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MySQL extension overview example

This simple example shows how to connect, execute a query, print resulting rows and disconnect from a MySQL database.

Example #1 MySQL extension overview example

<?php
// Connecting, selecting database
$link = mysql_connect('mysql_host', 'mysql_user', 'mysql_password')
    or die('Could not connect: ' . mysql_error());
echo 'Connected successfully';
mysql_select_db('my_database') or die('Could not select database');

// Performing SQL query
$query = 'SELECT * FROM my_table';
$result = mysql_query($query) or die('Query failed: ' . mysql_error());

// Printing results in HTML
echo "<table>\n";
while ($line = mysql_fetch_array($result, MYSQL_ASSOC)) {
    echo "\t<tr>\n";
    foreach ($line as $col_value) {
        echo "\t\t<td>$col_value</td>\n";
    }
    echo "\t</tr>\n";
}
echo "</table>\n";

// Free resultset
mysql_free_result($result);

// Closing connection
mysql_close($link);
?>

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PHP手册 - N: MySQL extension overview example

用户评论:

Sz.abi (19-Feb-2009 11:26)

You might want to do something like this to output the column names as well:

<?php
echo "<table border=\"1\">\n";
$line = mysql_fetch_array($result, MYSQL_ASSOC);
    echo "\t<tr>\n";
        echo "\t\t<th>#</th>\n";
    foreach (array_keys($line) as $col_value) {
        echo "\t\t<th>$col_value</th>\n";
    }
    echo "\t</tr>\n";
$i=0;
do  {
    echo "\t<tr>\n";
    $i++;
    echo "\t\t<th>$i</th>\n";
    foreach ($line as $col_value) {
        echo "\t\t<td>$col_value</td>\n";
    }
    echo "\t</tr>\n";
}while ($line = mysql_fetch_array($result, MYSQL_ASSOC));
echo "</table>\n";
?>

(Ok, here I also added line numbers; the main point of this post is using array_keys(...) to display the column names, and using a do {...} while (...); construct to read the first line only once).