mysql_query 没有按预期工作

Question

$query = mysql_query("SELECT * FROM joblist WHERE salary LIKE '%$searchq%' OR jobtitle LIKE '%$searchq%'");
$count = mysql_num_rows($query);
if ($count == 0){
    $output = 'There was no search results!';
}else {
    while($row = mysql_fetch_array($query)) {
        $salary = $row['$salary'];
        $jobtitle = $row['$jobtitle'];
        $id = $row['id'];
        $output .= '<div>' .$salary.' '.$jobtitle.'</div>';
    }
}

Fatal error:

Call to undefined function mysql_query() in /srv/http/head.php on line 16

Answer 1

You can use mysqli_* if you are using PHP 7. Because mysql_* is not available in this version. Here is the example that you can use it.

<?php

// procedural style of mysqli

$host = "host";
$user = "user";
$password = "password";
$database = "db";

$link = mysqli_connect($host, $user, $password, $database);

if(!$link){
    echo ('unable to connect to database');
}
else {
$sql = "your select query";
$result = mysqli_query($link,$sql);
    if(mysqli_num_rows($result) == 1){
  // SUCCESS STUFF
}
else {
 // error stuff
}
} // end else

?>

Answer 2

Mysql_* has been depreciated from PHP 7.0 and onwards. Please use mysqli_*. Or else downgrade your PHP version to 5.6 or lower. It will work fine. https://www.php.net/manual/en/function.mysql-connect.php ( see the waning section of this page).

Answer 3

The PHP extension for mysql is not installed/configured on your system.

Try

• Your PHP installation appears to be missing the MySQL extension which is required by WordPress to ensure the module is actually enabled

• Install on Linux Ubuntu http://www.cyberciti.biz/faq/install-mysql-php-support-for-wordpress/

• Windows PHP doesn't see mysql extension

This being said, you should use mysqli (not mysql ) extension, as mysql is deprecated, not recommended and will be out of PHP7.