Cannot redeclare class Excel error in Codeigniter / PHPExcel

Question

I want to export some data in an Excel file, I got This error.

A PHP Error was encountered Severity: Compile Error

Message: Cannot redeclare class Excel

Filename: libraries/EXcel.php

Line Number: 9

I try some way but no one works in my case. like 1 2

This is my EXcel.php codes

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');

require_once APPPATH."third_party/PHPExcel/PHPExcel.php";
// var_dump(get_declared_classes());
class Excel extends PHPExcel {
    public function __construct() {
        parent::__construct();
    }
}
?>

what is wrong, thanks.

and this is my Var_dump result:

array (size=205)
  0 => string 'stdClass' (length=8)
  1 => string 'Exception' (length=9)
  2 => string 'ErrorException' (length=14)
  3 => string 'Closure' (length=7)
  4 => string 'Generator' (length=9)
  5 => string 'DateTime' (length=8)
  6 => string 'DateTimeImmutable' (length=17)
  7 => string 'DateTimeZone' (length=12)
  8 => string 'DateInterval' (length=12)
  9 => string 'DatePeriod' (length=10)
  10 => string 'LogicException' (length=14)
  11 => string 'BadFunctionCallException' (length=24)
  12 => string 'BadMethodCallException' (length=22)
  13 => string 'DomainException' (length=15)
  14 => string 'InvalidArgumentException' (length=24)
  15 => string 'LengthException' (length=15)
  16 => string 'OutOfRangeException' (length=19)
  17 => string 'RuntimeException' (length=16)
  18 => string 'OutOfBoundsException' (length=20)
  19 => string 'OverflowException' (length=17)
  20 => string 'RangeException' (length=14)
  21 => string 'UnderflowException' (length=18)
  22 => string 'UnexpectedValueException' (length=24)
  23 => string 'RecursiveIteratorIterator' (length=25)
  24 => string 'IteratorIterator' (length=16)
  25 => string 'FilterIterator' (length=14)
  26 => string 'RecursiveFilterIterator' (length=23)
  27 => string 'CallbackFilterIterator' (length=22)
  28 => string 'RecursiveCallbackFilterIterator' (length=31)
  29 => string 'ParentIterator' (length=14)
  30 => string 'LimitIterator' (length=13)
  31 => string 'CachingIterator' (length=15)
  32 => string 'RecursiveCachingIterator' (length=24)
  33 => string 'NoRewindIterator' (length=16)
  34 => string 'AppendIterator' (length=14)
  35 => string 'InfiniteIterator' (length=16)
  36 => string 'RegexIterator' (length=13)
  37 => string 'RecursiveRegexIterator' (length=22)
  38 => string 'EmptyIterator' (length=13)
  39 => string 'RecursiveTreeIterator' (length=21)
  40 => string 'ArrayObject' (length=11)
  41 => string 'ArrayIterator' (length=13)
  42 => string 'RecursiveArrayIterator' (length=22)
  43 => string 'SplFileInfo' (length=11)
  44 => string 'DirectoryIterator' (length=17)
  45 => string 'FilesystemIterator' (length=18)
  46 => string 'RecursiveDirectoryIterator' (length=26)
  47 => string 'GlobIterator' (length=12)
  48 => string 'SplFileObject' (length=13)
  49 => string 'SplTempFileObject' (length=17)
  50 => string 'SplDoublyLinkedList' (length=19)
  51 => string 'SplQueue' (length=8)
  52 => string 'SplStack' (length=8)
  53 => string 'SplHeap' (length=7)
  54 => string 'SplMinHeap' (length=10)
  55 => string 'SplMaxHeap' (length=10)
  56 => string 'SplPriorityQueue' (length=16)
  57 => string 'SplFixedArray' (length=13)
  58 => string 'SplObjectStorage' (length=16)
  59 => string 'MultipleIterator' (length=16)
  60 => string 'ReflectionException' (length=19)
  61 => string 'Reflection' (length=10)
  62 => string 'ReflectionFunctionAbstract' (length=26)
  63 => string 'ReflectionFunction' (length=18)
  64 => string 'ReflectionParameter' (length=19)
  65 => string 'ReflectionMethod' (length=16)
  66 => string 'ReflectionClass' (length=15)
  67 => string 'ReflectionObject' (length=16)
  68 => string 'ReflectionProperty' (length=18)
  69 => string 'ReflectionExtension' (length=19)
  70 => string 'ReflectionZendExtension' (length=23)
  71 => string 'SessionHandler' (length=14)
  72 => string '__PHP_Incomplete_Class' (length=22)
  73 => string 'php_user_filter' (length=15)
  74 => string 'Directory' (length=9)
  75 => string 'ZipArchive' (length=10)
  76 => string 'LibXMLError' (length=11)
  77 => string 'DOMException' (length=12)
  78 => string 'DOMStringList' (length=13)
  79 => string 'DOMNameList' (length=11)
  80 => string 'DOMImplementationList' (length=21)
  81 => string 'DOMImplementationSource' (length=23)
  82 => string 'DOMImplementation' (length=17)
  83 => string 'DOMNode' (length=7)
  84 => string 'DOMNameSpaceNode' (length=16)
  85 => string 'DOMDocumentFragment' (length=19)
  86 => string 'DOMDocument' (length=11)
  87 => string 'DOMNodeList' (length=11)
  88 => string 'DOMNamedNodeMap' (length=15)
  89 => string 'DOMCharacterData' (length=16)
  90 => string 'DOMAttr' (length=7)
  91 => string 'DOMElement' (length=10)
  92 => string 'DOMText' (length=7)
  93 => string 'DOMComment' (length=10)
  94 => string 'DOMTypeinfo' (length=11)
  95 => string 'DOMUserDataHandler' (length=18)
  96 => string 'DOMDomError' (length=11)
  97 => string 'DOMErrorHandler' (length=15)
  98 => string 'DOMLocator' (length=10)
  99 => string 'DOMConfiguration' (length=16)
  100 => string 'DOMCdataSection' (length=15)
  101 => string 'DOMDocumentType' (length=15)
  102 => string 'DOMNotation' (length=11)
  103 => string 'DOMEntity' (length=9)
  104 => string 'DOMEntityReference' (length=18)
  105 => string 'DOMProcessingInstruction' (length=24)
  106 => string 'DOMStringExtend' (length=15)
  107 => string 'DOMXPath' (length=8)
  108 => string 'PDOException' (length=12)
  109 => string 'PDO' (length=3)
  110 => string 'PDOStatement' (length=12)
  111 => string 'PDORow' (length=6)
  112 => string 'SimpleXMLElement' (length=16)
  113 => string 'SimpleXMLIterator' (length=17)
  114 => string 'XMLReader' (length=9)
  115 => string 'XMLWriter' (length=9)
  116 => string 'CURLFile' (length=8)
  117 => string 'COMPersistHelper' (length=16)
  118 => string 'com_exception' (length=13)
  119 => string 'com_safearray_proxy' (length=19)
  120 => string 'variant' (length=7)
  121 => string 'com' (length=3)
  122 => string 'dotnet' (length=6)
  123 => string 'finfo' (length=5)
  124 => string 'GMP' (length=3)
  125 => string 'Collator' (length=8)
  126 => string 'NumberFormatter' (length=15)
  127 => string 'Normalizer' (length=10)
  more elements...

