file - store emails in textfile? php -

this spinet of code renders users email when user enters page of site: . .

$email=$userprofile->email;

. . can echo this:

<?php echo $email;?>

but how store in text file 1 email per line?

file_put_contents("name_of_file.txt", preg_replace("/\r|\n/"," ", $email)."\n");

learn use php docs. excellent.

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