php+ajax 实例入门教程

php+js 实例入门教程网上很多，我们这款是边学边来看实例哦，告诉你快速入门ajax哦。

function checkfortasks (thedate, e){
//找到页面中taskbox对应<div>设置为可见
theObject = document.getElementById("taskbox");
theObject.style.visibility = "visible";
//初始化taskbox位置
var posx = 0;
var posy = 0;
//定位taskbox位置为鼠标位置
posx = e.clientX + document.body.scrollLeft;
posy = e.clientY + document.body.scrollTop;
theObject.style.left = posx + "px";
theObject.style.top = posy + "px";
//设置PHP请求页面
serverPage = "taskchecker.php?thedate=" + thedate;
//设置PHP返回数据替换位置
objID = "taskbox";
var obj = document.getElementById(objID);
//发送请求并加载返回数据
xmlhttp.open("GET", serverPage);
xmlhttp.onreadystatechange = function(){
if (xmlhttp.readyState == 4 && xmlhttp.status == 200){
obj.innerHTML = xmlhttp.responseText;
}
}
xmlhttp.send(null);
}

function autocomplete (thevalue, e){
//定位页面中autocompletediv（显示检索姓名的标签）的<div>位置
theObject = document.getElementById("autocompletediv");
//设置为可见
theObject.style.visibility = "visible";
theObject.style.width = "152px";
//设置检索标签位置
var posx = 0;
var posy = 0;
posx = (findPosX (document.getElementById("yourname")) + 1);
posy = (findPosY (document.getElementById("yourname")) + 23);
theObject.style.left = posx + "px";
theObject.style.top = posy + "px";
//设定事件为键盘录入
var theextrachar = e.which;
if (theextrachar == undefined){
theextrachar = e.keyCode;
}
//设定加载检索名单位置
var objID = "autocompletediv";
//设定PHP请求页面，并将用户输入的姓名传值过去（同时考虑到Backspace作用）
if (theextrachar == 8){
if (thevalue.length == 1){
var serverPage = "autocomp.php";
}
else{
var serverPage = "autocomp.php" + "?sstring=" + thevalue.substr(0, (thevalue.length -1));
}
}
else{
var serverPage = "autocomp.php" + "?sstring=" + thevalue + String.fromCharCode(theextrachar);
}
//发送请求并加载返回数据
var obj = document.getElementById(objID);
xmlhttp.open("GET", serverPage);
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
obj.innerHTML = xmlhttp.responseText;
}
}
xmlhttp.send(null);
}

php 删除数据键值代码

/**
  * 删除key为指定的key里的值
  * @param array $array 操作的数组
  * @param string $key 键值可以是数组
  * @return void
  */
 public static function delete(&$array, $key) {
  if (!is_array($key)) {
   $key = array($key);
  }
  foreach ($key as $k) {
   unset($array[$k]);
  }
  $array = array_values($array);
 }

php 删除文件与目录代码

function del($name) {
  if (!is_dir($name)) {
   return @unlink($name);
  } else {
   $dir = opendir($name);
   while( $file = readdir( $dir ) ) {
    if (($file=='.')||($file=='..')) continue;
    if (is_dir($name.'/'.$file)) $this->del($name.'/'.$file);
    else echo basename($file), @unlink($name.'/'.$file) ? ' Success!' : ' False.', '<br />';
   }
  closedir($dir);
  }
  return @rmdir($name);
 }

php 复制文件

function copy($from, $to) {
  if ($this->abspath($to)=="/") $to=$this->basedir;
  if ($this->dirname($from) == $this->dirname($to)) $to = $this->dirname($to).'/复件'.basename($from);
  if (!is_dir($from)) {
   return @copy($from, $to);
  } else {
   if (!is_dir($to)) @mkdir($to);
   $path = opendir($from);
   while( $file = readdir( $path ) ) {
    if (($file=='.')||($file=='..')) continue;
    if (is_dir($from.'/'.$file)) $this->copy($from.'/'.$file, $to.'/'.$file);
    else echo basename($file), copy($from.'/'.$file, $to.'/'.$file) ? ' Success!' : ' False.', '<br />';
   }
   return true;
  }
 }

日期所在月的天数
  * @return int  add
  */
 public function daysOfMonth ($year=NULL,$month=NULL) {
  if ($year===NULL) {
   $year = $this->getPart('yy');
  }
  if ($month===NULL) {
   $month = $this->getPart('mm');
  }
  if ($month==2)
  {
   if (($year % 4 == 0 && $year % 100 != 0) || $year % 400 == 0)
    $result = 29;
   else
    $result = 28;
  }
  elseif ($month == 4 || $month == 6 || $month == 9 || $month == 11)
   $result = 30;
  else
   $result = 31;
  return $result;
 }