PHP Fatal error: Cannot redeclare function

Question

I have a function A in file B.inc

line 2:  function A() {

           ...

line 10: }

In the apache log:

PHP Fatal error: Cannot redeclare A() (previously declared in B.inc:2) in B on line 10

score 18 · Accepted Answer · answered Mar 17 '11 at 01:40

18

I suppose you're using require "B.inc" in multiple parts? Can you try using require_once in all those instances instead?

Seems like your B.inc is parsed twice.

answered Mar 17 '11 at 01:40

EboMike

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score 4 · Answer 2 · edited May 23 '17 at 12:17

4

I had a similar problem where a function entirely contained within a public function within a class was being reported as redeclared. I reduced the problem to

class B {
  function __construct() {
   function A() {
   }
  }
 }
 $b1 = new B();
 $b2 = new B();

The Fatal error: Cannot redeclare A() is produced when attempting to create $b2.

The original author of the code had protected the class declaration from being redeclared with if ( !class_exists( 'B' ) ) but this does not protect the internal function A() from being redeclared if we attempt to create more than one instance of the class.

Note: This is probably not the same problem as above BUT it's very similar to some of the answers in PHP Fatal error: Cannot redeclare class

edited May 23 '17 at 12:17

Community

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answered May 13 '13 at 22:00

bobbingwide

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This is similar to a problem I had, but my issue was having a named function defined inside a `foreach` loop. The solution ended up being using an anonymous function instead. – Mike Lyons Dec 01 '14 at 20:12
The basic answer for me was: Don't define a function inside a another function. – Daniel Tonon Jul 01 '15 at 03:19

score 3 · Answer 3 · answered Mar 17 '11 at 01:39

3

Did you already declare A() somewhere else?

Or, are you calling B.inc twice on accident?

try using: require_once("B.inc");

answered Mar 17 '11 at 01:39

Shackrock

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score 0 · Answer 4 · answered Mar 17 '11 at 01:41

0

Sounds like you might be including B.inc more than once.

// Rather than
include("B.inc");

// Do:
require_once("B.inc");

require_once() allows you to call on a file wherever necessary, but only actually parses it if not already parsed.

answered Mar 17 '11 at 01:41

Michael Berkowski

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score 0 · Answer 5 · answered Mar 17 '11 at 01:42

0

make sure that you require_once ( 'B.inc' ) or `include_once ( 'B.inc' )'

answered Mar 17 '11 at 01:42

bensiu

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score 0 · Answer 6 · answered Mar 17 '11 at 02:24

These people are all right, but rather use php5, autoload, and instead of functions static methods. Object related methods are mostly better but using static methods enables you to reuse a method name in many classes. you can call a static method like this

ClassName::myFunction();

PHP Fatal error: Cannot redeclare function

6 Answers6

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