返回字符串前N个单词的PHP函数

Posted 2021-02-27

function shorten_string($string, $wordsreturned)
/*  Returns the first $wordsreturned out of $string.  If string
	contains more words than $wordsreturned, the entire string
	is returned.*/
{
	$retval = $string;	//	Just in case of a problem
	$array = explode(" ", $string);
	/*  Already short enough, return the whole thing*/
	if (count($array)<=$wordsreturned)
	{
		$retval = $string;
	}
	/*  Need to chop of some words*/
	else
	{
		array_splice($array, $wordsreturned);
		$retval = implode(" ", $array)." ...";
	}
	return $retval;
}