## 例

`

     mixed print_r ( mixed $expression [, bool $return = false ] )

`

## 説明

print_r() displays information about a variable in a way that's readable by humans. print_r(), var_dump() and var_export() will also show protected and private properties of objects with PHP 5. Static class members will not be shown. Remember that print_r() will move the array pointer to the end. Use reset() to bring it back to beginning.

## 戻り値

If given a string, integer or float, the value itself will be printed. If given an array, values will be presented in a format that shows keys and elements. Similar notation is used for objects. When the return parameter is TRUE, this function will return a string. Otherwise, the return value is TRUE.