user-gender.php

/* How to add additional field in user profile add-edit in wordpress start */
add_action( 'show_user_profile', 'custom_user_fields' );
add_action( 'edit_user_profile', 'custom_user_fields' );
add_action( "user_new_form", "custom_user_fields" );
function custom_user_fields( $user ) 
{
	$user_fb_link = get_the_author_meta( 'user_fb_link', $user->ID);
	$user_gender = get_the_author_meta( 'user_gender', $user->ID);
?>
	<h3><?php _e("Custom User information", "blank"); ?></h3>
	<table class="form-table">
    <tr>
        <th>
            <label for="user_gender"><?php _e("Gender"); ?></label>
        </th>
        <td>
            <select name="user_gender" id="user_gender" style="width:180px">
            	<option value="">-Select Gender-</option>
                <option value="male"   <?php selected( $user_gender, "male"); ?>>Male</option>
                <option value="female" <?php selected( $user_gender, "female"); ?>>Female</option>
            </select>
        </td>
    </tr>
    <tr>
        <th>
            <label for="user_fb_link"><?php _e("Enter Your Fb Link"); ?></label>
        </th>
        <td>
            <input type="text" name="user_fb_link" id="user_fb_link" size="60" value="<?php echo $user_fb_link;?>" />
        </td>
    </tr>

</table>
<?php 
}

add_action( 'personal_options_update', 'save_custom_user_fields' );
add_action( 'edit_user_profile_update', 'save_custom_user_fields' );
add_action( 'user_register', 'save_custom_user_fields' );

function save_custom_user_fields( $user_id ) 
{
	if ( !current_user_can( 'edit_user', $user_id ) ) { return false; }
	update_user_meta( $user_id, 'user_gender', $_POST['user_gender'] );
	update_user_meta( $user_id, 'user_fb_link', $_POST['user_fb_link'] );
}
/* How to add additional field in user profile add-edit in wordpress End */