使用正则表达式从Google Fonts URL获取字体名称

Question

Please tell me how to preg_match font names from the Google Fonts URL.

For example, I want to extract the font name from:

http://fonts.googleapis.com/css?family=Oswald:400,300
http://fonts.googleapis.com/css?family=Roboto+Slab

in order to get the font names Oswald and Roboto Slab.

Answer 1

Here's an example of what you might do with preg_replace(), however be careful data mining Google.

<?php
$urls = array("http://fonts.googleapis.com/css?family=Oswald:400,300",
"http://fonts.googleapis.com/css?family=Roboto+Slab");

$patterns = array(
      //replace the path root
'!^http://fonts.googleapis.com/css\?!',
      //capture the family and avoid and any following attributes in the URI.
'!(family=[^&:]+).*$!',
      //delete the variable name
'!family=!',
      //replace the plus sign
'!\+!');
$replacements = array(
"",
'$1',
'',
' ');

foreach($urls as $url){
    $font = preg_replace($patterns,$replacements,$url);
    echo $font;

}

?>