This snippet will replace the first zero in phone numbers sent to Twilio API with a given country code.
Add the following code snippet towards the end of your child themes functions.php
add_filter( 'automator_twilio_api_call', function( $params ) { $replace_first_zero_with = '+42'; // Enter your country code here if ( empty( $params['body']['to'] ) ) { return $params; } $to_number = $params['body']['to']; if ( substr( $to_number, 0, 1 ) == "0" ) { $to_number = $replace_first_zero_with . substr( $to_number, 1 ); } $params['body']['to'] = $to_number; return $params; } );