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What is the error in this program?
<html>
<head>
<title>Local Scope</title>
</head>
<body>
<?php
$a = 5; //global scope
function myTest()
{
echo $a; //local scope
}
myTest();
?>
</body>
</html>
3 Answers
- Anas ImtiazLv 69 years agoFavorite Answer
The script above will not produce any output because the echo statement refers to the local scope variable $a, which has not been assigned a value within this scope.
You can have local variables with the same name in different functions, because local variables are only recognized by the function in which they are declared.
Local variables are deleted as soon as the function is completed.
Try this instead:
<html>
<head>
<title>Local Scope</title>
</head>
<body>
<?php
function myTest()
{
$a = 5;
echo $a; //local scope
}
myTest();
?>
</body>
</html>
For queries, email or IM me.
Source(s): Web Developer/Designer. - 9 years ago
To access a global variable from within a function, use the global keyword:
<?php
$a = 5;
function myTest()
{
global $a;
echo $a;
}
myTest();
?>
The script above will output 5.
For more visit: http://php-addiction.blogspot.in/2012/09/php-varia...
Source(s): http://php-addiction.blogspot.in/ - 7 years ago
access a global variable from within a function, use the global keyword:
<?php
$a = 5;
function myTest()
{
global $a;
echo $a;
}
myTest();
?>
The script above will output 5.
