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How Can I Replace the mysql_result() Function When Migrating from MySQL to MySQLi?

Mary-Kate Olsen
Release: 2024-11-24 07:07:11
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How Can I Replace the mysql_result() Function When Migrating from MySQL to MySQLi?

PHP Scripting: Migrating to MySQLi from MySql – Dealing with the Absence of mysql_result()

In transitioning old PHP code from MySQL to MySQLi, developers may encounter the absence of the mysql_result() function. This can pose a challenge, particularly when working with limited result sets.

The mysql_result() function, although inefficient for large datasets, offered simplicity when extracting a singular value from a single row and field. However, MySQLi lacks a direct equivalent function.

To overcome this inconvenience, a customized function has been developed to emulate the functionality of mysql_result() within the MySQLi environment. This function, mysqli_result(), replicates the behavior of its predecessor, returning false if the request is out of bounds. It accepts a row parameter that defaults to 0 and also allows for column specification by numerical offset or field name.

Here's the code for the mysqli_result() function:

function mysqli_result($res,$row=0,$col=0){ 
    $numrows = mysqli_num_rows($res); 
    if ($numrows &amp;&amp; $row <= ($numrows-1) &amp;&amp; $row >=0){
        mysqli_data_seek($res,$row);
        $resrow = (is_numeric($col)) ? mysqli_fetch_row($res) : mysqli_fetch_assoc($res);
        if (isset($resrow[$col])){
            return $resrow[$col];
        }
    }
    return false;
}
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Utilizing this function, developers can efficiently extract specific values from their MySQLi results, enhancing the portability of their code and simplifying their transition from MySQL.

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source:php.cn
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