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# fbsql_read_blob

(PHP 4 >= 4.2.0, PHP 5)

fbsql_read_blob -- データベースからBLOBを読み込む

## 説明

string fbsql_read_blob ( string blob_handle [, resource link_identifier])

返り値: blob_handleで指定したBLOBを含む文字列。

fbsql_read_blob() reads BLOB data from the database. If a select statement contains BLOB and/or BLOB 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_blob() to get the actual BLOB data from the database.

例 1. fbsql_read_blob()の例
`<?php $link = fbsql_pconnect ("localhost", "_SYSTEM", "secret") or die ("Could not connect"); $sql = "SELECT BLOB_COLUMN FROM BLOB_TABLE;"; $rs = fbsql_query($sql, $link); $row_data = fbsql_fetch_row($rs); // $row_data[0] will now contain the blob data for teh first row fbsql_free_result($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 BLOB data in the first row $blob_data = fbsql_read_blob($row_data[0]); fbsql_free_result($rs); ?>`

fbsql_create_blob(), fbsql_read_blob(), fbsql_read_clob(), fbsql_set_lob_mode()も参照下さい。

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