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this function takes the first x words or paragraphs from a long text and displays it as teaser with a "read more" link underneath.
<?
function summarize($paragraph, $limit,$link)
{
$tok = strtok($paragraph, " ");
while($tok)
{
$text .= " $tok";
$words++;
if(($words >= $limit) && ((substr($tok, -1) == "!")||(substr($tok, -1) == ".")))
break;
$tok = strtok(" ");
}
$text .= ' '.$link;
return ltrim($text);
}
// use like this
$example = ' Heres some code to extract the first part of a long paragraph, e.g. to use as a summary. Starting at the beginning of the paragraph it gets as many complete sentences as are necessary to contain $limit words. For example, with $limit at 20 it would return the first two sentences of the paragraph e reading right now (the first 20 words plus the rest of the sentence in which the limit was hit)';
$link = '<a href="example.php?article=xxx">read more</a>';
echo summarize($example,5,$link);
?>
learn more about some of the PHP functions used in this snippet: break, echo, extract, function, link, ltrim, ord, return, strtok, substr, trim, while
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