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How do I check if a directory exists? “is_dir”, “file_exists” or both?
...ent, but it's not a dir
//do something with file - delete, rename, etc.
unlink('file'); //for example
mkdir('file', NEEDED_ACCESS_LEVEL);
}
} else { //no file exists with this name
mkdir('file', NEEDED_ACCESS_LEVEL);
}
...
Gradients in Internet Explorer 9
...he gradient, or make it more sophisticated (radial gradients, transparency etc.) but this is great for those simple (vertical) linear gradients.
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What are the best PHP input sanitizing functions?
...will be used in the header (like the From: name and email address, subect, etc)
$input = preg_replace('/\s+/', ' ', $input);
If you don't do this it's just a matter of time before the spam bots find your form and abuse it, I've learned the hard way.
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What is a postback?
...age will be manipulated by the user (a button clicked or dropdown changed, etc), and this control will initiate a postback. The state of this control, plus all other controls on the page,(known as the View State) is Posted Back to the web server.
What happens?
Most commonly the postback causes the...
Is it a good practice to use an empty URL for a HTML form's action attribute? (action=“”)
...rted into the database
The user's identifying information (email, address, etc) has been compromised
References
Bypassing CSRF protections with ClickJacking and HTTP Parameter Pollution
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best practice to generate random token for forgot password
...is - whole user account)
So, the code will be as follows:
//$length = 78 etc
$token = bin2hex(random_bytes($length));
Update: previous versions of this answer was referring to uniqid() and that is incorrect if there is a matter of security and not only uniqueness. uniqid() is essentially just ...
How can I force users to access my page over HTTPS instead of HTTP?
...Doesn't REQUEST_URI not include the "query string" (like ?page=1&id=41 etc.)? That's what the apache documentation says... So if I try to access site.com/index.php?page=1&id=12 I will be redirected site.com/index.php
– Rolf
Jul 8 '13 at 13:00
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How do I resolve a HTTP 414 “Request URI too long” error?
...ault of 8190 if you want to support a longer request URI. The value is in /etc/apache2/apache2.conf. If not, add a new line (LimitRequestLine 10000) under AccessFileName .htaccess.
However, note that if you're actually running into this limit, you are probably abusing GET to begin with. You should...
How to make MySQL handle UTF-8 properly
...
It didn't work in my case but I created file my.cf in /etc with given content anyway. I used create table my_name(field_name varchar(25) character set utf8);
– Marek Bar
Jul 9 '12 at 11:43
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Detect when browser receives file download
...alue to the token's value.
Client source code (JavaScript):
function getCookie( name ) {
var parts = document.cookie.split(name + "=");
if (parts.length == 2) return parts.pop().split(";").shift();
}
function expireCookie( cName ) {
document.cookie =
encodeURIComponent(cName) ...