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(PHP 5)
ibase_blob_get — Get len bytes data from open blob
$blob_handle
, int $len
)
This function returns at most len
bytes from a BLOB
that has been opened for reading by ibase_blob_open() .
Note:
It is not possible to read from a BLOB that has been opened for writing by ibase_blob_create() .
blob_handle
A BLOB handle opened with ibase_blob_open() .
len
Size of returned data.
Returns at most len
bytes from the BLOB, or FALSE
on failure.
Example #1 ibase_blob_get() example
<?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 ]);
?>
[#1] trinite at trinite dot mine dot nu [2005-12-29 03:33:03]
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);
$blobinfo = ibase_blob_info($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 ;)
[#2] hamacker [2004-11-24 06:03:30]
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);
?>
[#3] sol at nospam dot example dot com [2003-03-18 10:59:54]
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;
}
}