How to Use Prepared Statements with Multiple Values in WordPress?

Prepared Statements with Multiple Values in WordPress

When utilizing prepared statements in WordPress with multiple values, it's crucial to handle the values appropriately. The issue arises when values are provided as a concatenated string, leading to improper escaping of values.

The Solution

To rectify this issue, you can use the following approach:

// Create an array of the values to use in the list
$villes = array("paris", "fes", "rabat");    

// Generate the SQL statement
// The number of %s items is based on the length of the $villes array
$sql = "
  SELECT DISTINCT telecopie
  FROM `comptage_fax`
  WHERE `ville` IN(" . implode(', ', array_fill(0, count($villes), '%s')) . ")
";

// Call $wpdb->prepare passing the values of the array as separate arguments
$query = call_user_func_array(array($wpdb, 'prepare'), array_merge(array($sql), $villes));

echo $query;

Elaboration

• array_fill(): Generates an array of specified length with a given value in each element.
• implode(): Concatenates elements of an array into a string.
• call_user_func_array(): Calls a function using an array of parameters.
• array_merge(): Merges two or more arrays into one.

The above is the detailed content of How to Use Prepared Statements with Multiple Values in WordPress?. For more information, please follow other related articles on the PHP Chinese website!