php create file with given size

How can i create in PHP a file with a given size (no matter the content)?

I have to create a file bigger than 1GB. Arround 4-10GB maximum

Answer

You can make use of fopen and fseek

define('SIZE',100); // size of the file to be created.
$fp = fopen('somefile.txt', 'w'); // open in write mode.
fseek($fp, SIZE-1,SEEK_CUR); // seek to SIZE-1
fwrite($fp,'a'); // write a dummy char at SIZE position
fclose($fp); // close the file.

JavaScript
​x
 
define('SIZE',100); // size of the file to be created.$fp = fopen('somefile.txt', 'w'); // open in write mode.fseek($fp, SIZE-1,SEEK_CUR); // seek to SIZE-1fwrite($fp,'a'); // write a dummy char at SIZE positionfclose($fp); // close the file.​

On execution:

$ php a.php

$ wc somefile.txt
  0   1 100 somefile.txt
$

JavaScript
 
$ php a.php​$ wc somefile.txt  0   1 100 somefile.txt$ ​

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Answer