PHP Manual: dbx_sort


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dbx_sort

(PHP 4 >= 4.0.6, PHP 5 <= 5.0.4)

dbx_sort --  Sort a result from a dbx_query by a custom sort function

Description

bool dbx_sort ( object result, string user_compare_function )

Sort a result from a dbx_query() call with a custom sort function.

Parameters

result

A result set returned by dbx_query().

user_compare_function

The user-defined comparison function. It must accept two arguments and return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second.

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example 1. dbx_sort() example

<?php
function user_re_order($a, $b)
{
    
$rv = dbx_compare($a, $b, "parentid", DBX_CMP_DESC);
    if (!
$rv) {
        
$rv = dbx_compare($a, $b, "id", DBX_CMP_NUMBER);
    }
    return
$rv;
}

$link   = dbx_connect(DBX_ODBC, "", "db", "username", "password")
    or die(
"Could not connect");

$result = dbx_query($link, "SELECT id, parentid, description FROM tbl ORDER BY id");
    
// data in $result is now ordered by id

dbx_sort($result, "user_re_order");
    
// data in $result is now ordered by parentid (descending), then by id

dbx_close($link);
?>

Notes

Note: It is always better to use ORDER BY SQL clause instead of dbx_sort() if possible.

See Also

dbx_compare()