When to use which quotes

[Crump]

I have been programming PHP for a while, but I never full understood the quotes.

When is it better to use ' ' as opposed to " "?

[eelixduppy]

Apparently using single quotes(') is faster than using double, but with the single quotes PHP will not parse variables within the quotes but just output the variable name. If you are going to place variables within a string, you have to use double quotes.

$fish = "blue fish";
echo 'I love $fish'; //prints I love $fish
echo "I love $fish"; //prints I love blue fish
//or
echo 'I love '.$fish;

[mcavic]

Agreed. I always use double quotes in PHP for that reason. That way, it also allows me to consistently use single quotes for html/javascript output. For example,

print "<table border='1'>";

[jatar_k]

have you read this?
[php.net...]