replace a specific line in a php file

[litewarez]

Use var_export

<?php

//Load your file and change values like so:
include 'yourphpfile.php';
$options['user_dir'] = 'New String';

//var_export prints the result in a way it can be read again by PHP
$contents = "<?php\r\n" . ' $options = ' . var_export($options,true) . "\r\n" . ' ?>';

//Put the new contents in the file.
file_put_contents('yourphpfile.php',$contents);
?>

Your new contents would look like so:

<?php
$options = array(
    'used_dir' => 'New String', 
    'login' => true, 
)
?>

No too hard!

http://php.net/manual/en/function.var-export.php