Interested to Buy Any Domain ? << Click Here >> for more details...
What is difference between $x and $$x
- 5 Answers
- 18669 Views
- Mindex, Net Solution, Procon IT Solutions, Trigent, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / deepesh mehta
This type of variable diclearation is called "Variable
variables".
Sometimes it is convenient to be able to have variable
variable names. That is, a variable name which can be set
and used dynamically. A normal variable is set with a
statement such as:
$x = 'hello';
A variable variable takes the value of a variable and
treats that as the name of a variable. In the above
example, hello, can be used as the name of a variable by
using two dollar signs. i.e.
$$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 |
Explain the difference between session and cookies in php?
Hello Friends,I am seeking for a job in php having 2yrs. exp.Please suggest any company openings.
What does $this do in php?
How should a model be structured in mvc?
What is the difference between using copy() and move() function in PHP file uploading?
Is runtime polymorphism overriding?
What is mysqli php?
What is cookie and session in php?
Does php class need constructor?
How to break a file path name into parts?
Is multilevel inheritance possible in php?
What is the function to count elements in an array in PHP?
PHP 
