(PHP 5 >= 5.1.0, PHP 7)
SplFileObject::ftruncate — Truncates the file to a given length
public SplFileObject::ftruncate ( int $size ) : bool
Truncates the file to size bytes.
size
The size to truncate to.
Note:
If
sizeis larger than the file it is extended with null bytes.If
sizeis smaller than the file, the extra data will be lost.
Returns true on success or false on failure.
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();
?> The above example will output something similar to:
Hello
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https://www.php.net/manual/en/splfileobject.ftruncate.php