if else if condition not working properly - php

Question

Test.php
<?php
$a = 'D:/mydomain/Slim/Lib/Table.php';
$b = '\Slim\Lib\Table';
foreach (array($a, $b) as $value)
{
if (file_exists($value))
{
echo "file_exist";
include_once($value);
new Table();
}
else if (class_exists($value))
{
echo "class_exist";
$class = new $value();
}
else
{
echo "error";
}
}
?>
and D:/mydomain/Slim/Lib/Table.php
<?php
class Table {
function hello()
{
echo "test";
}
function justTest()
{
echo "just test";
}
}
?>
When im execute test.php in browser the output result is:
file_exist
Fatal error: Cannot redeclare class Table in D:/mydomain/Slim/Lib/Table.php on line 2
if statement for class_exist is not trigger. namespace \Slim\Lib\Table is never exist.

Answer 1

The second, optional, parameter of class_exists is bool $autoload = true, so it tries to autoload this class. Try to change this call to class_exists( $value, false) See the manual.

Answer 2

The first if can be changed to:
if(!class_exists($value) && file_exists($file)
actually there are other problems:
$a = 'D:/mydomain/Slim/Lib/Table.php';
$b = 'Table'; //Since you don't have a namespace in the Table class...
//This ensures that the class and table are a pair and not checked twice
foreach (array($a=>$b) as $file=>$value)
{
if (!class_exists($value) && file_exists($file))
{
echo "file_exist";
include_once($file);
$class = new $value();
}
else if (class_exists($value))
{
echo "class_exist";
$class = new $value();
}
else
{
echo "error";
}
}