PHP - get first two sentences of a text?

Question

My variable $content contains my text. I want to create an excerpt from $content and display the first sentence and if the sentence is shorter than 15

Answer 1

If I were you, I'd choose to pick only the first sentence.

$t='Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Vestibulum justo eu leo.'; //input text
$fp=explode('. ',$t); //first phrase
echo $fp[0].'.'; //note I added the final ponctuation

This would simplyfy things a lot.