AJAXPHP does not need to upload the image instance code. In the past, we used to upload files through ajax + php. This allows users to dynamically Upload images without refreshing new pages, improving the user experience, at that time, iframe was used most frequently to perform operations. Previously, we used ajax + php to upload files. This allows users to dynamically Upload images without refreshing new pages, improving user experience, at that time, iframe was used most frequently. next I will introduce the real ajax php image Upload instance.
I have been studying the no-refreshing verification of ajax + php forms, mainly for registration and submission forms. the use of ajax technology has greatly increased visitor friendliness to webpages, ajax is essential to improve page friendliness.
Of course, ajax is not only a form without refreshing verification, but also can be better applied to other places on the page. ajax technology is basically available in all areas where the form is refreshing, today we are talking about ajax + php refreshing image uploads.
The technology of refreshing images is often used to upload attachments or images, such as uploading attachments in common QQ mailboxes, uploading attachments in 163 mailboxes, and uploading images in QQ spaces, this type of data is based on the ajax refresh technology, which allows us to see uploaded attachments on the current page. in the background of a general small site, when uploading a product, the uploaded product images are often invisible, which often fails to achieve good results.
The following is the source code of a new image upload without refreshing ajax + php. this is just an example, and modifying this instance can be well applied on the webpage, add a refreshing image Upload effect to your page. you can search for it online.
File. php file
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Untitled Document
$ Sort = 12;
$ F_type = strtolower ("swf, jpg, rar, zip, 7z, iso, gif"); // you can specify the file type that can be uploaded.
$ File_size_max = 200*1024*1024; // limit the maximum upload capacity of a single file
$ Overwrite = 0; // specifies whether to overwrite the same file. values: 1 (allowed) and 0 (not allowed ).
$ F_input = "Files"; // Set the name of the uploaded domain name
Foreach ($ _ FILES [$ f_input] ["error"] as $ key => $ error ){
$ Up_error = "no ";
If ($ error = UPLOAD_ERR_ OK ){
$ F_name = $ _ FILES [$ f_input] ['name'] [$ key]; // Obtain the name of the uploaded source file
$ Uploadfile = $ uploaddir. strtolower (basename ($ f_name ));
$ Tmp_type = substr (strrchr ($ f_name, "."), 1); // get the file extension
$ Tmp_type = strtolower ($ tmp_type );
If (! Stristr ($ f_type, $ tmp_type )){
Echo "script" alert ('sorry, you cannot upload ". $ tmp_type." format file, ". $ f_name." file Upload failed! ') Script ";
$ Up_error = "yes ";
}
If ($ _ FILES [$ f_input] ['size'] [$ key]> $ file_size_max ){
Echo "script" alert ('sorry, the file you uploaded ". $ f_name." capacity is ". round ($ _ FILES [$ f_input]
['Size'] [$ key]/1024). "Kb, greater than the specified". ($ file_size_max/1024). "Kb, upload failed! ') Script ";
$ Up_error = "yes ";
}
If (file_exists ($ uploadfile )&&! $ Overwrite ){
Echo "script" alert ('sorry, File ". $ f_name." already exists. Upload failed! ') Script ";
$ Up_error = "yes ";
}
$ String = 'abcdefghijklmnopgrstuvwxyz0123456789 ';
$ Rand = '';
For ($ x = 0; $ x <12; $ x ++)
$ Rand. = substr ($ string, mt_rand (0, strlen ($ string)-1), 1 );
$ T = date ("ymdHis"). substr ($ gettime [0], 2, 6). $ rand;
$ Attdir = "./file /";
If (! Is_dir ($ attdir ))
{Mkdir ($ attdir );}
$ Uploadfile = $ attdir. $ t. ".". $ tmp_type;
If ($ up_error! = "Yes") and (move_uploaded_file ($ _ FILES [$ f_input] ['tmp _ name']
[$ Key], $ uploadfile ))){
$ _ Msg = $ _ msg. $ f_name. 'upload successful n ';
}
Else {
$ _ Msg = $ _ msg. $ f_name. 'upload failed n ';
}
}
}
Echo "script window. parent. Finish ('". $ _ msg. "'); script";
?>
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Fileupload.htm page
| The code is as follows: |
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Brushless newest file upload system
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