PHP | rewind() Function

PHP rewind() Function


Hello dear readers! welcome back to another edition of our tutorial on PHP. In this tutorial guide, we are going to be discussing about the PHP rewind() Function.

The built-in PHP rewind() function rewinds the position of a file pointer to the beginning of the file.

Syntax

Following below is the syntax to use this function -

bool rewind ( resource $handle )


This built-in PHP function sets the file position indicator for a handle to the beginning of the file stream. If we have opened a file in append ("a" or "a+") mode, then any data that we write to a file can always be appended, regardless of the file pointer position.

Return Value

This built-in function returns true on success, or false on failure.

Example1

Try out the below example -

<?php
   $handle = fopen("/PhpProject/sample.txt", "r+");

   fwrite($handle, "Long sentence");
   rewind($handle);
   fwrite($handle, "Hello PHP");
   rewind($handle);
 
   echo fread($handle, filesize("/PhpProject/sample.txt"));
   fclose($handle);
?>

Output

When the above code is executed, it will produce the following result -

Hello PHPence

Example2

Try out the below example -

<?php
   $file = fopen("/PhpProject/sample.txt", "r");

   fseek($file, "15");  // Change the position of file pointer
   rewind($file);  // Set the file pointer to 0
   
   fclose($file);
?>


Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial guide, we are going to be discussing about the PHP rmdir() Function.

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