PHP Variable Scope:– Scope of a variable means who can see and use it. In other words we can say that when we use a variable inside a function it refers to local variable and if it is defined outside the function ; it is called as globale variable because we can access it anywhere within the program.
PHP Variable Scope | Example
Let us take an example to understand scope of a variable.
Below we get two compile errors while executing below program because we are trying to access $x i.e global variable inside a function. Similarily we can not access a local variable outside the function.
Example
<?php $x=10;
function play(){
$y=20;
echo $y;
echo $x;// compile error
echo "<br?>";
echo "hey";
echo "<br/>";
}
play();
echo $x;
echo $y;//compile error
?>
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