fbsql_query
(PHP 4 >= 4.0.6, PHP 5 < 5.3.0)
fbsql_query — Send a FrontBase query
Descrierea
$query
, resource $link_identifier = ?
, int $batch_size = ?
) : resource
Sends a query to the currently active database on
the server.
If 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.
Parametri
-
query -
The SQL query to be executed.
Notă:
The query string shall always end with a semicolon.
-
link_identifier -
Un identificator de legătură FrontBase întors de fbsql_connect() sau fbsql_pconnect ().
Dacă nu este specificat, funcția va încerca să găsească o legătură deschisă către serverul FrontBase și dacă nu este găsită nici o astfel de legătură, se va încerca crearea uneia, ca și la apelarea fbsql_connect() fără argumente.
-
batch_size -
Valorile întoarse
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.
For SELECT statements, fbsql_query() returns a new result identifier that you can pass to fbsql_result().
fbsql_query() will also fail and return false if you
don't have permission to access the table(s) referenced by the query.
Exemple
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");
?>
A se vedea și
- fbsql_affected_rows() - Get number of affected rows in previous FrontBase operation
- fbsql_db_query() - Send a FrontBase query
- fbsql_free_result() - Free result memory
- fbsql_result() - Get result data
- fbsql_select_db() - Select a FrontBase database
- fbsql_connect() - Open a connection to a FrontBase Server
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