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<?php
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// Connect
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$link = mysql_connect($_ENV["DB_PORT_3306_TCP_ADDR"], $_ENV["DB_ENV_MYSQL_USER"], $_ENV["DB_ENV_MYSQL_PASSWORD"]) OR die(mysql_error());
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mysql_select_db($_ENV["MYSQL_ENV_MYSQL_DATABASE"], $link);
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// Query
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$lastname  = "O'Reilly";
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$_lastname = mysql_real_escape_string($lastname, $link);
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if ( isset($_GET['insert']) ) {
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	mysql_query ( sprintf("INSERT INTO comments (`comment`) VALUES ('%s')", $_lastname) , $link );
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}
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$query = "SELECT * FROM comments WHERE comment LIKE '%$_lastname%'";
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echo '<pre>';
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var_dump($_lastname);
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var_dump($query);
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$result = mysql_query($query, $link);
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if (!$result) {
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    $message  = 'Invalid query: ' . mysql_error() . "\n";
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    $message .= 'Whole query: ' . $query;
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    die($message);
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}
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while ($row = mysql_fetch_assoc($result)) {
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    var_dump($row);
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}