# rpm_get_tag

(PECL rpmreader >= 0.1.0)

rpm_get_tag — Retrieves a header tag from an RPM file

### 说明

rpm_get_tag ( resource `$rpmr` , int `$tagnum` ) : mixed

rpm_get_tag() will retrieve a given tag from the RPM file's header and return it.

### 参数

`rpmr`

  A file pointer resource successfully opened by rpm_open().

`tagnum`

  The tag number to retrieve from the RPM header. This value can be specified using the list of constants defined by this module.

### 返回值

The return value can be of various types depending on the `tagnum` supplied to the function.

### 范例

Example #1 rpm_get_tag() example

    <?php

    $file = "/path/to/file.rpm";
    $rpmr = rpm_open($file);

    $name = rpm_get_tag($rpmr, RPMREADER_NAME);
    echo "$name<br>\n";

    rpm_close($rpmr);

    ?>

### 参见

- rpm_open() - Opens an RPM file
- rpm_close() - Closes an RPM file