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In this blog I am going to to how to declare PHP variable output, PHP Variables Scope, PHP Global and Local Scope, PHP Global Keyword variable quotes and more.
Creating (Declaring) PHP Variables-
In PHP, a variable starts $ sign, this is mandatory for output or result
Variable always start with $ sign,
A variable name cannot start with a number.
A variable must start with a letter or underscore.
ex-
| <?php | |
| $a = 5; | |
| $b = 4; | |
| echo $a + $b; | |
| $example = "In this line $ for Declaring variable"; | |
| echo "<br>"; | |
| echo $example; | |
| ?> |
by 
PHP local scope:
Any variable declared inside a function is considered as in local scopte of function scope. It can be accessible only inside that function where it is declared.
| <?php | |
| function test(){ | |
| $x = "This is PHP local" ; | |
| $y = " scope example." ; | |
| echo $x . $y; | |
| } | |
| test(); | |
| ?> |
PHP global Scope
Any variable declared outside a function is considered as in the global scope. It can be accessed anywhere in the script.
| <?php | |
| $a= 10; | |
| echo "a = ", $a, "<br>"; | |
| function test(){ | |
| global $a; | |
| echo "$a = ", $a, "<br>"; | |
| } | |
| test(); | |
| ?> |
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