bulk-update-source-url.php

<?php
/**
 * This function is for Gravity Forms and can be used to bulk update the source url of all entries of a form
 *
 * @author Johan d'Hollander
 * @link https://geekontheroad.com
 **/

function update_form_entries_source_url( $form_id, $source_url ) {
    // Get all entries for the given form ID
    $search_criteria = array('status' => 'active');
	  $paging = array( 'offset' => 0, 'page_size' => 200 );
    $entries = GFAPI::get_entries( $form_id, $search_criteria, null, $paging );

    if ( is_wp_error( $entries ) ) {
        error_log( 'Error fetching entries: ' . $entries->get_error_message() );
        return false;
    }

    foreach ( $entries as $entry ) {		
        $escaped_url         = json_encode( $source_url );
        $escaped_url         = trim( $escaped_url, '"' );        
        $entry['source_url'] = $escaped_url;

        // Save the updated entry
        $result = GFAPI::update_entry( $entry );

        if ( is_wp_error( $result ) ) {
            error_log( 'Error updating entry ID ' . $entry['id'] . ': ' . $result->get_error_message() );
        }
    }

    return true;
}