php How to download files, php file download the correct method

Source: Internet
Author: User
    1. Check if the form is complete ...
    2. if ($form _completed) {
    3. Header ("Location:http://www.myweb.com/download/info_check.exe");
    4. Exit
    5. }
    6. ?>
    7. Or:
    8. Start Download file
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The ID is used here to receive the number of the file to download, and then "Redirect" the way to connect to the actual URL.

For security reasons, do not let users directly copy the URL to download the file, it is recommended to use PHP directly read the actual file and then download.

Code:

    1. $file _name = "Info_check.exe";
    2. $file _dir = "/public/www/download/";
    3. if (!file_exists ($file _dir. $file _name)) {//check if file exists
    4. echo "File not found";
    5. Exit
    6. } else {
    7. $file = fopen ($file _dir. $file _name, "R"); Open File
    8. Input File Label
    9. Header ("Content-type:application/octet-stream");
    10. Header ("Accept-ranges:bytes");
    11. Header ("Accept-length:". FileSize ($file _dir. $file _name));
    12. Header ("content-disposition:attachment; Filename= ". $file _name);
    13. Output file contents
    14. Echo fread ($file, FileSize ($file _dir. $file _name));
    15. Fclose ($file);
    16. Exit;}
    17. ?>
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If the file path is "http" or "FTP" URL, then the source code will change a little, the program is as follows:

    1. $file _name = "Info_check.exe";
    2. $file _dir = "http://www.jincai123.com/";
    3. $file = @ fopen ($file _dir. $file _name, "R");
    4. if (! $file) {
    5. echo "File not found";
    6. } else {
    7. Header ("Content-type:application/octet-stream");
    8. Header ("content-disposition:attachment; Filename= ". $file _name);
    9. while (!feof ($file)) {
    10. Echo fread ($file, 50000);
    11. }
    12. Fclose ($file);
    13. }
    14. ?>
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Using the above code, you can directly output files in PHP.

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