Jashua says "Welcome!"
The escape slash lets you include double quotes inside a
double quoted string without ending it early.
It tells PHP to treat
the next character as text instead of as the string's
closing signal.
$name says "Welcome!"
No escape slash is needed here because the outer string uses single
quotes, and single quoted strings treat double quotes as ordinary characters.
We do notice that single quotes do not translate variables, so $name becomes regular text.