Hướng dẫn how to get file size using php? - Làm thế nào để có được kích thước tệp bằng php?

(Php 4, Php 5, Php 7, Php 8)

Tệp - Nhận kích thước tệp — Gets file size

Sự mô tả

Tệp (Chuỗi $filename): Int | Sai(string $filename): int|false

Thông số

Đường dẫn đến tệp.

Trả về giá trị

Trả về kích thước của tệp tính bằng byte hoặc false (và tạo lỗi cấp độ E_WARNING) trong trường hợp lỗi.false (and generates an error of level E_WARNING) in case of an error.

Lưu ý: Vì loại số nguyên của PHP được ký kết và nhiều nền tảng sử dụng số nguyên 32 bit, một số hàm hệ thống tập tin có thể trả về kết quả bất ngờ cho các tệp lớn hơn 2GB.: Because PHP's integer type is signed and many platforms use 32bit integers, some filesystem functions may return unexpected results for files which are larger than 2GB.

Errors/Exceptions

Khi thất bại, một E_WARNING được phát ra.E_WARNING is emitted.

Ví dụ

Ví dụ #1 Tệp () Ví dụfilesize() example

// outputs e.g.  somefile.txt: 1024 bytes$filename = 'somefile.txt';
echo $filename . ': ' . filesize($filename) . ' bytes';?>

Ghi chú

Lưu ý: Kết quả của chức năng này được lưu trong bộ nhớ cache. Xem ClearStatCache () để biết thêm chi tiết.: The results of this function are cached. See clearstatcache() for more details.

Xem thêm

• file_exists () - Kiểm tra xem tệp hoặc thư mục có tồn tại không

Rommel tại Rommelsantor Dot Com ¶ ¶

10 năm trước

Extremely simple function to get human filesize.
function human_filesize($bytes, $decimals = 2) {
  $sz = 'BKMGTP';
  $factor = floor((strlen($bytes) - 1) / 3);
  return sprintf("%.{$decimals}f", $bytes / pow(1024, $factor)) . @$sz[$factor];
}
?>

Ẩn danh ¶ ¶

11 năm trước

if you recently appended something to file, and closed it then this method will not show appended data:
// get contents of a file into a string
$filename = "/usr/local/something.txt";
$handle = fopen($filename, "r");
$contents = fread($handle, filesize($filename));
fclose($handle);
?>
You should insert a call to clearstatcache() before calling filesize()
I've spent two hours to find that =/

ivijan dot stefan tại gmail dot com ¶ ¶

5 năm trước

This function also can be great for browser caching controll. For example, you have a stylesheet and you want to make sure everyone has the most recent version. You could rename it every time you edit it, but that would be a waste of time. Instead, you can do like:

echo '';?>

Sample output:

filename0

filename1

Arseny Mogilev ¶

9 năm trước

filename3

filename4

Damien Dussouillez ¶ ¶

5 năm trước

filename6

filename7

Arseny Mogilev ¶

5 năm trước

filename9

Arseny Mogilev ¶

9 năm trước

false0

false1

false2

Damien Dussouillez ¶ ¶

synnus tại gmail dot com

false4

false5

Arseny Mogilev ¶

synnus tại gmail dot com

false7

false8

Ẩn danh ¶ ¶

9 năm trước

E_WARNING0

E_WARNING1

synnus tại gmail dot com ¶

John Crocker ¶

E_WARNING3

E_WARNING4

3 năm trước ¶

5 năm trước

E_WARNING6

Arseny Mogilev ¶

5 năm trước

E_WARNING7

E_WARNING8

E_WARNING9

Arseny Mogilev ¶

9 năm trước

E_WARNING1

Damien Dussouillez ¶ ¶

11 năm trước

E_WARNING2

E_WARNING3

E_WARNING4

Arseny Mogilev ¶

synnus tại gmail dot com

E_WARNING6

E_WARNING7

E_WARNING8

John Crocker ¶ ¶

3 năm trước

// outputs e.g.  somefile.txt: 1024 bytes$filename = 'somefile.txt';
echo $filename . ': ' . filesize($filename) . ' bytes';?> 0

// outputs e.g.  somefile.txt: 1024 bytes$filename = 'somefile.txt';
echo $filename . ': ' . filesize($filename) . ' bytes';?> 1

