javascript、php关键字搜索函数的使用方法

/*@desc：js搜索函数，可用于关键字匹配@param key 关键字@param str 要搜索的字符串@return out 匹配关键字前后出现的位置*/function search(key,str){var min = 0var max = str.lengthvar index = str.indexOf(key)var left = index - 10var right = index + 10if(left<min){ left = min}if(right>max){ right = max}var out = str.slice(left,right)return out}

var str = '你好吗？你在哪里呀？我可以过来找你玩吗？你怎么不回答我呀！'var key = '玩'var res = search(key,str)console.log(res)

<?php/*@desc：php搜索函数，可用于关键字匹配@param key 关键字@param str 要搜索的字符串@return out 匹配关键字前后出现的位置*/function search($key,$str){$min = 0;$max = mb_strlen($str);$index = mb_strpos($str,$key);$left = $index - 10;$right = $index + 10;if($left<$min){  $left = $min;}if($right>$max){  $right = $max;}$len = $right - $left;$out = mb_substr($str,$left,$len);return $out;}

$str = '你好吗？你在哪里呀？我可以过来找你玩吗？你怎么不回答我呀！';$key = '玩';$res = search($key,$str);echo $res;