felayman--php picture upload to server _php tutorial

1.upload_file.php

This file is responsible for getting the uploaded image extension and randomly generated file name

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

/**

* Get file name extension

*enter description here ...

* @param unknown_type $filename

*/

function GetFileName ($filename) {

Strrchr-finds the last occurrence of a specified character in a string

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

}

/**

* Random generation of n-bit strings

* Enterdescription here ...

* @param unknown_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");

Introduces the function lib that gets the name of the uploaded file that has generated the filename

Require ' upload_file.php ';

Set the directory to save the file

$upload _dir = "files/";

if (!file_exists ($upload _dir)) {

mkdir ($upload _dir);

}

Set up file types to run uploads

$type =array (' jpg ', ' png ', ' gif ', ' jpeg ');

in_array-checks if a value exists in the array

if (!in_array (Strtolower (GetFileName ($_files[' file ' [' name '])), $type)) {

Implode, union the array into a string

$text = Implode (', ', $type);

echo "";

}else{

Get file name

$filename = Explode ('. ', $_files[' file ' [' name ']);

$filename [0] =rand_str (10);

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

http://blog.csdn.net/u012332735/article/details/$uploadfile = $upload _dir. $name;

is_uploaded_file-to determine if the file was uploaded via HTTP post

if (is_uploaded_file ($_files[' file ' [' Tmp_name '])) {

Move_uploaded_file-moving uploaded files to a new location

if (move_uploaded_file ($_files[' file '] [' tmp_name '],http://blog.csdn.net/u012332735/article/details/$uploadfile) ){

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

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

echo "
";

echo "Continue uploading";

}else{

echo "Upload failed";

}

}

}

?>

http://www.bkjia.com/PHPjc/815137.html www.bkjia.com true http://www.bkjia.com/PHPjc/815137.html techarticle 1.upload_file.php//The file is responsible for obtaining the uploaded image extension and randomly generated filename header ("Content-type:text/html;charset=utf-8");/** * Get File extension * Enter desc ...

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