©
本文档使用
php.cn手册 发布
(PECL CUBRID >= 8.4.1)
cubrid_lob2_read — Read from BLOB/CLOB data.
$lob_identifier
, int $len
)
The cubrid_lob2_read() function reads len
bytes from the
LOB data and returns the bytes read.
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.
Returns the contents as a string.
FALSE
when there is no more data.
NULL on failure.
Example #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 );
?>
Example #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 );
?>