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  • fbsql_read_clob()

    (PHP 4 >= 4.2.0, PHP 5, PHP 7)

    Read a CLOB from the database

    说明

    fbsql_read_clob(string $clob_handle[,resource $link_identifier]): string

    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.

    参数

    $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。

    返回值

    Returns a string containing the specified CLOB data.

    范例

    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);
    ?>
    

    参见

    上篇:fbsql_read_blob()

    下篇:fbsql_result()