single quotes or double quotes in php

planepixel · 02-03-2009, 03:29 AM

Hi

i am confused about which quotes to use.

PHP Code:


			
 $firstName = "first name";
 $secondName = 'second name';

 echo 'first name is ' . $firstName . '. it is good name ';
 echo "second name is $secondName.";

which approach is good. I read that single quotes give better performance.
which one you recommend?

thanks

Krik · 02-03-2009, 04:34 AM

Go with single quote better performance and when you have to echo out HTML you can keep your double quotes for your HTML.

PHP Code:


			
echo '<span id="myspan">' . $mytext . '</span>';

Also a note on the example code you game that last echo

PHP Code:


			
echo "second name is $secondName.";

That "." may get in trouble. Better to

PHP Code:


			
echo 'second name is' . $secondName . '.';

Wildhoney · 02-03-2009, 01:08 PM

Though don't forget that any special character beginning with a back-slash: \b (backspace), \n (line break), \t (tab), etcetera, doesn't work as expected when encapsulated with single quotes. For that to work you must break out of your single quotes:

php Code:

echo 'Put this on' . "\n";
echo '...Two lines!';

CoryMathews · 02-03-2009, 01:35 PM

the amount of speed gained won't matter to much. Usually thats not the bottleneck. So it really comes down to which one you want to use and which one is easier in the specific case.

Wildhoney · 02-04-2009, 01:44 AM

Actually, Cory has a point because most of the time I tend to use sprintf for readability purposes.

planepixel · 02-04-2009, 05:48 AM

Thanks. no confusion now.