PHP tutorial. Application example 7_PHP tutorial

PHP implements safe file download
The procedure is as follows:
　＄file_name = "info_check.exe";
　＄file_dir = "/public/www/download/";
　if (!file_exists(＄file_dir . ＄file_name)) { //Check whether the file exists
echo "File not found";
exit;
} else {
＄file = fopen(＄file_dir . ＄file_name,"r" ); //Open the file
// Enter the file tag
Header("Content-type: application/octet-stream"); ​​
Header("Accept-Ranges: bytes");
Header ("Accept-Length: ".filesize(＄file_dir . ＄file_name));
Header("Content-Disposition: attachment; filename=" . ＄file_name);
//Output file content
echo fread(＄file,filesize(＄file_dir . ＄file_name));
fclose(＄file);
exit;}
And if the file path is an "http" or "ftp" URL, the source The code will change slightly, the procedure is as follows:
　＄file_name = "info_check.exe";
　＄file_dir = "www.easycn.net/";
　＄file = @ fopen(＄file_dir . ＄file_name ,"r");

if (!＄file) {
echo "File not found";
} else {
Header("Content-type: application/octet- stream"); ​​
Header("Content-Disposition: attachment; filename=" . ＄file_name);
while (!feof (＄file)) {
echo fread(＄file,50000);
　}
　fclose (＄file);
　}
　This way you can use PHP to directly output the file

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