C0NW0NK ¶ ¶

9 năm trước

// outputs e.g.  somefile.txt: 1024 bytes$filename = 'somefile.txt';
echo $filename . ': ' . filesize($filename) . ' bytes';?> 3

// outputs e.g.  somefile.txt: 1024 bytes$filename = 'somefile.txt';
echo $filename . ': ' . filesize($filename) . ' bytes';?> 4

// outputs e.g.  somefile.txt: 1024 bytes$filename = 'somefile.txt';
echo $filename . ': ' . filesize($filename) . ' bytes';?> 5

// outputs e.g.  somefile.txt: 1024 bytes$filename = 'somefile.txt';
echo $filename . ': ' . filesize($filename) . ' bytes';?> 6

// outputs e.g.  somefile.txt: 1024 bytes$filename = 'somefile.txt';
echo $filename . ': ' . filesize($filename) . ' bytes';?> 7

// outputs e.g.  somefile.txt: 1024 bytes$filename = 'somefile.txt';
echo $filename . ': ' . filesize($filename) . ' bytes';?> 8

// outputs e.g.  somefile.txt: 1024 bytes$filename = 'somefile.txt';
echo $filename . ': ' . filesize($filename) . ' bytes';?> 9

Extremely simple function to get human filesize.
function human_filesize($bytes, $decimals = 2) {
  $sz = 'BKMGTP';
  $factor = floor((strlen($bytes) - 1) / 3);
  return sprintf("%.{$decimals}f", $bytes / pow(1024, $factor)) . @$sz[$factor];
}
?> 0

Damien Dussouillez ¶ ¶

synnus tại gmail dot com

Extremely simple function to get human filesize.
function human_filesize($bytes, $decimals = 2) {
  $sz = 'BKMGTP';
  $factor = floor((strlen($bytes) - 1) / 3);
  return sprintf("%.{$decimals}f", $bytes / pow(1024, $factor)) . @$sz[$factor];
}
?> 2

Extremely simple function to get human filesize.
function human_filesize($bytes, $decimals = 2) {
  $sz = 'BKMGTP';
  $factor = floor((strlen($bytes) - 1) / 3);
  return sprintf("%.{$decimals}f", $bytes / pow(1024, $factor)) . @$sz[$factor];
}
?> 3

Extremely simple function to get human filesize.
function human_filesize($bytes, $decimals = 2) {
  $sz = 'BKMGTP';
  $factor = floor((strlen($bytes) - 1) / 3);
  return sprintf("%.{$decimals}f", $bytes / pow(1024, $factor)) . @$sz[$factor];
}
?> 4

John Crocker ¶ ¶

3 năm trước

Extremely simple function to get human filesize.
function human_filesize($bytes, $decimals = 2) {
  $sz = 'BKMGTP';
  $factor = floor((strlen($bytes) - 1) / 3);
  return sprintf("%.{$decimals}f", $bytes / pow(1024, $factor)) . @$sz[$factor];
}
?> 6

Extremely simple function to get human filesize.
function human_filesize($bytes, $decimals = 2) {
  $sz = 'BKMGTP';
  $factor = floor((strlen($bytes) - 1) / 3);
  return sprintf("%.{$decimals}f", $bytes / pow(1024, $factor)) . @$sz[$factor];
}
?> 7

C0NW0NK ¶ ¶

3 năm trước

Extremely simple function to get human filesize.
function human_filesize($bytes, $decimals = 2) {
  $sz = 'BKMGTP';
  $factor = floor((strlen($bytes) - 1) / 3);
  return sprintf("%.{$decimals}f", $bytes / pow(1024, $factor)) . @$sz[$factor];
}
?> 9

if you recently appended something to file, and closed it then this method will not show appended data:
// get contents of a file into a string
$filename = "/usr/local/something.txt";
$handle = fopen($filename, "r");
$contents = fread($handle, filesize($filename));
fclose($handle);
?>
You should insert a call to clearstatcache() before calling filesize()
I've spent two hours to find that =/ 0

