问题
After I have instaled in my site one script, I have an error:
Fatal error: Cannot redeclare ae_detect_ie() (previously declared in /home/xdesign/public_html/Powerful/config.php:24) in /home/xdesign/public_html/Powerful/config.php on line 29
This is the line:
function ae_detect_ie()
{
if (isset($_SERVER['HTTP_USER_AGENT']) &&
(strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false))
return true;
else
return false;
}
I don't understand what I did wrong!
The site: http://fbswapes.com
The same script is working in another host.
回答1:
Simpily you have declared a function twice.. Example:
Global.Fun.php
<?php
function Do_Something (){
echo "This Does Something";
}
?>
Index.php
<?php
include "Global.Fun.php";
function Do_Something($Arg){
echo "Argument Supplied".$Arg;
}
?>
Notice, I have declared the same function twice, one in my global.fun.php page and again in the index.php page..
If you are in doubt that a function is currently set:
if (function_exists('Do_Something')){
echo "Function Exists";
}else{
echo "Function Not Found, This name Can be used!";
}
来源：https://stackoverflow.com/questions/16431652/cannot-redeclare-a-function-previously-declared