(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:
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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:
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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().
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