php array search key function

Provide three methods to determine whether a string includes the words we defined, which is more suitable for keyword filtering in messages, comments and other addresses. The example code is as follows:

$crud = array('China||| Our country|||地', 'kelon|||lerke|||sb', 'sesscxx');

$crud = join('|',$crud);

$crud = str_replace('||| ', '|', $crud);

$pat = "/({$crud})/i";

$txt = 'I know who you are sdfex in China! ! ';

preg_match/*_all*/($pat, $txt, $matches);

var_dump($matches);

Method 2, the code is as follows:

function checkcrud($str, $crud)

{

if(is_array($crud) && !emptyempty($crud))

{

foreach($crud as $value)

{

if(strpos($value, '|||') ! == false)

                                                                                                                                                                                                                                                                                                                                    using val)

                                                                                                                                                                         $check++;                                                                                                                                          

                                                                     ​​​{                                                                                                      }

            return false;                                                                       $test1 = 'I am Chinese. There are many people in my country. The earth is full of people.-__-!! What a good sentence.';

var_dump(checkcrud($test1, $crud));

Method Third, the code is as follows:

function lktest($v,$keyword){

foreach ($v as $k){

if (strpos($k,"|||")!==false){

$kelon=explode("|||",$k);

//Find the maximum value of the array

$b=count($kelon);

foreach($kelon as $t){

as $t //echo "sensitive keyword";

                                                                                                     When equal to $a, all ||| keywords appear

if ($a==$b){

echo "sensitive keyword";

}

}

elseif(preg_match(' /'.$k.'/i',$keyword)){

echo "sensitive keyword";//open source code phpfensi.com

}

}

}