PHP replace string after using file_get_contents

Question

Hi I am looking to replace words in an html email I am loading via file_get_contents

Here is my code:

Answer 1

You shouldn't use regular expressions for this; it's simple string replacement:

$message = strtr($message, array(
    '$SAD' => 'HAPPY',
));

Btw, if you use "$SAD" for the search string, PHP will try to evaluate a variable called $SAD, which doesn't exist and will throw a notice if your error_reporting is configured to show it.

Answer 2

$message = str_replace("$SAD", "HAPPY", $message);

needs to be:

$message = str_replace('$SAD', "HAPPY", $message);

Otherwise PHP will interpret it as the variable $SAD. See this post for an explanation on the difference between single and double quotes.