Minecraft mobile version seed code encyclopedia PHP common code encyclopedia is a must for beginners

1. Connect MYSQL database code
$c or die("Cannot connect to database server: ".mysql_error());
mysql_select_db("liuyanben",$connec) or die ("Cannot select database: ". mysql_error());
mysql_query("set names 'gbk'");
?>
2. Read the database and implement loop output
$sql="select * from liuyan order by ly_id desc ";
$c
while($rs=mysql_fetch_array($conn)){
?>
The content of the loop...
}
?>
3. How Implement paging, including two functions and two calls
1) Two functions
//Page function
function genpage(&$sql,$page_size=2)
{
global $prepage,$nextpage,$ pages,$sums; //out param
$page = $_GET["page"];
$eachpage = $page_size;
$pagesql = strstr($sql," from ");
$pagesql = "select count( *) as ids ".$pagesql;
$conn = mysql_query($pagesql) or die(mysql_error());
if($rs = mysql_fetch_array($conn)) $sums = $rs[0];
$pages = ceil(($sums-0.5)/$eachpage)-1;
$pages = $pages>=0?$pages:0;
$prepage = ($page>0)?$page-1:0;
$nextpage = ($page<$pages)?$page+1:$pages;
$startpos = $page*$eachpage;
$sql .=" limit $startpos,$eachpage ";
}
// Display paging
function showpage()
{
global $page,$pages,$prepage,$nextpage,$queryString; //param from genpage function
$shownum =10/2;
$startpage = ($page>=$shownum) ?$page-$shownum:0;
$endpage = ($page+$shownum<=$pages)?$page+$shownum:$pages;
echo "Total".($pages+1)."Page: ";
if($page>0)echo "Homepage";
if($startpage>0)
echo " ... ?";
for($i=$startpage;$i< ;=$endpage;$i++)
{
if($i==$page) echo " [".($i+1)."] ";
else echo " < ;a href=$PHP_SELF?page=$i$queryString>".($i+1)." ";
}
if($endpage<$pages)
echo "< ;a href=$PHP_SELF?page=".($page+$shownum*2)."$queryString>? ... ";
if($page<$pages)
echo "Last page";
}
//Show classified paging
function showpage1()
{
$fenlei=$_GET[ "fenleiid"];
global $page,$pages,$prepage,$nextpage,$queryString; //param from genpage function
$shownum =10/2;
$startpage = ($page>=$shownum)?$ page-$shownum:0;
$endpage = ($page+$shownum<=$pages)?$page+$shownum:$pages;
echo "total".($pages+1)."page: ";
if ($page>0)echo "Homepage";
if($startpage>0)
echo " ... ?";
for($i=$ startpage;$i<=$endpage;$i++)
{
if($i==$page) echo " [".($i+1)."] ";
else echo " ".($i+1)." ";
}
if($endpage<$pages)
echo "? ... ";
if($page<$pages)
echo "last page}
?>
2 ) Two calls
The first
$sql="select * from liuyan order by ly_id desc";
genpage($sql); //Just add this line to the normal code and it will be ok.
$c
while($rs=mysql_fetch_array($conn)){
?>
Second
}
?>
showpage(); //Show page
?>
mysql_close();
?>
4. Server-side includes

5. How to write a record into the database , and then prompt and jump to the page
$ly_title=$_POST["ly_title"];
$ly_c
$ly_time=$_POST["ly_time"];
$ly_author=$_POST["ly_author"] ;
$ly_email=$_POST["ly_email"];
$sql="insert into liuyan(ly_title,ly_content,ly_time,ly_author,ly_email) values('".$ly_title."','".$ly_content." ','".$ly_time."','".$ly_author."','".$ly_email."')";
mysql_query($sql,$connec);
echo("");
?>
6. A dialog box pops up and the page jumps.
echo("");
? >
7. Information viewing page (conditional reading of the database)
1) Conditional reading of the database
$sql="select * from liuyan where ly_id=$_GET[id]";
$c
$rs=mysql_fetch_array($conn);
?>
2) Output a certain field

3) Close the database
mysql_close();
?>
8. Update a certain record in the database and make a prompt jump
$ly_title=$_POST["ly_title"];
$ly_c
$ly_time=$_POST[" ly_time"];
$ly_author=$_POST["ly_author"];
$ly_email=$_POST["ly_email"];
$sql="update liuyan set ly_title='$ly_title',ly_c where ly_id=$_GET[ id]";
mysql_query($sql,$connec);
echo("");
?>
9. How to delete a record in the database
$sql="delete from liuyan where ly_id=$_GET[id]";
mysql_query($sql,$connec);
echo("");
?>
10. How to verify member login
session_start();
$username=$_POST["username"] ;
$password=$_POST["password"];
$sql="select * from admin where username='".$username."' && password='".$password."'";
$result= mysql_query($sql,$connec);
if($row=mysql_fetch_array($result)){
session_register("admin");
$admin=$username;
echo("");}
else
{
echo("
13. In PHP How to call the editor in
1) Place the editor folder in the background management folder.
2) Use the following statements to perform the import operation.


