Interested to Buy Any Domain ? << Click Here >> for more details...
What is difference between $x and $$x
- 5 Answers
- 18457 Views
- Mindex, Net Solution, Procon IT Solutions, Trigent, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / deepesh mehta
This type of variable diclearation is called "Variable
variables".
Sometimes it is convenient to be able to have variable
variable names. That is, a variable name which can be set
and used dynamically. A normal variable is set with a
statement such as:
$x = 'hello';
A variable variable takes the value of a variable and
treats that as the name of a variable. In the above
example, hello, can be used as the name of a variable by
using two dollar signs. i.e.
$$x = 'world';
At this point two variables have been defined and stored in
the PHP symbol tree: $a with contents "hello" and $hello
with contents "world". Therefore, this statement
echo "$x ${$x}";
produces the exact same output as:
echo "$a $hello";
i.e. they both produce: hello world.
| Is This Answer Correct ? | 34 Yes | 8 No |
Answer / chinuku
$var is a variable and $$variable is a Reference or Dynamic
variable
ex:$var="test";
$test="php";
<?php
echo $var;
echo $$var;
?>
ans
$var=test;
$$var=php;
| Is This Answer Correct ? | 22 Yes | 4 No |
Answer / muzic
$x is a simple variable whereas $$x is a reference variable.
| Is This Answer Correct ? | 18 Yes | 4 No |
Answer / psharma05
$x is a simple variable where $$x means value of $x becomes other variable.
eg.
$x="hello";
$$x="hi";
echo $hello;
output will be:
hi
| Is This Answer Correct ? | 11 Yes | 5 No |
Answer / khan
Visit http://filesharepoint.com To Download free Scripts
books and many more just click the link below
<a
href='http://filesharepoint.com'>http://filesharepoint.com</a>
| Is This Answer Correct ? | 0 Yes | 7 No |
What is in php 7?
What is mysql_fetch_row?
Does php use html?
What does pear stand for?
What is the best website to learn php?
Explain me what are the differences between mysql_fetch_array(), mysql_fetch_object(), mysql_fetch_row()?
If the variable $var1 is set to 10 and the $var2 is set to the character var1, what's the value of $$var2?
Which will check if a function exists?
What is the use of mysqli_real_escape_string() function?
Write a function that takes "depth" as argument and return sum of node's data of that depth. For instance, (0) depth 0 / \ (10) (20) depth 1 / \ (40) (50) depth2 If I pass get_sum_by_depth(2) , it would return 90 (i.e. 40 + 50 )
What are the rules in creating php variable?
What is the difference between exception::getmessage and exception::getline?
PHP 
