The SplFileObject::ftruncate() function is an inbuilt function of Standard PHP Library (SPL) in PHP which is used to truncates the file size in bytes.
Syntax:
bool SplFileObject::ftruncate( $length )
Parameters: This function accept single parameter $length which specified the length of truncate of the file.
Return values: This function returns True on success or False on failure.
Below Programs illustrate the SplFileObject ftruncate() function in PHP:
Program 1:
<?php // Create a file named "gfg.txt" which // containing data "neveropen" $gfg = new SplFileObject("gfg.txt", "w+"); $gfg->fwrite("neveropen"); // Truncate file $gfg->ftruncate(8); // Rewind and reading data from file $gfg->rewind(); // Print result after truncate echo $gfg->fgets(); ?> |
Output:
Geeksfor
Program 2:
<?php // Create an Array $GFG = array( "dummy.txt", "gfg.txt", "frame.txt" ); // Creating Spl Object foreach ($GFG as &$arr) { $file = new SplFileObject($arr); // Truncate file $file->ftruncate(8); // Rewind and reading data from file $file->rewind(); // Print result after truncate echo $file->fgets(); } ?> |
Output:
Geeksfor Contribu Article
Reference: http://php.net/manual/en/splfileobject.ftruncate.php
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