How to Use WordPress Prepared Statements with Multiple Values in the IN() Condition?

WordPress Prepared Statement with Multiple Values Using IN Condition

When using a prepared statement in WordPress with multiple values in the IN() condition, it's crucial to properly feed those values into the statement. The original code attempted to pass a string containing the values, but WordPress interpreted it as a single string with escaped double quotes.

To rectify this, employ the following approach:

1. Create an array of values: Convert the comma-separated string of values into an array of individual values.

$villes = array("paris", "fes", "rabat");

2. Generate the SQL statement: Construct the SQL statement with the appropriate number of placeholders (%s) for the IN() condition.

$sql = "
  SELECT DISTINCT telecopie
  FROM `comptage_fax`
  WHERE `ville` IN(" . implode(', ', array_fill(0, count($villes), '%s')) . ")
";

3. Use call_user_func_array: Call $wpdb->prepare using call_user_func_array to pass the values of the array as separate arguments. This ensures that each value is treated individually.

$query = call_user_func_array(array($wpdb, 'prepare'), array_merge(array($sql), $villes));

echo $query;

This modified code ensures that the prepared statement is correctly constructed with multiple values in the IN() condition. By using an array of values and call_user_func_array, you can avoid the issue of escaped double quotes and execute the prepared statement with the desired results.

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