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Can you use if/else conditions in CSS?
... your stylesheet with your favourite server-side language. If you're using PHP, serve a style.css.php file, that looks something like this:
p {
background-position: <?php echo (@$_GET['foo'] == 'bar')? "150" : "4"; ?>px 8px;
}
In this case, you will however have a performance impact, sinc...
mysqli_fetch_assoc() expects parameter / Call to a member function bind_param() errors. How to get t
...s the reason. Unfortunately, by default such errors are not transferred to PHP, and all you've got is a cryptic error message mentioned above. Hence it is very important to configure PHP and MySQLi to report MySQL errors to you. And once you get the error message, fixing it will be a piece of cake....
Set a cookie to never expire
Looking at the php documentation on setting a cookie I see that I can set an expiration date for the cookie. You can set the cookie to expire at the end of the browser session or at some time in the future but I do not see a way to set the cookie to never expire. Is this even possible and how is...
How to escape single quotes in MySQL
...re using to talk to MySQL will have an escaping function built in, e.g. in PHP you could use mysqli_real_escape_string or PDO::quote
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Secure hash and salt for PHP passwords
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DISCLAIMER: This answer was written in 2008.
Since then, PHP has given us password_hash and password_verify and, since their introduction, they are the recommended password hashing & checking method.
The theory of the answer is still a good read though.
TL;DR
Don'ts
D...
New line in JavaScript alert box
...s to display special char like \n \t etc... in js alert box
for exemple in php script:
$string = 'Hello everybody \n this is an alert box';
echo "<script>alert(\"$string\")</script>";
But a second possible problem arrives when you want to display a string specified in double quoted.
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Calling a function within a Class method?
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Is it possible to run a function() from another .php page inside a class function and then grab results inside the class function? e.g I have a query that selects all from a table and then returns a fetch all result set. Is it possible to loop through that result set inside...
PHP Get Site URL Protocol - http vs https
...wered Dec 21 '10 at 19:38
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List all files in one directory PHP [duplicate]
What would be the best way to list all the files in one directory with PHP? Is there a $_SERVER function to do this? I would like to list all the files in the usernames/ directory and loop over that result with a link, so that I can just click the hyperlink of the filename to get there. Thanks!
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PHP去除字符串中的最后一个字符 - 更多技术 - 清泛网 - 专注C/C++及内核技术
PHP去除字符串中的最后一个字符最常见的方法是substr($str, strlen($str) - 1)，但使用rtrim($str, , )更优雅。
<?php //PHP去除字符串中的最后一个字符
$str="aaaa,bbb,ccc,ddd,eee,";
echo rtrim($str,','); //第一种方法 trim($str,$chsrlist)去除两边的
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