I am new to PHP and I purchased a theme that I need to customize the registration form. The fields are all required by default and the only way is to customize. How do I replace the "required" class with optional? Lastly, if i can also change a URL input to a file upload (csv feed and logo). Thank in advance guys
<form class="register-store">
<div class="row">
<div class="col-md-6">
<div class="input-group">
<label for="store_name"><?php esc_attr_e( 'Store Name', 'compare' ) ?> <span class="required">*</span></label>
<input type="text" class="form-control" name="store_name" id="store_name">
<p class="field-description"><?php _e( 'Input name of your store', 'compare' ) ?></p>
</div>
</div>
<div class="col-md-6">
<div class="input-group">
<label for="store_url"><?php esc_attr_e( 'Store URL', 'compare' ) ?> <span class="required">*</span></label>
<input type="text" class="form-control" name="store_url" id="store_url">
<p class="field-description"><?php _e( 'Input link to your store', 'compare' ) ?></p>
</div>
</div>
</div>
<div class="row">
<div class="col-md-6">
<div class="input-group">
<label for="store_contact_name"><?php esc_attr_e( 'Your Name', 'compare' ) ?> <span class="required">*</span></label>
<input type="text" class="form-control" name="store_contact_name" id="store_contact_name">
<p class="field-description"><?php _e( 'Input your full name', 'compare' ) ?></p>
</div>
</div>
<div class="col-md-6">
<div class="input-group">
<label for="store_contact_phone"><?php esc_attr_e( 'Your Phone', 'compare' ) ?> <span class="required">*</span></label>
<input type="text" class="form-control" name="store_contact_phone" id="store_contact_phone">
<p class="field-description"><?php _e( 'Input your phone with internation prefix', 'compare' ) ?></p>
</div>
</div>
</div>
<div class="row">
<div class="col-md-6">
<div class="input-group">
<label for="store_contact_email"><?php esc_attr_e( 'Your Email', 'compare' ) ?> <span class="required">*</span></label>
<input type="text" class="form-control" name="store_contact_email" id="store_contact_email">
<p class="field-description"><?php _e( 'Input your mail for contact', 'compare' ) ?></p>
</div>
</div>
<div class="col-md-6">
<div class="input-group">
<label for="store_package"><?php esc_attr_e( 'Chose your package', 'compare' ) ?> <span class="required">*</span>
<?php
$all_packages_link = compare_get_permalink_by_tpl( 'page-tpl_packages' );
if( $all_packages_link !== 'javascript:;' ):
?>
<a href="<?php echo esc_url( $all_packages_link ) ?>" class="pull-right"> <?php _e( 'Check list of available packages', 'compare' ) ?></a></label>
<?php endif; ?>
<select name="store_package" id="store_package" class="form-control">
<option value=""><?php _e( 'Select Package', 'compare' ) ?></option>
<?php echo compare_list_packages(); ?>
</select>
<p class="field-description"><?php _e( 'Select package for your store', 'compare' ) ?></p>
</div>
</div>
</div>
<div class="row">
<div class="col-md-6">
<div class="input-group">
<label for="store_xml_feed"><?php esc_attr_e( 'Store Feed URL', 'compare' ) ?> <span class="required">*</span></label>
<input type="text" class="form-control" name="store_xml_feed" id="store_xml_feed">
<p class="field-description"><?php _e( 'Input link to your XML / CSV products feed', 'compare' ) ?></p>
</div>
</div>
<div class="col-md-6">
<div class="input-group">
<label for="store_logo"><?php esc_attr_e( 'Store Logo URL', 'compare' ) ?> <span class="required">*</span></label>
<input type="text" class="form-control" name="store_logo" id="store_logo">
<p class="field-description"><?php _e( 'Input link to your store logo', 'compare' ) ?></p>
</div>
