API15:JDatabaseMySQLi/explain

Description

Diagnostic function

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Syntax

explain()

Returns

string

Defined in

libraries/joomla/database/database/mysqli.php

Importing

jimport( 'joomla.database.database.mysqli' );

Source Body

function explain()
{
        $temp = $this->_sql;
        $this->_sql = "EXPLAIN $this->_sql";

        if (!($cur = $this->query())) {
                return null;
        }
        $first = true;

        $buffer = '<table id="explain-sql">';
        $buffer .= '<thead><tr><td colspan="99">'.$this->getQuery().'</td></tr>';
        while ($row = mysqli_fetch_assoc( $cur )) {
                if ($first) {
                        $buffer .= '<tr>';
                        foreach ($row as $k=>$v) {
                                $buffer .= '<th>'.$k.'</th>';
                        }
                        $buffer .= '</tr>';
                        $first = false;
                }
                $buffer .= '</thead><tbody><tr>';
                foreach ($row as $k=>$v) {
                        $buffer .= '<td>'.$v.'</td>';
                }
                $buffer .= '</tr>';
        }
        $buffer .= '</tbody></table>';
        mysqli_free_result( $cur );

        $this->_sql = $temp;

        return $buffer;
}

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