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dbx_query
Send a query and fetch all results (if any)
(PHP 4 >= 4.0.6, PHP 5 <= 5.0.5, PECL dbx:1.1.0)
mixed dbx_query ( object link_identifier, string sql_statement [, int flags] )
Parameters
- link_identifier
The DBX link object returned by dbx_connect()
- sql_statement
SQL statement.
- flags
The compared column
- flags
The flags parameter is used to control the amount of information that is returned. It may be any combination of the following constants with the bitwise OR operator (|). The DBX_COLNAMES_* flags override the dbx.colnames_case setting from
php.ini.-
DBX_RESULT_INDEX It is always set, that is, the returned object has a data property which is a 2 dimensional array indexed numerically. For example, in the expression
data[2][3]2stands for the row (or record) number and3stands for the column (or field) number. The first row and column are indexed at 0.If
DBX_RESULT_ASSOCis also specified, the returning object contains the information related toDBX_RESULT_INFOtoo, even if it was not specified.-
DBX_RESULT_INFO - It provides info about columns, such as field names and field types.
-
DBX_RESULT_ASSOC It effects that the field values can be accessed with the respective column names used as keys to the returned object's data property.
Associated results are actually references to the numerically indexed data, so modifying
data[0][0]causes thatdata[0]['field_name_for_first_column']is modified as well.-
DBX_RESULT_UNBUFFERED(PHP 5) This flag will not create the data property, and the rows property will initially be 0. Use this flag for large datasets, and use dbx_fetch_row() to retrieve the results row by row.
The dbx_fetch_row() function will return rows that are conformant to the flags set with this query. Incidentally, it will also update the rows each time it is called.
-
DBX_COLNAMES_UNCHANGED(available from PHP 4.3.0) - The case of the returned column names will not be changed.
-
DBX_COLNAMES_UPPERCASE(available from PHP 4.3.0) - The case of the returned column names will be changed to uppercase.
-
DBX_COLNAMES_LOWERCASE(available from PHP 4.3.0) - The case of the returned column names will be changed to lowercase.
Note that
DBX_RESULT_INDEXis always used, regardless of the actual value of flags parameter. This means that only the following combinations are effective:-
DBX_RESULT_INDEX -
DBX_RESULT_INDEX|DBX_RESULT_INFO -
DBX_RESULT_INDEX|DBX_RESULT_INFO|DBX_RESULT_ASSOC- this is the default, if flags is not specified.
-
Return Values
dbx_query() returns an object or 1
on success, and 0 on failure. The result object is
returned only if the query given in sql_statement
produces a result set (i.e. a SELECT query, even if the result set is
empty).
The returned object has four or five
properties depending on flags:
- handle
It is a valid handle for the connected database, and as such it can be used in module specific functions (if required).
<?php
$result = dbx_query($link, "SELECT id FROM table");
mysql_field_len($result->handle, 0);
?>- cols and rows
These contain the number of columns (or fields) and rows (or records) respectively.
<?php
$result = dbx_query($link, 'SELECT id FROM table');
echo $result->rows; // number of records
echo $result->cols; // number of fields
?>- info (optional)
It is returned only if either
DBX_RESULT_INFOorDBX_RESULT_ASSOCis specified in the flags parameter. It is a 2 dimensional array, that has two named rows (nameandtype) to retrieve column information.Example 493. lists each field's name and type
<?php
$result = dbx_query($link, 'SELECT id FROM table',
DBX_RESULT_INDEX | DBX_RESULT_INFO);
for ($i = 0; $i < $result->cols; $i++ ) {
echo $result->info['name'][$i] . "\n";
echo $result->info['type'][$i] . "\n";
}
?>- data
This property contains the actual resulting data, possibly associated with column names as well depending on flags. If
DBX_RESULT_ASSOCis set, it is possible to use$result->data[2]["field_name"].Example 494. outputs the content of data property into HTML table
<?php
$result = dbx_query($link, 'SELECT id, parentid, description FROM table');
echo "<table>\n";
foreach ($result->data as $row) {
echo "<tr>\n";
foreach ($row as $field) {
echo "<td>$field</td>";
}
echo "</tr>\n";
}
echo "</table>\n";
?>Example 495. How to handle UNBUFFERED queries
<?php
$result = dbx_query ($link, 'SELECT id, parentid, description FROM table', DBX_RESULT_UNBUFFERED);
echo "<table>\n";
while ($row = dbx_fetch_row($result)) {
echo "<tr>\n";
foreach ($row as $field) {
echo "<td>$field</td>";
}
echo "</tr>\n";
}
echo "</table>\n";
?>
Examples
Example 496. How to handle the returned value
<?php
$link = dbx_connect(DBX_ODBC, "", "db", "username", "password")
or die("Could not connect");
$result = dbx_query($link, 'SELECT id, parentid, description FROM table');
if (is_object($result) ) {
// ... do some stuff here, see detailed examples below ...
// first, print out field names and types
// then, draw a table filled with the returned field values
} else {
exit("Query failed");
}
dbx_close($link);
?>