Php $ variable assignment and detailed description

Source: Internet
Author: User


<? Php $ a = 'hello';?>

, As shown below.

<? Php $ a = 'world';?>

Using the preceding two statements, two variables are defined: the variable $ a, which contains "hello" and the variable $ hello, and the variable "world ". The following language:

<? Php echo "$ a $ {$ a}";?>

The output is exactly the same as that of the following statement:

<? Php echo "$ a $ hello";?>

They all output: hello world.

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