fbsql_query
(PHP 4 >= 4.0.6)
fbsql_query -- Send a FrontBase query
Description
resource fbsql_query ( string query [, resource link_identifier])
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");
?>
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");
?>
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().
