Php + ajax: how to automatically save code instances _ PHP Tutorial

The php + ajax document automatically saves the code instance method. The php + ajax document automatically saves the code instance method. The main purpose is to facilitate users and improve user experience. We use ajax to save a temporary data, just like csdn, he can automatically save php + ajax articles and automatically save code instances. the main method is to facilitate users and improve user experience. We use ajax to save a temporary data, just like csdn, it can automatically save user data, which means the power is down. in the event of an accident, no one will lose the edited data.

This is a core part of automatically saving drafts,
Autosavetime (sec) is used to start timing.
ClearTimeout (autosavetimer); clears the timer
Document. getElementById ('autosavetimebox'). innerHTML = sec + "seconds"; get the autosavetimebox object on the page, and write a countdown to it

If (sec> 0 ){
Autosavetimer = setTimeout ("autosavetime (" + sec + "-1)", 1000 );
// Here is if when the sec> 0, the first second executes the autosavetime function, and will write the value of the sec-1 into the autosavetimebox
} Else {
Var title = document. getElementById ('title ');
If (title. value! = ''){
Autosave_post ();
} Else {
Document. getElementById ('autosavetimebox'). innerHTML = 'do not save ';
}
This part means that when the sec> 0 condition is not true, the sec starts to save the draft.
First, the system will judge whether the title of the article is null. if it is not empty, execute the autosave_post () function. Otherwise, the system will write 'Do not save'
}
Php Tutorial code

Var userAgent = navigator. userAgent. toLowerCase ();
Var is_opera = (userAgent. indexOf ('Opera ')! =-1 );
Var is_saf = (userAgent. indexOf ('applewebkit ')! =-1) | (navigator. vendor = 'Apple Computer, Inc .'));
Var is_webtv = (userAgent. indexOf ('webtv ')! =-1 );
Var is_ie = (userAgent. indexOf ('msie ')! =-1 )&&(! Is_opera )&&(! Is_saf )&&(! Is_webtv ));
Var is_ie4 = (is_ie) & (userAgent. indexOf ('msie 4 .')! =-1 ));
Var is_moz = (navigator. product = 'Gecko ')&&(! Is_saf ));
Var is_kon = (userAgent. indexOf ('konqueror ')! =-1 );
Var is_ns = (userAgent. indexOf ('compute') =-1) & (userAgent. indexOf ('mozilla ')! =-1 )&&(! Is_opera )&&(! Is_webtv )&&(! Is_saf ));
Var is_ns4 = (is_ns) & (parseInt (navigator. appVersion) = 4 ));
Var is_mac = (userAgent. indexOf ('Mac ')! =-1 );
If (is_ie &! Is_ie4) | is_moz | is_saf | is_opera)
{
Var allowajax = 1;
} Else {
Var allowajax = 0;
}
Var xmlHttp = false;
Function makeSendData (postData, url, functionName, httptype ){

Var posturl = url;
Try {
XmlHttp = new ActiveXObject ("Msxml2.XMLHTTP ");
} Catch (e ){
Try {
XmlHttp = new ActiveXObject ("Microsoft. XMLHTTP ");
} Catch (e2 ){
XmlHttp = false;
}
}
If (! XmlHttp & typeof XMLHttpRequest! = 'Undefined '){
XmlHttp = new XMLHttpRequest ();
}

If (! XmlHttp ){
Alert ('could not send an XMLHTTP request ');
Return false;
}

// Form submission method
XmlHttp. open (httptype, posturl, true );

// Triggers an event after the form is submitted.
Var changefunc = "xmlHttp. onreadystatechange =" + functionName; // from bob
Eval (changefunc );
XmlHttp. setRequestHeader ('content-type', 'application/x-www-form-urlencoded ');
XmlHttp. send (postData );
}
Function autosave_post ()
{
Var title = document. getElementById ('title'). value;
Var content = window. frames ["Editor"]. window. frames ["HtmlEditor" ..doc ument. getElementsByTagName ("BODY") [0]. innerHTML;
Var postTime = document. getElementById ('posttime'). value;
If (allowajax = 1)
{
Content = postencode (content );
Title = postencode (title );
Var post = "title =" + title + "& content =" + content + "& postTime =" + postTime + "";
Var url = "ajax. php? Act = autosave ";
MakeSendData (post, url, 'autosave', 'post ');
}
}
Function autosave ()
{
If (xmlHttp. readyState = 4)
{
If (xmlHttp. status = 200)
{
Var autoresponse = xmlHttp. responseText;
Var automessage = document. getElementById ('autosavetimebox ');
If (autoresponse. indexOf ("")! =-1)
{
Automessage. innerHTML = 'You have not added the information, do not save the draft ';
Return false;
}
If (autoresponse. indexOf ("")! =-1)
{
Automessage. innerHTML = 'saved successfully. you can load the draft in case of an accident ';
Finddraft ();
}
}
}
}
Function finddraft ()
{
If (allowajax = 1)
{
Var url = "ajax. php? Act = loaddraft ";
MakeSendData (null, url, 'loaddraft ', 'post ');
}
}
Function loaddraft ()
{
Var draftbox = document. getElementById ('Draft ');
If (xmlHttp. readyState <4)
{
Draftbox. innerHTML = 'load the draft ...';
}
If (xmlHttp. readyState = 4)
{
If (xmlHttp. status = 200)
{
Draftbox. innerHTML = xmlHttp. responseText;
}
}
}
Function cleardraft ()
{
If (allowajax = 1)
{
Var url = "ajax. php? Act = cleardraft ";
MakeSendData (null, url, 'nodraft ', 'post ');
}
}
Function nodraft ()
{
Var draftbox = document. getElementById ('Draft ');
If (xmlHttp. readyState <4)
{
Draftbox. innerHTML = 'Loading ...';
}
If (xmlHttp. readyState = 4)
{
If (xmlHttp. status = 200)
{
Draftbox. innerHTML = xmlHttp. responseText;
}
}
}
// Encode string
Function postencode (str ){
Str = encodeURIComponent (str );
If (is_moz) str = str. replace (/% 0A/g, "% 0D % 0A"); // from bob
Return str;
}

Automatically saved js code

Var autosavetimer;
Function autosavetime (sec ){
ClearTimeout (autosavetimer );
Document. getElementById ('autosavetimebox'). innerHTML = sec + "seconds ";
If (sec> 0 ){
Autosavetimer = setTimeout ("autosavetime (" + sec + "-1)", 1000 );
} Else {
Var blogtitle = document. getElementById ('title ');
If (blogtitle. value! = ''){
Autosave_post ();
} Else {
Document. getElementById ('autosavetimebox'). innerHTML = 'do not save ';
}
}
}
Function startimer ()
{
Var starttime = document. getElementById ('autosavetimebox'). innerHTML;
If (starttime = 'saved successfully, you can load the draft when an accident occurs' | starttime = 'you have not added the information, do not save the draft ')
{
Starttime = '60 ';
} Else {
Starttime = starttime. replace ('second ','');
}
Var autosavefunbox = document. getElementById ('autosavefunbox ');
Autosavefunbox. innerHTML = 'stopped ';
Starttime = 0? Starttime = 60: starttime = starttime;
Autosavetime (starttime );
}
Function stoptimer ()
{
Var autosavefunbox = document. getElementById ('autosavefunbox ');
Autosavefunbox. innerHTML = 'start time ';
ClearTimeout (autosavetimer );
}

The php + ajax document automatically saves the code instance method. The main purpose is to facilitate users and improve user experience. We use ajax to save a temporary data, just like csdn, it can automatically save user data, which means the power is down. in the event of an accident, no one will lose the edited data.

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