Hola amigo no podra ser por que en el link 5 no indicaste http://
Código PHP:
Ver original$subject = 'link1 http://www.youtube.com/watch?v=CkSdiBltgYo&feature=fvwrel<br>
link2 www.youtube.com/watch?v=CkSdiBltgYo&feature=fvwrel<br>
link3 https://www.youtube.com/watch?v=CkSdiBltgYo&feature=fvwrel<br>
link4 ftp://youtube.com/watch?v=CkSdiBltgYo&feature=fvwrel<br>
link5 snipplr.com/view/64247/';
deberia de ser
Código PHP:
Ver original$subject = 'link1 http://www.youtube.com/watch?v=CkSdiBltgYo&feature=fvwrel<br>
link2 www.youtube.com/watch?v=CkSdiBltgYo&feature=fvwrel<br>
link3 https://www.youtube.com/watch?v=CkSdiBltgYo&feature=fvwrel<br>
link4 ftp://youtube.com/watch?v=CkSdiBltgYo&feature=fvwrel<br>
link5 http://snipplr.com/view/64247/';
saludos