*   int ereg ( string $pattern , string $string [, array &$regs ] )  =>  int preg_match ( string $pattern , string $subject [, array &$matches [, int $flags = 0 [, int $offset = 0 ]]] )
*  string ereg_replace ( string $pattern , string $replacement , string $string )  =>  mixed preg_replace ( mixed $pattern , mixed $replacement , mixed $subject [, int $limit = -1 [, int &$count ]] )
*  int eregi ( string $pattern , string $string [, array &$regs ] )  =>  int preg_match ( string $pattern , string $subject [, array &$matches [, int $flags = 0 [, int $offset = 0 ]]] )
*  string eregi_replace ( string $pattern , string $replacement , string $string )  => mixed preg_replace ( mixed $pattern , mixed $replacement , mixed $subject [, int $limit = -1 [, int &$count ]] )
* set_magic_quotes_runtime() DEPRECIATED
* array split ( string $pattern , string $string [, int $limit = -1 ] )  =>  array preg_split ( string $pattern , string $subject [, int $limit = -1 [, int $flags = 0 ]] )
* string mysql_escape_string ( string $unescaped_string )  =>  string mysql_real_escape_string ( string $unescaped_string [, resource $link_identifier = NULL ] )  BOTH DEPRECIATED IN PHP 7.0