SplFileObject::ftellSplFileObject::ftruncate
(PHP 5 >= 5.1.0)
SplFileObject::ftruncate — Truncates the file to a given length
Описание
public bool SplFileObject::ftruncate
( int $size
)
Truncates the file to size bytes.
Параметри
- size
-
The size to truncate to.
Забележка: If size is larger than the file it is extended with null bytes.
If size is smaller than the file, the extra data will be lost.
Връщани стойности
Връща TRUE при успех или FALSE при неуспех.
Примери
Example #1 SplFileObject::ftruncate example
<?php
// Create file containing "Hello World!"
$file = new SplFileObject("/tmp/ftruncate", "w+");
$file->fwrite("Hello World!");
// Truncate to 5 bytes
$file->ftruncate(5);
// Rewind and read data
$file->rewind();
echo $file->fgets();
?>
Примерът по-горе ще изведе нещо подобно на:
Hello
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SplFileObject::ftruncate
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