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ibase_blob_get

(PHP 5, PHP 7 < 7.4.0)

ibase_blob_getLit len octets de données dans un BLOB iBase ouvert

Description

ibase_blob_get(resource $blob_handle, int $len): string

ibase_blob_get() retourne au plus len octets du BLOB blob_handle qui a été ouvert en lecture par ibase_blob_open().

Note:

Il n'est pas possible de lire dans un BLOB ouvert en écriture par ibase_blob_create().

Liste de paramètres

blob_handle

Une ressource blob, ouverte avec la fonction ibase_blob_open().

len

La taille des données retournées.

Valeurs de retour

Retourne au plus, len octets du BLOB, ou false si une erreur survient.

Exemples

Exemple #1 Exemple avec ibase_blob_get()

<?php
$result
= ibase_query("SELECT blob_value FROM table");
$data = ibase_fetch_object($result);
$blob_data = ibase_blob_info($data->BLOB_VALUE);
$blob_hndl = ibase_blob_open($data->BLOB_VALUE);
echo
ibase_blob_get($blob_hndl, $blob_data[0]);
?>
Cet exemple ne fait pas plus qu'un ibase_blob_echo( $data->BLOB_VALUE ), mais il montre comment récupérer les informations dans une $variable pour les manipuler comme vous le voulez.

Voir aussi

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User Contributed Notes 3 notes

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4
hamacker
19 years ago
The first example is wrong, is missing ibase_blob_close() function.
The correct example is :
<?php
$sql
= "SELECT blob_value FROM table";
$result = ibase_query($sql);
$data = ibase_fetch_object($result);
$blob_data = ibase_blob_info($data->BLOB_VALUE);
$blob_hndl = ibase_blob_open($data->BLOB_VALUE);
print
ibase_blob_get($blob_hndl, $blob_data[0]);
// without close blob conection, php and ibase_blob_get() do not run.
ibase_blob_close($blob_hndl);
?>
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1
trinite at trinite dot mine dot nu
18 years ago
The ways mentioned above won't work with segmented blobs. To fix this, I use the following:
(btw, $result->MFOTO is an image in the database)

<?php
$result
= ibase_fetch_object($result);

/*
ibase_blob_info array:
[0] bloblength(total)
[1] number of segments
[2] size of largest segment
[3] stream or segmented blob
[4] ??
*/
$blobinfo = ibase_blob_info($result->MFOTO);

$blobhandle = ibase_blob_open($result->MFOTO);
for(
$i = 0; $i < $blobinfo[1]; $i++){
$readsize = $blobinfo[2];
if(
$i == ($blobinfo[1] - 1)){
$readsize = $blobinfo[0] - (($blobinfo[1] - 1) * $blobinfo[2]);
}
$totalimage .= ibase_blob_get($blobhandle, $readsize);
}
ibase_blob_close($blobhandle);
echo
$totalimage;
?>

This should do the trick ;)
up
0
sol at nospam dot example dot com
21 years ago
I found examples like these:

$sql = "SELECT ID, CONTENTTYPE, BLOBSIZE, DATA,NAME ";
$sql.= " FROM OM_BLOB WHERE ID = 42";
$result = ibase_query($sql);
while ($row=ibase_fetch_object($result))
{
$blob_data = ibase_blob_info( $row->DATA);
$blob_hndl = ibase_blob_open($row->DATA);
$image = ibase_blob_get( $blob_hndl, $blob_data[0]);
}
but this won't work for large blobs.

One solution for big blobs is to retrieve them by chunks:

$sql = "SELECT ID, CONTENTTYPE, BLOBSIZE, DATA,NAME ";
$sql.= " FROM OM_BLOB WHERE ID = 42";
$result = ibase_query($sql);
while ($row=ibase_fetch_object($result))
{
$image = ibase_blob_get($blob_hndl,8192);
while($data = ibase_blob_get($blob_hndl, 8192)){
$image .= $data;
}
}
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