How to write this echo statment

[cmb]

i don't know how to write this

<a href='#' onclick="toggle_visibility('login');" style='color:white'>Login</a>

inside and echo so it works right because for the onclick to work right it has to be in double quote's and not single so this doesn't work

<?php
echo "<a href='#' onclick='toggle_visibility('login');' style='color:white'>Login</a>";
?>

[Hooker]

i don't know how to write this

<a href='#' onclick="toggle_visibility('login');" style='color:white'>Login</a>

inside and echo so it works right because for the onclick to work right it has to be in double quote's and not single so this doesn't work

<?php
echo "<a href='#' onclick='toggle_visibility(\"login\");' style='color:white'>Login</a>";
?>