cubrid_lob2_read

Read from BLOB/CLOB data.

Beschreibung

string cubrid_lob2_read ( resource $lob_identifier , int $len )

The cubrid_lob2_read function reads len bytes from the LOB data and returns the bytes read.

Parameter-Liste

lob_identifier: Lob identifier as a result of cubrid_lob2_new or get from the result set.
len: Length from buffer you want to read from the lob data.

Rückgabewerte

Returns the contents as a string.

FALSE when there is no more data.

NULL on failure.

Beispiele

Beispiel #1 cubrid_lob2_read example 1


<?php
// test_lob (id INT, contents CLOB)

$conn = cubrid_connect("localhost", 33000, "demodb", "public", "");

$req = cubrid_execute($conn, "select * from test_lob");

$row = cubrid_fetch_row($req, CUBRID_LOB);

print "position now is " . cubrid_lob2_tell($row[1]) . "\n";

cubrid_lob2_seek($row[1], 10, CUBRID_CURSOR_FIRST);

print "\nposition after moving farword is " . cubrid_lob2_tell($row[1]) . "\n";

$data = cubrid_lob2_read($row[1], 12);

print "\nposition after reading is " . cubrid_lob2_tell($row[1]) . "\n";

print $data . "\n";

cubrid_lob2_seek($row[1], 5, CUBRID_CURSOR_CURRENT);

print "\nposition after moving again is " . cubrid_lob2_tell($row[1]) . "\n";

$data = cubrid_lob2_read($row[1], 20);
print $data . "\n";

cubrid_disconnect($conn);
?>

Beispiel #2 cubrid_lob2_read example 2


<?php
// test_lob (id INT, contents CLOB)

$conn = cubrid_connect("localhost", 33000, "demodb", "dba", "");

$req = cubrid_execute($conn, "select * from test_lob");

$row = cubrid_fetch_row($req, CUBRID_LOB);

while (true) {
    if ($data = cubrid_lob2_read($row[1], 1024)) {
        print $data . "\n";
    }
    elseif ($data === false) {
        print "There is no more data\n";
        break;
    }
    else {
        print "There must some errors\n";
        break;
    }
}

cubrid_disconnect($conn);
?>

Siehe auch

cubrid_lob2_write
cubrid_lob2_seek
cubrid_lob2_seek64
cubrid_lob2_tell
cubrid_lob2_tell64
cubrid_lob2_size
cubrid_lob2_size64