felayman——Upload pictures to the server in PHP_PHP tutorial

1.upload_file.php

//This 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 file extension

*Enter description here ...

* @param unknown_type $filename

*/

function getFileName($filename){

//strrchr—Find the last occurrence of the specified character in the string

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

}

/**

* Randomly generate n-digit string

* 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

$s.=$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

require 'upload_file.php';

//Set the directory where the file is to be saved

$upload_dir = "files/";

if(!file_exists($upload_dir)){

mkdir($upload_dir);

}

//Set the file type to be uploaded

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

//in_array — Check if a value exists in the array

if(!in_array(strtolower(getFileName($_FILES['file']['name'])), $type)){

//implode, combine arrays into a string

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

echo "<script>alert('The file type is only allowed to be {$text}');window.location='index.html';</script>";

}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 — Determine whether the file was uploaded via HTTP POST

if(is_uploaded_file($_FILES['file']['tmp_name'])){

//move_uploaded_file — Move the uploaded file 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 "

echo "
";

echo "Continue uploading";

}else{

echo "Upload failed";

}

}

}