SplFileObject::ftruncate
PHP function
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(PHP 5 >= 5.1.0, PHP 7, PHP 8)
Truncates the file to a given length
Description
SplFileObject::ftruncate(int $size): bool
Truncates the file to size bytes.
Parameters
sizeThe size to truncate to.
NoteIf
sizeis larger than the file it is extended with null bytes.If
sizeis smaller than the file, the extra data will be lost.
Return Values
Success
Examples
SplFileObject::ftruncate example
php
<?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:
output
Hello