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What is the difference between $name and $$name in PHP?
Double dollar sign makes a variable with the name equal to value of original variable.
$var = 'foo';
$$var = 'bar';
echo $foo; // output: bar
$name is variable where as
$$name is reference variable like $name=swati
and $$name=tyagi so $swati value is tyagi
Example with output
Output would be :
For more precise answer Difference between $name and $$name in PHP
$$name is a variable generates runtime
now we have two variable the first one $name and the second one $osama
echo $osama ;
the output is : feras
$this is a special variable that can't be assigned .but you can declare $this variable using "$$"
the output will be : feras
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