Time-sensitive PHP encryption and decryption function code_PHP tutorial

Copy code The code is as follows:

function encode_pass($tex,$key,$type ="encode",$expiry=0){
$chrArr=array('a','b','c','d','e','f','g','h' ,'i','j','k','l','m','n','o','p','q','r','s','t',' u','v','w','x','y','z',
'A','B','C','D','E','F', 'G','H','I','J','K','L','M','N','O','P','Q','R','S ','T','U','V','W','X','Y','Z',
                   '0','1','2','3',' 4','5','6','7','8','9');
if($type=="decode"){
if(strlen($tex)< 14)return false; ),0,8)){
                                                                                                                                                                               0,6):$chrArr[rand()%62].$chrArr[rand()%62].$chrArr[rand()%62].$chrArr[rand()%62].$chrArr[rand( )%62].$chrArr[rand()%62];

$rand_key=$key_b.$key;
//Set time option
$modnum=0;$modCount=0 ;$modCountStr="";
if($expiry>0){
if($type=="decode"){
$modCountStr=substr($tex,6,1);
           $modCount=$modCountStr=="a"?10:floor($modCountStr);
         $modnum=substr($tex,7,$modCount);                                                                     time()-$modnum)/$expiry));
}else{
} $modnum=time()%$expiry;
$modCount==10?"a":$modCount;

$rand_key=$rand_key.(floor(time()/$expiry));
}
$tex=$type= ="decode"?base64_decode(substr($tex, (7+$modCount))):"xugui".$tex;
}else{
      $tex=$type=="decode"?base64_decode( substr($tex, 6)):"xugui".$tex;
}
$rand_key=md5($rand_key);


$texlen=strlen($tex);
$reslutstr="";
for($i=0;$i<$texlen;$i++){
$reslutstr. =$tex{$i}^$rand_key{$i%32};
}
if($type!="decode"){
$reslutstr=trim(base64_encode($reslutstr)," ===");

$reslutstr=$modCount?$modCountStr.$modnum.$reslutstr:$reslutstr;

$reslutstr=$key_b.$reslutstr;
$reslutstr=substr(md5($reslutstr ), 0,8).$reslutstr;
}else{
} if(substr($reslutstr,0, 5)!="xugui"){
return false;
}
$reslutstr=substr($reslutstr, 5);
}
return $reslutstr;
}
$psa=encode_pass("woshi ceshi yong de ","taintainxousad","encode",120 );
echo $psa;
echo "rndecryption:";
echo encode_pass($psa,"taintainxousad",'decode',120);
?>

This function is time-sensitive and cannot be decrypted as long as it expires! Dynamic encryption through time diversifies the encrypted data and increases the difficulty of cracking

http://www.bkjia.com/PHPjc/327688.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/327688.htmlTechArticleCopy the code as follows: ?php function encode_pass($tex,$key,$type="encode",$ expiry=0){ $chrArr=array('a','b','c','d','e','f','g','h','i','j', 'k','l','m','n','o','p','q','r','s',...