Template:is url

Demo

• Is https://diffie.eu an URL (and not an article name)? yes
• Is ftp://ftp.diffie.eu an URL (and not an article name)? yes
• Is //ftp.diffie.eu an URL (and not an article name)? yes
• Is /wiki/foo/bar an URL (and not an article name)? yes
• Is Main_Page an URL (and not an article name)? no
• Is Main Page an URL (and not an article name)? no

Parameters

preview=1 (a non-empty string)

Produce demos like these above.

yes and no

What to return if it is/isn't an URL.

doubly slashed and slash prefixed

More specialized forms of yes=