Felayman -- PHP Tutorial on uploading images to server _ PHP

Felayman -- uploads images from PHP to the server. 1. upload_file.php this file is responsible for obtaining the extension of the uploaded image and the randomly generated file name header (content-type: texthtml; charsetutf-8); *** get file extension * Enterdesc 1. upload_file.php

// Obtain the extension of the uploaded image and the randomly generated file name.

Header ("content-type: text/html; charset = utf-8 ");

/**

* Get the file extension

* Enter description here...

*@ ParamUnknown_type $ filename

*/

Function getFileName ($ filename ){

// Strrchr-find the last occurrence of a specified character in the string

Return substr (strrchr ($ filename, '.'), 1 );

}

/**

* Random generation of n-bit strings

* Enterdescription here...

*@ ParamUnknown_type $ num

*/

Function rand_str ($ num ){

$ Str = "qwertyuioplkjhgfdsazxcvbnmQAZWSXEDCRFVTGBYHNUJMIKOLP1234567890 ";

$ Str_len = strlen ($ str)-1;

// Echo $ str_len;

$ S = '';

For ($ I = 0; $ I <$ num; $ I ++ ){

$ S. = $ str [rand (0, $ str_len)];

}

Echo $ s;

}

?>

2.index.html

3. deal_upload.php

Header ("content-type: text/html; charset = utf-8 ");

// Introduce the function lib for obtaining the name of the uploaded file that has generated the file name

Require 'upload _ file. php ';

// Set the directory to save the file

$ Upload_dir = "files /";

If (! File_exists ($ upload_dir )){

Mkdir ($ upload_dir );

}

// Set the file type for running Upload

$ Type = array ('jpg ', 'PNG', 'GIF', 'jpeg ');

// In_array-check whether a value exists in the array

If (! In_array (strtolower (getFileName ($ _ FILES ['file'] ['name']), $ type )){

// Implode, which combines the array into a string

$ Text = implode (',', $ type );

Echo "scriptpolicalert('file names are only allowed when text='{}}location='index.html '; script";

} Else {

// Obtain the file name

$ Filename = explode ('.', $ _ FILES ['file'] ['name']);

$ Filename [0] = rand_str (10 );

$ Name = implode ('.', $ filename );

Bytes;

// Is_uploaded_file-determines whether the file is uploaded through http post.

If (is_uploaded_file ($ _ FILES ['file'] ['tmp _ name']) {

// Move_uploaded_file-move the uploaded file to the new location

If (move_uploaded_file ($ _ FILES ['file'] ['tmp _ name'], http://blog.csdn.net/u012332735/article/details/javasuploadfile )){

$ File_path = getcwd (). '\'. http://blog.csdn.net/u012332735/article/details/$uploadfile; echo"

After uploading your file, upload the image to preview it: ";

Echo"
";

Echo "continue Upload ";

} Else {

Echo "Upload failed ";

}

}

}

?>

Http://www.bkjia.com/PHPjc/815137.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/815137.htmlTechArticle1.upload_file.php // The file is responsible for obtaining the extension of the uploaded image and randomly generating the file name header ("content-type: text/html; charset = utf-8 "); /*** get the file extension * Enter desc...