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(PHP 4 >= 4.2.0, PHP 5, PHP 7)
fbsql_read_clob — Read a CLOB from the database
$clob_handle
[, resource $link_identifier
] )Reads CLOB data from the database.
If a select statement contains BLOB and/or CLOB columns FrontBase will return the data directly when data is fetched. This default behavior can be changed with fbsql_set_lob_mode() so the fetch functions will return handles to BLOB and CLOB data. If a handle is fetched a user must call fbsql_read_clob() to get the actual CLOB data from the database.
clob_handle
A CLOB handle, returned by fbsql_create_clob() .
link_identifier
由 fbsql_connect() 或 fbsql_pconnect() 返回的 FrontBase 链接标识符.
如可选并未指定,函数会尝试查找一个到 FrontBase 服务器的开放链接,且如没有找到这样的链接,会尝试通过不带参数调用 fbsql_connect() 来创建一个。
Returns a string containing the specified CLOB data.
Example #1 fbsql_read_clob() example
<?php
$link = fbsql_pconnect ( "localhost" , "_SYSTEM" , "secret" )
or die( "Could not connect" );
$sql = "SELECT CLOB_COLUMN FROM CLOB_TABLE;" ;
$rs = fbsql_query ( $sql , $link );
$row_data = fbsql_fetch_row ( $rs );
// $row_data[0] will now contain the clob data for the first row
fbsql_free_result ( $rs );
$rs = fbsql_query ( $sql , $link );
fbsql_set_lob_mode ( $rs , FBSQL_LOB_HANDLE );
$row_data = fbsql_fetch_row ( $rs );
// $row_data[0] will now contain a handle to the CLOB data in the first row
$clob_data = fbsql_read_clob ( $row_data [ 0 ]);
fbsql_free_result ( $rs );
?>