))
$this->error(‘不支持上传此类型的文件’);
else{
if(!$this->fileDetect($this->file_tmpName))
$this->error(‘上传的图片文件无效或已经损坏’);
}
if($fileName==”)
$this->upload_name=$this->file_name;
else
$this->upload_name=$fileName.’.’.$this->upload_Ext;
}
}
//开始保存文件
if($this->mode)
$this->saveFile();
}
/**
* 获取属性
* @access public
* @param string 属性名
* @return 属性值
*/
public function __get($name){
switch($name){
case ‘path’:
return $this->upload_dir;
break;
case ‘name’:
return $this->upload_name;
break;
case ‘ext’:
return $this->upload_Ext;
break;
case ‘size’:
return $this->getSize($this->file_size);
case ‘width’:
return $this->upload_width;
break;
case ‘height’:
return $this->upload_height;
break;
case ‘mode’:
return $this->upload_mode;
break;
case ‘msg’:
return $this->upload_msg;
break;
}
}
/**
* 检测文件后缀名
* @access public
* @return bool
*/
private function typeDetect($OldFile){
$tempArr = explode(“.”, $OldFile);
$fileExt = array_pop($tempArr);
$fileExt = trim($fileExt);
$fileExt = strtolower($fileExt);
if(in_array($fileExt,$this->upload_type)){
$this->upload_Ext=$fileExt;
return true;
}
else
return false;
}
/**
* 检测上传文件是否是有效图片格式
* @access private
* @return bool
*/
private function fileDetect($tmpName){
$arr = getimagesize($tmpName);
if(!$arr){
return false;
}else{
$this->upload_width = $arr[0];
$this->upload_height = $arr[1];
return true;
}
}
/**
* 保存文件
* @access private
*/
private function saveFile(){
if(!is_dir($this->upload_dir)){
mkdir($this->upload_dir, 0777);
chmod($this->upload_dir, 0777);
}
$save_file = move_uploaded_file($this->file_tmpName,$this->upload_dir.$this->upload_name);
if(!$save_file)
$this->error(‘文件写入失败’);
else
$this->upload_msg=’文件上传成功’;
}
/**
* 获取文件大小
* @return string 返回B,KB,MB单位
*/
private function getSize($tmpSize){
$value = ‘B’;
if($tmpSize>1024){
$tmpSize = floor($tmpSize/1024);
$value = ‘KB’;
}
if($tmpSize>1024){
$tmpSize = round($tmpSize/1024,2);
$value = ‘MB’;
}
return $tmpSize.$value;
}
/**
* 错误提示
* @access private
* @param string $msg 错误信息
*/
private function error($msg=”){
$this->upload_msg .= $msg;
$this->upload_mode = false;
}
}