Variable Variables are just variables whose name can be set and accessed by programmatically.
How to use variable variables?
Example:
<?php $myVar = "hello"; ?>
Now can you imagine, in the above example "hello" can be use as the name of a variable by using two dollor signs. i.e.
<?php $$myVar = "world!!"; ?>
Variable Variables takes the value of a variable and treat that as the name of variable. In the example above it is treating "hello" as a variable.
<?php echo $myVar . "<br>"; //Output: hello echo $hello . "<br>"; //Output: world!! echo "$myVar $hello"; //Output: hello world!! ?>
If you don't want to use "hello" as a variable name (which is I think not a better way) then you can use double dollor sign ($$). i.e.
<?php echo $myVar . "<br>"; //Output: hello echo $$myVar . "<br>"; //Output: world!! echo "$myVar ${$myVar}" . "<br>"; //Output: hello word!! ?>
For more reference visit PHP Manual: http://php.net/manual/en/language.variables.variable.php
Thanks. Have a great day!!
