for (var i = 0; i < 5; i++) {
setTimeout(function() {
console.log(i);
},i * 1000 );
}Hello, in the following piece of code, the value of i is always 5 , in the console.log(). Why?
I see that since I don't know which version of MySQL the group by forces to enter all the fields of the select. (this is configurable, but I have no option to change it). I don't understand why you have to put all the fields of the select in the group by, if I only want to group by the user id for example.
If someone is kind enough to explain (for fools, with apples) the reason for this, I would be eternally grateful... I'm looking on the internet, and I don't understand the reasons they give. They say they are good practices, but until recently it could be done without problems and now... :(
A website had an external website linked by a iframe, for example:
example.com/hls/archive.php?token=f4290354ed8529245633fd8266a8238c44e4ef5aa87d50ff16
I liked that content and linked it on my website, but it didn't show me the data after analyzing your website one after another I realized that my URL where the iframecontent was had to add this:
misite.com/iframe.php?noimportaesto=example.com
The domain taken by $_get= =example.comwas the key token f4290354ed8529245633fd8266a8238c44e4ef5aa87d50ff16to access the content.
From there, my idea is born to block the access of each topic that my content subdomain has (ex. view.site.com/contenido1.php) block access if it enters with an tokenexpired or invalid one, and if that is the case show a warning message communicating that you will be redirected in xseconds to another website.
But access to the content must be unique, only for that user, that is, they cannot share the generated link with the token, and if they do, the content is not displayed.
And that this tokengenerated is only valid for the content that was redirected from the domain example.comto the content: that only that URLview.site.com/contenido1.php allows access , if you try to access other content , that is not valid, you must always generate a from the domain to access to said or other content.contenido2.phptokenexample.com
If the security of is broken
token cookieor is not found, it simply becomesfalse, and if it exists it becomestrue.
The token will be generated using new PHP technology , including the use of: bin2hex(random_bytes)orbin2hex(openssl_random_pseudo_bytes) .
No use of database or use of .htaccess, the tokenonly one must be saved in one cookieand must expire within 4 hours.
So far I can generate a token, but I don't know how to validate it with the comments:
<?php
//http://php.net/manual/es/function.phpversion.php
//echo 'Versión actual de PHP: ' . phpversion();
session_start();
$expiry_timestamp = time() + $expiry;
//https://davidwalsh.name/random_bytes //https://secure.php.net/random_bytes
//$token = bin2hex(random_bytes(64)); //Disponible apartir de PHP V 7.
$token = bin2hex(openssl_random_pseudo_bytes(64));
$time_token = 12000;
$time_token = srand(floor(time() / $time_token));
//echo $token;
$_SESSION['token']=$token;
?>
<html>
<head>
</head>
<body>
<a href= "view.site.com/contenido1.php?token=<?php echo $_SESSION['token']; ?>">Contenido 1</a>
</body>
</html>
I do not understand very well how this process would work, can you explain the subject better to me. tokenI must work something similar Deactivate session after a while only that instead of sesiónusing one cookiethat matches the tokenonly one generated for that user, taking the domain and subdomain as reference keys.
Font:
The truth is that it causes me a lot of confusion to see this type of operators, I don't know what it means or why it is placed.
checkedit1.CheckStateChanged += CheckValorSi_CheckStateChanged;
We have the following code block:
<?php
var_dump(md5("240610708")=="0e1337");
?>
Which returns bool (true), that is, for PHP the md5 of 240610708 is the same as any string that begins with 0e followed by a number. How does this happen?