PHP定时执行程序脚本的例子总结

<?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;
}
}

<?php
setcookie(“user”, “Alex Porter”, time()+3600);
?>

<?php
echo $_COOKIE["user"];
print_r($_COOKIE);
?>

<?php
if(isset($_COOKIE["user"]))
echo"Welcome".$_COOKIE["user"]."!<br>";
else
echo"Welcomeguest!<br>";
?>

<?php
  header ('Content-Type: text/plain; charset=ISO-8859-2');
  $encoded = unicode_encode ('＼u0150＼u0179', 'ISO-8859-2');
  echo 'Unicode semantics: ', ini_get ('unicode_semantics'), PHP_EOL, 'The string itself: ';
  printf ($encoded . PHP_EOL, '%s');
  echo 'The length of the string: ', strlen ($encoded);
?>

// 浏览页面次数
$visited = (int)$_COOKIE['pageVisits'] + 1;
setcookie( 'pageVisits',  // cookie名
$visited,  // cookie值
time()+7*24*60*60  // 过期时间
);

var cookie = $.cookie(‘demoCookie’);
if(cookie) $(‘.jq-text’).text(cookie).show();
$(‘.fields a’).click(function(e){
var text = $(‘#inputBox’).val();
// 设置cookie的值
$.cookie(‘demoCookie’,text,{expires: 7});
$(‘.jq-text’).text(text).slideDown(‘slow’);
e.preventDefault();
});
$(‘#form1′).submit(function(e){ e.preventDefault(); })

var cookie = $.cookie(‘demoCookie’);
获取键名demoCookie的值（如果不存在返回的是null）。

$.cookie(‘demoCookie’,text,{expires: 7});

//源图的路径，可以是本地文件，也可以是远程图片
$src_path = '1.jpg';
//最终保存图片的宽
$width = 160;
//最终保存图片的高
$height = 120;
 
//源图对象
$src_image = imagecreatefromstring(file_get_contents($src_path));
$src_width = imagesx($src_image);
$src_height = imagesy($src_image);
 
//生成等比例的缩略图
$tmp_image_width = 0;
$tmp_image_height = 0;
if ($src_width / $src_height >= $width / $height) {
    $tmp_image_width = $width;
    $tmp_image_height = round($tmp_image_width * $src_height / $src_width);
} else {
    $tmp_image_height = $height;
    $tmp_image_width = round($tmp_image_height * $src_width / $src_height);
}
 
$tmpImage = imagecreatetruecolor($tmp_image_width, $tmp_image_height);
imagecopyresampled($tmpImage, $src_image, 0, 0, 0, 0, $tmp_image_width, $tmp_image_height, $src_width, $src_height);
 
//添加白边
$final_image = imagecreatetruecolor($width, $height);
$color = imagecolorallocate($final_image, 255, 255, 255);
imagefill($final_image, 0, 0, $color);
 
$x = round(($width - $tmp_image_width) / 2);
$y = round(($height - $tmp_image_height) / 2);
 
imagecopy($final_image, $tmpImage, $x, $y, 0, 0, $tmp_image_width, $tmp_image_height);
 
//输出图片
header('Content-Type: image/jpeg');
imagejpeg($final_image);