(PECL uopz >= 1.0.0)
uopz_rename — Rename a function at runtime
$class
   , string $function
   , string $rename
   )$function
   , string $rename
   )
 Renames function to rename
  
Note:
If both functions exist, this effectively swaps their names
classThe name of the class containing the function
functionThe name of an existing function
renameThe new name for the function
Example #1 uopz_rename() example
<?php
uopz_rename("strlen", "original_strlen");
echo original_strlen("Hello World");
?>
The above example will output something similar to:
11
Example #2 uopz_rename() class example
<?php
class My {
    public function strlen($arg) {
        return strlen($arg);
    }
}
uopz_rename(My::class, "strlen", "original_strlen");
echo My::original_strlen("Hello World");
?>
The above example will output something similar to:
11