deprecated:mysql_connect():mysql扩展被弃用，以后将被删除：使用mysqli或PDO[duplicate]

Answer 1

$result = mysqli_query($link, $query); // $link being the connection variable

<?php 
$link = mysql_connect('hostname','dbuser','dbpassword'); 
if (!$link) { 
    die('Could not connect to MySQL: ' . mysql_error()); 
} 
echo 'Connection OK'; mysql_close($link); 
?>

<?php 
$link = mysqli_connect('hostname','dbuser','dbpassword','db_name'); 
if (!$link) { 
    die('Could not connect to MySQL: ' . mysqli_error($link)); 
} 
echo 'Connection OK'; mysqli_close($link); 
?>

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