How to use file functions(fopen,fgets,fwrite,fclose) in php

In this tutorials I will show you how to read the file and write the file using php functions.

First make test.txt file and put some dummy content in that file.

Note: Make test.txt file group permission to 777 or writeable and readable.

<?php
$fp = fopen("test.txt","w");
 while(!feof($fp))
 {
 $data = fgets($fp);
 echo "alert($data);";
 }
 fwrite($fp, 'this is test text');
 fclose($fp);
?>

Using following function You are able to check the file size.

$fp = fopen('test.txt', 'r');
echo $data = fread($fp, filesize('test.txt'));
fclose($fp);

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22 thoughts on “How to use file functions(fopen,fgets,fwrite,fclose) in php

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