How to use JavaScript and PHP keyword search functions

This article mainly introduces relevant information on how to use JavaScript and PHP keyword search functions. Friends in need can refer to it.

javascript:

a. Code:

/*
@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 = 0
var max = str.length
var index = str.indexOf(key)
var left = index - 10
var right = index + 10
if(left<min){
 left = min
}
if(right>max){
 right = max
}
var out = str.slice(left,right)
return out
}

b. Test:

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)

c. Output:

Where? Can I come over and play with you? Why don't you answer me

php:

a. Code:

<?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;
}

b. Test:

$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;

c. Output: Where is

? Can I come over and play with you? Why don't you answer me?

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