You should look into autoloading instead of manually including the classes you need. Check http://php.net/manual/en/language.oop5.autoload.php or use for example Composer's autoloader. — jeroen, Jan 11 '19 at 08:00

score 2 · Accepted Answer · edited Jan 14 '19 at 07:47

2

The Excel class is already declared in your project.

Please change your file name and class name of controller to something different. I hope this will solve your problem.

edited Jan 14 '19 at 07:47

Krzysztof Raciniewski

4,735
3
21
42

answered Jan 12 '19 at 09:33

Sandeep K.

759
6
18

thanks so much, I have two file by the same name but in the different location of my project I change one of them and it fixes my problem – Nasser Ali Karimi Jan 13 '19 at 07:20
@vNasser Ali Karimi Welcome! – Sandeep K. Jan 14 '19 at 04:52

score 1 · Answer 2 · edited Jun 20 '20 at 09:12

source: Bryan Hazelbaker

Depending on your OS, and how you have constructed the path to your document root, there may be an issue with capitals versus lower case letters in the path name.

rename the file from EXcel.php to excel.php (i.e. use lower case)
ensure to always use require_once (i.e. require_once /path/to/excel.php)
at last you could test above with print_r(get_declared_classes()); (which could show you that the first include is from autoload)

Cannot redeclare class Excel error in Codeigniter / PHPExcel

2 Answers2