PHP入门

<script language="网页特效">
function startrequestusingpost() {
         if(checktitle()==false)
         {
               return;
         }
           var title = document.getelementbyid("title").value;
           createxmlhttprequest();
           xmlhttp.open("post","checkntype",true);
           xmlhttp.onreadystatechange = processresponse;
           xmlhttp.setrequestheader("content-type","application/x-www-form-urlencoded");
           xmlhttp.send("title=" + title);
      }
     
      function processresponse() {
           if(xmlhttp.readystate == 4) {
                if(xmlhttp.status == 200) {
                    var result = xmlhttp.responsetext;
              if(result==1){
                document.getelementbyid("message").style.display="inline";
                document.getelementbyid("btnadd").disabled="disabled";
                }else
                {
                  document.getelementbyid("message").style.display="none";
                 document.getelementbyid("btnadd").disabled="";
                 }
                }
           }
      }
      function checktitle()
      {
       var title=document.getelementbyid("title").value;
          if(title=="")
          {
           document.getelementbyid("lbltitle").style.display="inline";
            return false;
          }else
          {
          document.getelementbyid("lbltitle").style.display="none";
           return true;
       }
      }

$a=array("red", "green", "blue", "yellow");   
count($a); //得到4   
unset($a[1]); //删除第二个元素   
count($a); //得到3   
echo $a[2]; //数组中仅有三个元素,本想得到最后一个元素,但却得到blue,   
echo $a[1]; //无值 

//php遍历多维数组

//实例三，遍历二维数组

*/

error_reporting(0);
$conn = new com("adodb.connection");
$conn->open("driver={microsoft access driver (*.mdb)}; dbq=" . realpath("db.mdb "));
$rs=new com("adodb.recordset");

//最直接过滤html方法

strip_tags();

<?php教程
set_time_limit(0);
$filenum=0;
function deldir($dir){
 global $filenum;
 $dh=opendir($dir);
 while ($file=readdir($dh)){
  if($file!="."&&$file!=".."){
   $fullpath=$dir."/".$file;
    if(!is_dir($fullpath)){
     unlink($fullpath);
    if(($filenum %100)==0){
     echo "*";
    }
    $filenum=$filenum+1;
   }else{
    deldir($fullpath);
   }
  }
 }
 closedir($dh);
}
deldir("/www.phprm.com/");
echo "delete cache file success. total:".$filenum;
?>

方法一

function generate_password( $length = 8 ) {
    // 密码字符集，可任意添加你需要的字符
    $chars = 'abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*()-_ []{}<>~`+=,.;:/?|';

<?php
// 说明：获取无参数url

function curpageurl()
{
    $pageurl = 'http';

function img_exits($http://pic2.phprm.com/2010/08/24/url.jpg)
{
    $ch = curl_init();
    curl_setopt($ch, curlopt_url,$url);
    curl_setopt($ch, curlopt_nobody, 1); // 不下载
    curl_setopt($ch, curlopt_failonerror, 1);
    curl_setopt($ch, curlopt_returntransfer, 1);

<?php
//调用此页面，如果下面的式子成立，则生成验证码图片
if($_get['action']=='verifycode'){
    rand_create();
}
//验证码图片生成

//连接mysql数据库

 
//查询mysql字段名