PHP ftruncate() Function
In this chapter you will learn:
- Definition for PHP ftruncate() Function
- Syntax for PHP ftruncate() Function
- Parameter for PHP ftruncate() Function
- Return for PHP ftruncate() Function
- Example - truncates an open file to the specified length
Definition
The ftruncate() function truncates an open file to the specified length.
Syntax
PHP ftruncate() Function has the following syntax.
ftruncate(file,size)Parameter
| Parameter | Is Required | Description |
|---|---|---|
| file | Required. | Open file to truncate |
| size | Required. | New file size |
Return
PHP ftruncate() Function returns TRUE on success, or FALSE on failure.
Example
Truncates an open file to the specified length
<?php// j av a2 s .c o m
//check filesize
echo filesize("test.txt");
echo "\n";
$file = fopen("test.txt", "a+");
ftruncate($file,100);
fclose($file);
//Clear cache and check filesize again
clearstatcache();
echo filesize("test.txt");
?>
The code above generates the following result.
Next chapter...
What you will learn in the next chapter:
- Definition for PHP fwrite() Function
- Syntax for PHP fwrite() Function
- Parameter for PHP fwrite() Function
- Return for PHP fwrite() Function
- Note on PHP fwrite() Function
- Example - Write to a file
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