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PHP : Function Reference : FrontBase Functions : fbsql_read_blob

fbsql_read_blob

Read a BLOB from the database (PHP 4 >= 4.2.0, PHP 5)
string fbsql_read_blob ( string blob_handle [, resource link_identifier] )

Reads BLOB 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_blob() to get the actual BLOB data from the database.

Parameters

blob_handle

A BLOB handle, returned by fbsql_create_blob().

link_identifier

A FrontBase link identifier returned by fbsql_connect() or fbsql_pconnect().

If optional and not specified, the function will try to find an open link to the FrontBase server and if no such link is found it will try to create one as if fbsql_connect() was called with no arguments

Return Values

Returns a string containing the specified BLOB data.

Examples

Example 712. fbsql_read_blob() example

<?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);
// $row_data[0] will now contain the blob data for the first row
fbsql_free_result($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 BLOB data in the first row
$blob_data = fbsql_read_blob($row_data[0]);
fbsql_free_result($rs);

?>


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fbsql_affected_rows
fbsql_autocommit
fbsql_blob_size
fbsql_change_user
fbsql_clob_size
fbsql_close
fbsql_commit
fbsql_connect
fbsql_create_blob
fbsql_create_clob
fbsql_create_db
fbsql_data_seek
fbsql_database_password
fbsql_database
fbsql_db_query
fbsql_db_status
fbsql_drop_db
fbsql_errno
fbsql_error
fbsql_fetch_array
fbsql_fetch_assoc
fbsql_fetch_field
fbsql_fetch_lengths
fbsql_fetch_object
fbsql_fetch_row
fbsql_field_flags
fbsql_field_len
fbsql_field_name
fbsql_field_seek
fbsql_field_table
fbsql_field_type
fbsql_free_result
fbsql_get_autostart_info
fbsql_hostname
fbsql_insert_id
fbsql_list_dbs
fbsql_list_fields
fbsql_list_tables
fbsql_next_result
fbsql_num_fields
fbsql_num_rows
fbsql_password
fbsql_pconnect
fbsql_query
fbsql_read_blob
fbsql_read_clob
fbsql_result
fbsql_rollback
fbsql_rows_fetched
fbsql_select_db
fbsql_set_characterset
fbsql_set_lob_mode
fbsql_set_password
fbsql_set_transaction
fbsql_start_db
fbsql_stop_db
fbsql_table_name
fbsql_tablename
fbsql_username
fbsql_warnings
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