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What does $$ (dollar dollar or double dollar) mean in PHP?
... such as $$variable is called Variable Variable.
For example, if you consider this portion of code :
$real_variable = 'test';
$name = 'real_variable';
echo $$name;
You will get the following output :
test
Here :
$real_variable contains test
$name contains the name of your variable : 'real...
Asynchronous shell exec in PHP
...
@MichaelJMulligan it closes the file descriptors. That said, despite the efficiency gains, in hindsight, using /dev/null is the better practice, as writing to closed FDs causes errors, whereas attempts to read or write to /dev/null simply silently do nothing.
–...
HTML inside Twitter Bootstrap popover
I am trying to display HTML inside a bootstrap popover, but somehow it's not working. I found some answers here but it won't work for me. Please let me know if I'm doing something wrong.
...
docker mounting volumes on host
...
The VOLUME command will mount a directory inside your container and store any files created or edited inside that directory on your hosts disk outside the container file structure, bypassing the union file system.
The idea is that your volumes can be shared between you...
How do I get the currently displayed fragment?
I am playing with fragments in Android.
50 Answers
50
...
How to get full path of selected file on change of using javascript, jquery-ajax
... access to the File System, however using HTML5 File API, only Firefox provides a mozFullPath property, but if you try to get the value it returns an empty string:
$('input[type=file]').change(function () {
console.log(this.files[0].mozFullPath);
});
http://jsfiddle.net/SCK5A/
So don't waste...
How to position text over an image in css
...
How about something like this: http://jsfiddle.net/EgLKV/3/
Its done by using position:absolute and z-index to place the text over the image.
#container {
height: 400px;
width: 400px;
position: relative;
}
#image {
position: absolute;
left: 0;...
C# - Selectively suppress custom Obsolete warnings
...sable:
using System;
class Test
{
[Obsolete("Message")]
static void Foo(string x)
{
}
static void Main(string[] args)
{
#pragma warning disable 0618
// This one is okay
Foo("Good");
#pragma warning restore 0618
// This call is bad
Foo("Bad"...
Best way to define private methods for a class in Objective-C
...
There isn't, as others have already said, such a thing as a private method in Objective-C. However, starting in Objective-C 2.0 (meaning Mac OS X Leopard, iPhone OS 2.0, and later) you can create a category with an empty name (i.e. @interface MyClass ()) called C...
Saving timestamp in mysql table using php
...he FROM_UNIXTIME() function for this.
Like this:
INSERT INTO table_name
(id,d_id,l_id,connection,s_time,upload_items_count,download_items_count,t_time,status)
VALUES
(1,5,9,'2',FROM_UNIXTIME(1299762201428),5,10,20,'1'),
(2,5,9,'2',FROM_UNIXTIME(1299762201428),5,10,20,'1')
...