1--TEST--
2Test filesize() function: usage variations - file size after truncate
3--FILE--
4<?php
5$file_path = __DIR__;
6
7echo "*** Testing filesize(): usage variations ***\n";
8$filename =  $file_path."/filesize_variation3.tmp";
9$file_handle = fopen($filename, "w");
10fwrite($file_handle, str_repeat("Hello,World ", 1000) ); // create file of size 12000 bytes
11fclose($file_handle);
12
13echo "-- Testing filesize() after truncating the file to a new length --\n";
14// truncate the file created earlier in subdir, the size of the file is 12000bytes
15// truncate the same file, in the loop , each time with the decrement in size by 1200 bytes,
16//  until -1200bytes size
17for($size = filesize($filename); $size>=-1200; $size-=1200) {
18    $file_handle = fopen($filename, "r+");
19    try {
20        var_dump( ftruncate($file_handle, $size) );
21    } catch (\ValueError $e) {
22        echo $e->getMessage() . \PHP_EOL;
23    }
24    fclose($file_handle);
25    var_dump( filesize($filename) );
26    clearstatcache();
27}
28
29?>
30--CLEAN--
31<?php
32$file_path = __DIR__;
33unlink($file_path."/filesize_variation3.tmp");
34?>
35--EXPECT--
36*** Testing filesize(): usage variations ***
37-- Testing filesize() after truncating the file to a new length --
38bool(true)
39int(12000)
40bool(true)
41int(10800)
42bool(true)
43int(9600)
44bool(true)
45int(8400)
46bool(true)
47int(7200)
48bool(true)
49int(6000)
50bool(true)
51int(4800)
52bool(true)
53int(3600)
54bool(true)
55int(2400)
56bool(true)
57int(1200)
58bool(true)
59int(0)
60ftruncate(): Argument #2 ($size) must be greater than or equal to 0
61int(0)
62