The fatal error above will appear if your code contains two or more PHP functions that have the exact same name.
PHP Fatal error: Cannot redeclare function_name() (previously declared in /path/to/domain.com/file.php:12) in /path/to/domain.com/another_included_file.php on line 73
Check if the function name has already been used.
If you find yourself in a situation where the function name may or may not exist, then you can check to see if the name of the function has already been defined.
function function_name(){
//do something
}
if(!function_exists('function_name')){
function function_name(){
//do something
}
}
In the code snippet above, I used the function_exists function to check if function_name already exists as a function. Because it does exist in the example above, the second function is never created.