OCI8 函数
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OCI-Lob::load

(PHP 5, PECL OCI8 >= 1.1.0)

OCI-Lob::load — Returns large object's contents

说明

string OCI-Lob::load ( void )

Returns large object's contents. As script execution is terminated when the memory_limit is reached, ensure that the LOB does not exceed this limit. In most cases it's recommended to use OCI-Lob::read instead.

返回值

Returns the contents of the object, or FALSE on errors.

参见

OCI8 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: Returns large object's contents

用户评论:

pablo dot casado at layers dot com (03-Feb-2010 04:09)

Reading a OCI-Lob by using the load() function will return only 2k chars, so you miss part of its contents.

For example:
<?php

$sql = "BEGIN :res := getACLOB(id).getclobval(); END;";             
$stmt = oci_parse($conn, $sql);
$resVal = OCINewDescriptor($conn, OCI_D_LOB);
oci_bind_by_name($stmt, ":res", $resVal, -1, OCI_B_CLOB);
oci_execute($stmt);

$foo = $resVal->load();
// $foo will contain only 2k chars

// the following will neither work
$foo = $resVal->read( $resVal->size() );
// $foo will contain only 2k chars

?>

Use this instead:

<?php

$sql = "BEGIN :res := getACLOB(id).getclobval(); END;";             
$stmt = oci_parse($conn, $sql);
$resVal = OCINewDescriptor($conn, OCI_D_LOB);
oci_bind_by_name($stmt, ":res", $resVal, -1, OCI_B_CLOB);
oci_execute($stmt);

$foo = "";
                   
while(!$resVal->eof()){
    $foo .= $resVal->read(2000);
}                   
// $foo will contain full contents of the CLOB
?>

FaLL3N at mail dot ru (25-Dec-2006 01:49)

Ps. To prevent IE errors like 'File not found!' after downloading file from db I recommend to add next two lines into header:
header('Cache-Control: max-age=0');
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");

With this, IE will open any file normally :)

FaLL3N at mail dot ru (25-Oct-2006 02:34)

I'll give you example how to download a file from db without storing it on server's FS:
It works like this - point yor browser to index.php?name=file.ext
Just make sure that file "file.ext" exists in your db!

Code:

<?php

 $dbConnection=ocilogon('user','pass','data.world'); //login stuff
 $sql_SelectBlob='select document_body,filename from tdocuments where id=1'; //selecting a blob field named 'document_body' with id = 1
 $statement=OCIParse($dbConnection,$sql_SelectBlob);

 OCIExecute($statement) or die($sql_SelectBlob.'<hr>');

if(OCIFetch($statement)) //if file exists
 {
 $a=OCIResult($statement,"DOCUMENT_BODY");
 }
header('Content-type: application/octet-stream;');
header('Content-disposition: attachment;filename='.$_GET['name']);

print $a->load();
//browser promts to save or open the file
?>

Have fun!