Ẩn danh ¶ ¶

11 năm trước

if you recently appended something to file, and closed it then this method will not show appended data:
// get contents of a file into a string
$filename = "/usr/local/something.txt";
$handle = fopen($filename, "r");
$contents = fread($handle, filesize($filename));
fclose($handle);
?>
You should insert a call to clearstatcache() before calling filesize()
I've spent two hours to find that =/ 2

if you recently appended something to file, and closed it then this method will not show appended data:
// get contents of a file into a string
$filename = "/usr/local/something.txt";
$handle = fopen($filename, "r");
$contents = fread($handle, filesize($filename));
fclose($handle);
?>
You should insert a call to clearstatcache() before calling filesize()
I've spent two hours to find that =/ 3

if you recently appended something to file, and closed it then this method will not show appended data:
// get contents of a file into a string
$filename = "/usr/local/something.txt";
$handle = fopen($filename, "r");
$contents = fread($handle, filesize($filename));
fclose($handle);
?>
You should insert a call to clearstatcache() before calling filesize()
I've spent two hours to find that =/ 4

Arseny Mogilev ¶

synnus tại gmail dot com

if you recently appended something to file, and closed it then this method will not show appended data:
// get contents of a file into a string
$filename = "/usr/local/something.txt";
$handle = fopen($filename, "r");
$contents = fread($handle, filesize($filename));
fclose($handle);
?>
You should insert a call to clearstatcache() before calling filesize()
I've spent two hours to find that =/ 6

if you recently appended something to file, and closed it then this method will not show appended data:
// get contents of a file into a string
$filename = "/usr/local/something.txt";
$handle = fopen($filename, "r");
$contents = fread($handle, filesize($filename));
fclose($handle);
?>
You should insert a call to clearstatcache() before calling filesize()
I've spent two hours to find that =/ 7

John Crocker ¶ ¶

3 năm trước

if you recently appended something to file, and closed it then this method will not show appended data:
// get contents of a file into a string
$filename = "/usr/local/something.txt";
$handle = fopen($filename, "r");
$contents = fread($handle, filesize($filename));
fclose($handle);
?>
You should insert a call to clearstatcache() before calling filesize()
I've spent two hours to find that =/ 9

This function also can be great for browser caching controll. For example, you have a stylesheet and you want to make sure everyone has the most recent version. You could rename it every time you edit it, but that would be a waste of time. Instead, you can do like: 0

C0NW0NK ¶ ¶

synnus tại gmail dot com

This function also can be great for browser caching controll. For example, you have a stylesheet and you want to make sure everyone has the most recent version. You could rename it every time you edit it, but that would be a waste of time. Instead, you can do like: 2

This function also can be great for browser caching controll. For example, you have a stylesheet and you want to make sure everyone has the most recent version. You could rename it every time you edit it, but that would be a waste of time. Instead, you can do like: 3

This function also can be great for browser caching controll. For example, you have a stylesheet and you want to make sure everyone has the most recent version. You could rename it every time you edit it, but that would be a waste of time. Instead, you can do like: 4

Arseny Mogilev ¶

5 năm trước

This function also can be great for browser caching controll. For example, you have a stylesheet and you want to make sure everyone has the most recent version. You could rename it every time you edit it, but that would be a waste of time. Instead, you can do like: 6

Arseny Mogilev ¶

John Crocker ¶

This function also can be great for browser caching controll. For example, you have a stylesheet and you want to make sure everyone has the most recent version. You could rename it every time you edit it, but that would be a waste of time. Instead, you can do like: 7

This function also can be great for browser caching controll. For example, you have a stylesheet and you want to make sure everyone has the most recent version. You could rename it every time you edit it, but that would be a waste of time. Instead, you can do like: 8

3 năm trước ¶

C0NW0NK ¶

echo '';?>

Sample output: 0

echo '';?>

Sample output: 1

echo '';?>

Sample output: 2

echo '';?>

Sample output: 3

echo '';?>

Sample output: 4

6 năm trước ¶

filename2

echo '';?>

Sample output: 6

echo '';?>

Sample output: 7

Chắc chắn ¶ ¶

9 năm trước

echo '';?>

Sample output: 9

filename00

filename01

Damien Dussouillez ¶ ¶

synnus tại gmail dot com

filename03

filename04

John Crocker ¶ ¶

5 năm trước

filename06

filename07

Arseny Mogilev ¶

5 năm trước

filename09