private function wrap($value) {

		if (strpos(strtolower($value), 'null') !== false) {
			return $value;
		}

		// If the value being wrapped has a column alias we will need to separate out
		// the pieces so we can wrap each of the segments of the expression on it
		// own, and then joins them both back together with the "as" connector.
		if (strpos(strtolower($value), ' as ') !== false) {
			$segments = explode(' ', $value);

			return $this->wrap($segments[0]).' as '.$this->wrapValue($segments[2]);
		}
	
		$wrapped = array();
	
		$segments = explode('.', $value);
	
		// If the value is not an aliased table expression, we'll just wrap it like
		// normal, so if there is more than one segment, we will wrap the first
		// segments as if it was a table and the rest as just regular values.
		foreach ($segments as $key => $segment) {
			$wrapped[] = $this->wrapValue($segment);
		}
	
		return implode('.', $wrapped);
	}
private function wrap($value) {

		if (strpos(strtolower($value), 'null') !== false) {
			return $value;
		}

		// If the value being wrapped has a column alias we will need to separate out
		// the pieces so we can wrap each of the segments of the expression on it
		// own, and then joins them both back together with the "as" connector.
		if (strpos(strtolower($value), ' as ') !== false) {
			$segments = explode(' ', $value);

			return $this->wrap($segments[0]).' as '.$this->wrapValue($segments[2]);
		}
	
		$wrapped = array();
	
		$segments = explode('.', $value);
	
		// If the value is not an aliased table expression, we'll just wrap it like
		// normal, so if there is more than one segment, we will wrap the first
		// segments as if it was a table and the rest as just regular values.
		foreach ($segments as $key => $segment) {
			$wrapped[] = $this->wrapValue($segment);
		}
	
		return implode('.', $wrapped);
	}
private function wrap ( $ value ) { if ( strpos ( strtolower ( $ value ) , 'null' ) !== false ) { return $ value ; } // If the value being wrapped has a column alias we will need to separate out // the pieces so we can wrap each of the segments of the expression on it // own, and then joins them both back together with the "as" connector. if ( strpos ( strtolower ( $ value ) , ' as ' ) !== false ) { $ segments = explode ( ' ' , $ value ) ; return $ this -> wrap ( $ segments [ 0 ] ) . ' as ' . $ this -> wrapValue ( $ segments [ 2 ] ) ; } $ wrapped = array ( ) ; $ segments = explode ( '.' , $ value ) ; // If the value is not an aliased table expression, we'll just wrap it like // normal, so if there is more than one segment, we will wrap the first // segments as if it was a table and the rest as just regular values. foreach ( $ segments as $ key => $ segment ) { $ wrapped [ ] = $ this -> wrapValue ( $ segment ) ; } return implode ( '.' , $ wrapped ) ; }
Wrap a value in keyword identifiers.

@param  string  $value
@return string
Wrap a value in keyword identifiers .