Concatenate a Link in PHP using single quotes

[Andy Rivers]

Hi all,

 

I have the following PHP code block:

<?php
  $website = "http://www.nationalgeographic.com";

  echo 'Catch up on all the latest, visit: <a href=" ' . $website .' ">National Geographic</a>'; //works
  echo "<br><br>";
 
  echo 'Catch up on all the latest, visit: <a href= ' . $website .' >National Geographic</a>'; //works 
  echo "<br><br>";
 
 echo 'Catch up on all the latest, visit: <a href="  . $website . ">National Geographic</a>'; // Does not work
 ?>

 

 

Why do examples 1 and 2 only work and which is the best option to go with, if any, around the <a href="">?

 

i.e. <a href=" ' . $website . ' "> or <a href= ' . $website . ' > or does it matter?

 

Thanks,

 

Andy ;-)

[requinix]

Always use quotes with HTML attributes.

 

But your two versions with quotes are also adding spaces that shouldn't be there:

"......"

is going to produce

[Andy Rivers]

Ok thanks,  I just put the spaces for ease of reading.

 

I see now it is all to do with the declaring and initialising of the variables and if double or single quotes have been used in that part. Thanks, andy ;-) 

[ginerjm]

IMHO - it is usually easier to start one of these with double quotes and then wrap the attributes in single ones, that way your php vars are properly recognized.

[maxxd]

A variable in double quotes will be parsed, whereas a variable in single quotes will not be parsed, but rather treated as a string literal - it doesn't matter where or how the variables are declared.