SplFileObject::ftruncate

(PHP 5 >= 5.1.0, PHP 7)

SplFileObject::ftruncate — Truncates the file to a given length

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public SplFileObject::ftruncate ( int $size ) : bool

Truncates the file to size bytes.

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size

The size to truncate to.

Note:

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.

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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();
?>

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