Error Variables Php
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring http://stackoverflow.com/questions/20391807/how-do-i-fix-undefined-variable-error-in-php developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask https://www.tutorialspoint.com/php/php_error_handling.htm Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How do I fix Undefined variable error in PHP? up vote 1 down vote favorite Today, I have started to learn PHP. And, I have created my first PHP file to php error test different variables. You can see my file as follow. Test variables inside the function:
"; echo "Variable x is: $x"; echo "
"; echo "Variable y is: $y"; } myTest(); echo "
Test variables outside the function:
"; echo "Variable x is: $x"; echo "
"; echo "Variable y is: $y"; ?> I have found following error when I have run this file in browser. Notice: Undefined variable: x in error in variables /opt/lampp/htdocs/anand/php/index.php on line 19 Notice: Undefined variable: y in /opt/lampp/htdocs/anand/php/index.php on line 29 Can anybody help me to fix issue regarding it? php error-handling compiler-errors syntax-error runtime-error share|improve this question edited Dec 5 '13 at 6:10 zzlalani 8,967123155 asked Dec 5 '13 at 4:59 Anand Mistry 6112 You can make Global variable for this error . php.net/manual/en/reserved.variables.globals.php –Zeeshan Dec 5 '13 at 5:05 add a comment| 7 Answers 7 active oldest votes up vote 2 down vote The first error ($x is undefined) is because globals are not imported into functions by default (as opposed to "super globals", which are). You need to tell your function you're referencing the global variable $x: function myTest() { global $x; // $x refers to the global variable $y=10; // local scope echo "
Test variables inside the function:
"; echo "Variable x is: $x"; echo "
"; echo "Variable y is: $y"; } Otherwise, PHP cannot tell whether you are shadowing the global variable with a local variable of the same name. The second error ($y is undefined), is because local scope is just that, local. The whole point of it is that $y doesn't "leak" out of the function. Of course you cannot access $y later in your code, outside the function in which it is defined. If you could, it would be no different than a global. share|improve this answer answered Dec 5 '13 at
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