/**
 * 切分字符串为140个字符
 *
 * @param 
 * @arrange 512-笔记网： jb51.cc
 **/
function split_to_chunks($to,$text){
	$total_length = (140 - strlen($to));
	$text_arr = explode(" ",$text);
	$i=0;
	$message[0]="";
	foreach ($text_arr as $word){
	if ( strlen($message[$i] . $word . ' ') <= $total_length ){
	if ($text_arr[count($text_arr)-1] == $word){
	$message[$i] .= $word;
	} else {
	$message[$i] .= $word . ' ';
	}
	} else {
	$i++;
	if ($text_arr[count($text_arr)-1] == $word){
	$message[$i] = $word;
	} else {
	$message[$i] = $word . ' ';
	}
	}
	}
	return $message;
}
/***   来自编程之家 jb51.cc（jb51.cc）   ***/