Remove Line from file using preg_replace

Question

I want remove this line from my config file

line :define('APP_MAIL_FROM_EMAIL_NAME','example');

Here is my code

<?php $configFileContents = file_get_contents('config.php'); if (!empty($configFileContents)) { if (strstr($configFileContents, 'define(\'APP_MAIL_FROM_EMAIL_NAME\',')) { $configFileContents = preg_replace('/define\(\'APP_MAIL_FROM_EMAIL_NAME.*\R/', '', $configFileContents); } file_put_contents("config.php", $configFileContents); } ?>

This code working fine but if that line like this

line :define('APP_MAIL_FROM_EMAIL_NAME' ,'example');

if space present between APP_MAIL_FROM_EMAIL_NAME' , and comma its not working what is the problem any changes needed what??

even if i removed \R not working . and also its removing only content but not removing entire content — Kuppuraj
– Kuppuraj, Commented Sep 1, 2015 at 14:20

Kuppuraj · Accepted Answer · 2016-01-28 13:40:29Z

Try this it will include all space between your character

preg_replace('/define\(\'APP_MAIL_FROM_EMAIL_NAME.s+*\R/', '', $configFileContents);

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