ZipArchive::statIndex

(PHP 5 >= 5.2.0, PHP 7, PHP 8, PECL zip >= 1.1.0)

ZipArchive::statIndex — Récupère les détails d'une entrée définie par son index

Description

public ZipArchive::statIndex(int $index, int $flags = 0): array|false

Cette fonction obtient des informations d'une entrée définie par son index.

Liste de paramètres

index: Index de l'entrée
flags: ZipArchive::FL_UNCHANGED permet d'obtenir les informations du fichier original de l'archive, ignorant toutes les modifications effectuées

Valeurs de retour

Retourne un tableau contenant les détails de l'entrée ou false si une erreur survient.

Exemples

Exemple #1 Récupère les informations d'une entrée

<?php
$zip = new ZipArchive;
$res = $zip->open('test.zip');
if ($res === TRUE) {
    print_r($zip->statIndex(3));
    $zip->close();
} else {
    echo 'échec, code:' . $res;
}
?>

Résultat de l'exemple ci-dessus est similaire à :

Array
(
    [name] => foobar/baz
    [index] => 3
    [crc] => 499465816
    [size] => 27
    [mtime] => 1123164748
    [comp_size] => 24
    [comp_method] => 8
)

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User Contributed Notes 3 notes

down

eion at robbmob dot com ¶

8 years ago

Note that the 'mtime' field only comes from the DOS-format time that's stored in the zip file, which is only accurate to the nearest 2-seconds.  Zip files can store mtime's in multiple, optional fields but PHP's zip library does not retrieve them (nor does it provide API to access the extra fields)

The end result is that you will see timestamps that could be out by one second (if the original timestamp was odd), and won't necessarily match was other unzip programs will show the mtime as.

down

Chris Lewis ¶

13 years ago

Note that the signed-integer CRC result is only true on 32-bit systems. 64-bit systems return correct CRCs.

A safer way (as recommended by crc32() function page) might be:

if ($file['crc'] < 0)
   $file['crc'] = sprintf("%u",$file['crc']);

down

-4

Anonymous ¶

13 years ago

The CRC returned from this method is a signed number and so can be negative. This isn't how most CRC's are represented and so can cause problems. Another thing to know is that the standerd CRC algorithm used for zip files is CRC32b. 



So to put this together lets say that you wanted to extract the first file from a zip and then compare the original CRC with the CRC for the extracted file this is what you would need to do. (proper error checking is omitted for simplicity). 



<?php

 $zip = new ZipArchive();



 $zip->open("myZip.zip");



 $stat = $zip->statIndex( 0 );



 $name = $stat['name'];



 $oldCrc = $stat['crc'];



 $zip->extractTo("myPath", $name);



 $newCrc = hexdec(hash_file("crc32b", "myPath/" . $name));



 // Have to test both cases as the unsigned CRC from within the zip might appear negative as a signed int. 

 if($newCrc !== $oldCrc && ($oldCrc + 4294967296) !== $newCrc) {

    echo "The files don't match!";

 }

?>

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