Note: The name of the eWebEditorPHP38 editor folder.
id=content in which content is the name of the hidden field above
14. Loop output (can achieve column splitting)
1) First insert a row and a column of tables
$i=1;
?>
< table> ;?php
if ($i % 2==0) {
echo "";
}
$i++;
}
?>

< /table>
15. Bind data to the drop-down list box (and select it by default when modifying)

$sql="select * from fenleibiao";
$ c
while($rs1=mysql_fetch_array($conn)){
?>
"
if ($rs[ "fenleiid"]==$rs1["fenleiid"]){
echo "selected" ;
}
?>>



}
?>

16. Get character length function
strlen($c)>12
17. Define a character interception function
Usage:
function substrgb($in,$num){
$pos=0;
$out="";
while($c=substr($in,$ pos,1)){
if($c=="n") break;
if(ord($c)>128){
$out.=$c;
$pos++;
$c=substr( $in,$pos,1);
$out.=$c;
}else{
$out.=$c;
}
$pos++;
if($pos>=$num) break;
}
if($out!=$in) $out = $out . "...";
return $out;
}
18. Determine whether it is a number
!is_numeric(qq)
19. Get the current date in PHP technology
$ptime=date("y-m-d");
20. PHP verification program used when user registration
if ($admin=="" or (strlen($admin)>16) or (strlen($admin) <2)) {
echo "";
}
if ($password=="" or strlen($password)>16 or strlen($password)<6) {
echo "";
}
if ($ password=="") {
echo "";
}
}
if ($wt="") {
echo "";
}
if ($da="") {
echo "< SCRIPT language=JavaScript>alert('Question answer cannot be empty');";
echo"this.location.href='vbscript:history.back()';";
}
if ($ qq!="") {
if (!is_numeric($qq)) {
echo "";
}
}
if ($youbian=="" or strlen($youbian)!=6) {
echo "";
}
if ($youbian!="" ) {
if (!is_numeric($youbian)) {
echo "";
}
}
if ($dizhi="") {
echo "";
}
if ($mail=="") {
echo "";
}
if ($textarea=="") {
echo "";
}
if ($textarea=="" or strlen(textarea)>150) {
echo "";
}
24、对输出的内容进行判断，从而输出其它结果
if ($rs["active"]==1) {
echo "激活";
}else{
echo "禁用";
}
?>
25.字符截取函数

26.男女问题或单选带选择的
>男
>女
27.单选不带单选框的

锁定
else{?>
解锁

它的 save页是

$hy_id=$_GET['id'];
$action=$_GET['action'];
if ($action=='yes'){
$sql="update hybiao set hy_zhuangtai='锁定' where hy_id='$id'";
$query=mysql_query($sql,$connec);
echo("");
}
else{
$sql="update hybiao set hy_zhuangtai='正常' where hy_id='$id'";
$query=mysql_query($sql,$connec);
echo("");
}
mysql_close();
?>
28. 如果文字过长,则将过长的部分变成省略号显示

就是比如有一行文字，很长，表格内一行显示不下.

29.
禁止复制，鼠标拖动选取
30.大 中 小 文字的变化

需要指定大小的文字
大 中 小
30.添加到收藏夹和设为首页

32.节日倒计时

33.打开窗口即最大化

34.加入背景音乐
只适用于IE
对Netscape ,IE 都适用
35.滚动

滚动信息

36.防止点击空链接时，页面往往重置到页首端
代码“javascript:void(null)”代替原来的“#”标记
37.不能点右键，不用CTRL+A，不能复制作!





39.如何关闭层

43.后退&关闭窗口
后退：javascript:history.back(1)
关闭：javascript:window.close();
44.如果文字过长,则将过长的部分变成省略号显示

就是比如有一行文字，很长，表格内一行显示不下.

45. Copying is prohibited, drag the mouse to select

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