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What does the PHP error message “Notice: Use of undefined constant” mean?
...l_escape_string($_POST['message']);
As is, it was looking for constants called department, name, email, message, etc. When it doesn't find such a constant, PHP (bizarrely) interprets it as a string ('department', etc). Obviously, this can easily break if you do defined such a constant later (tho...
Best way to do multiple constructors in PHP
...
<?php
class Student
{
public function __construct() {
// allocate your stuff
}
public static function withID( $id ) {
$instance = new self();
$instance->loadByID( $id );
return $instance;
}
public static function withRow( array $row ) {
...
Why would $_FILES be empty when uploading files to PHP?
I have WampServer 2 installed on my Windows 7 computer. I'm using Apache 2.2.11 and PHP 5.2.11. When I attempt to upload any file from a form, it seems to upload, but in PHP, the $_FILES array is empty. There is no file in the c:\wamp\tmp folder. I have configured php.ini to allow file uploads...
How can I get the MAC and the IP address of a connected client in PHP?
... address, you could parse the output of netstat -ie in Linux, or ipconfig /all in Windows.
Client IP address
You can get the client IP from $_SERVER['REMOTE_ADDR']
Client MAC address
The client MAC address will not be available to you except in one special circumstance: if the client is on the s...
Reference — What does this symbol mean in PHP?
... have the same results.
Pre-increment is a little bit faster because it really increments the variable and after that 'returns' the result. Post-increment creates a special variable, copies there the value of the first variable and only after the first variable is used, replaces its value with seco...
Synchronous request in Node.js
If I need to call 3 http API in sequential order, what would be a better alternative to the following code:
18 Answers
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iOS开发调试技巧总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...跑到出现异常的代码中呢？？？异常断点就为我们解决该问题，程序就会在异常出现的那行代码终止。创建异常断点图例如下：
如下所示就创建完成了。如果碰到异常crash时，尝试使用异常断点吧。
【4.符号断点Symbolic Breakp...
创建增量同步Oracle物化视图问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
创建增量同步Oracle物化视图问题我们采用Oracle的物化视图增量刷新机制定时将数据库A上的某个表的数据同步到另一个数据库B上。我们常用的最简单的实现步骤是这样。首先在数...我们采用Oracle的物化视图增量刷新机制定时将数...
Exploitable PHP functions
...purpose isn't to list functions that should be blacklisted or otherwise disallowed. Rather, I'd like to have a grep -able list of red-flag keywords handy when searching a compromised server for back-doors.
...
What does the variable $this mean in PHP?
I see the variable $this in PHP all the time and I have no idea what it's used for. I've never personally used it.
10 An...