Description
resource
fbsql_query ( string query [, resource link_identifier [, int batch_size]] )
fbsql_query() sends a query to the currently
active database on the server that's associated with the
specified link identifier. If
link_identifier isn't specified, the last
opened link is assumed. If no link is open, the function tries
to establish a link as if fbsql_connect() was
called with no arguments, and use it.
Note:
The query string shall always end with a semicolon.
fbsql_query() returns TRUE (non-zero) or FALSE
to indicate whether or not the query succeeded. A return value
of TRUE means that the query was legal and could be executed by
the server. It does not indicate anything about the number of
rows affected or returned. It is perfectly possible for a query
to succeed but affect no rows or return no rows.
The following query is syntactically invalid, so
fbsql_query() fails and returns FALSE:
Example 1. fbsql_query() example
<?php
$result = fbsql_query("SELECT * WHERE 1=1")
or die ("Invalid query");
?>
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The following query is semantically invalid if
my_col is not a column in the table
my_tbl, so fbsql_query()
fails and returns FALSE:
Example 2. fbsql_query() example
<?php
$result = fbsql_query ("SELECT my_col FROM my_tbl")
or die ("Invalid query");
?>
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|
fbsql_query() will also fail and return
FALSE if you don't have permission to access the table(s)
referenced by the query.
Assuming the query succeeds, you can call
fbsql_num_rows() to find out how many rows
were returned for a SELECT statement or
fbsql_affected_rows() to find out how many
rows were affected by a DELETE, INSERT, REPLACE, or UPDATE
statement.
For SELECT statements, fbsql_query() returns a
new result identifier that you can pass to
fbsql_result(). When you are done with the
result set, you can free the resources associated with it by
calling fbsql_free_result(). Although, the
memory will automatically be freed at the end of the script's
execution.
See also: fbsql_affected_rows(),
fbsql_db_query(),
fbsql_free_result(),
fbsql_result(),
fbsql_select_db(), and
fbsql_connect().
