Retrieve the external attributes of an entry defined by its index

# ZipArchive::getExternalAttributesIndex

(PHP 5 >= 5.6.0, PHP 7, PHP 8, PECL zip >= 1.12.4)

ZipArchive::getExternalAttributesIndex — Retrieve the external attributes of an entry defined by its index

### 说明

public function ZipArchive::getExternalAttributesIndex(
int `$index`,
int `&$opsys`,
int `&$attr`,
int `$flags` = 0
): bool

Retrieve the external attributes of an entry defined by its index.

### 参数

`index`
  Index of the entry.
`opsys`
  On success, receive the operating system code defined by one of the ZipArchive::OPSYS_ constants.
`attr`
  On success, receive the external attributes. Value depends on operating system.
`flags`
  If flags is set to `ZipArchive::FL_UNCHANGED`, the original unchanged attributes are returned.

### 返回值

成功时返回 `true`， 或者在失败时返回 `false`。

### 示例

This example extract all the entries of a ZIP archive test.zip and set the Unix rights from external attributes.

示例 #1 Extract all entries with Unix rights

    <?php
    $zip = new ZipArchive();
    if ($zip->open('test.zip') === TRUE) {
        for ($idx=0 ; $s = $zip->statIndex($idx) ; $idx++) {
            if ($zip->extractTo('.', $s['name'])) {
                if ($zip->getExternalAttributesIndex($idx, $opsys, $attr)
                    && $opsys==ZipArchive::OPSYS_UNIX) {
                   chmod($s['name'], ($attr >> 16) & 0777);
                }
            }
        }
        $zip->close();
        echo "Ok\n";
    } else {
        echo "KO\n";
    }
    ?>

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