Wsrtjtyk

I created a wordPress child theme but after activate the site shows 500 Error and admin page showing blank.
here is my code:

/*

Theme Name:   WP Kallyas Child Theme

Theme URI:    http://www.wpbeginner.com/

Description:  A Kallyas child theme 

Author:       Sumanta Kundu

Author URI:   https://www.upwork.com/freelancers/~01b606f18d998a5fb2

Template:     kallyas_30.3.2017

Version:      1.0.0

*/

@import url("../kallyas_30.3.2017/style.css");

And functions.php code goes here:

if(isset($_POST['submit_wp_buttons_settings'])){

save_plugin_data_meta_table();

}

 if ( isset( $_POST['btn_save_send_data_email'] ) ) {

$current_user = wp_get_current_user();

$admin_email = get_option( 'admin_email' );

$current_url="//".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];

$contact_errors = false;

    // get the posted data

    $name = $_POST["name"];

    $email_address = $_POST["email"];

    $messagee = $_POST["messagee"];

    $price = $_POST["price"];

    $txt_txt = $_POST['txt_txt'];

    // write the email content

    $header .= "MIME-Version: 1.0n";

    $header .= "Content-Type: text/html; charset=utf-8n";

    $header .= "From:" . $email_address;

    $message = "Name: $name <br/>";

    $message .= "Email Address: $email_address <br/>";

    $message .= "$txt_txt: $price <br/>";

    $message .= "Message: <br/> $messagee <br/>";

    $message .= "Product Url: <br/> $current_url";

    $subject = "$txt_txt - ww2badges";

    $subject = "=?utf-8?B?" . base64_encode($subject) . "?=";

    $to = $admin_email;

    // send the email using wp_mail()

    if( !mail($to, $subject, $message, $header) ) {

        echo '<script>alert("Failed");</script>';

        echo '<script>window.location.href="'.$current_url.'"</script>';

    } else {

        echo '<script>alert("Email has been sent to admin.");</script>';

        echo '<script>window.location.href="'.$current_url.'"</script>';

    }

 }

 if ( isset( $_POST['not_logged_in'] ) ) {

echo '<script>alert("You should login first.");</script>';

echo '<script>window.location.href="'.site_url().'/wp-login.php"</script>';

}

if ( isset( $_POST['starting_price_btn'] ) ) {

send_starting_bid_email_to_admin();

}

Please help me I am newbie in WordPress.I also added this code to my plugin but same problem.

you can use this:

/*

Theme Name: Twenty Seventeen Child

Theme URL: http://hostinger-tutorials.com

Description: Twenty Seventeen Child Theme

Author: John Doe

Author URL: http://hostinger-tutorials.com

Template: twentyseventeen

Version: 1.0.0

Text Domain: twentyseventeen-child

*/

@import url("../kallyas_30.3.2017/style.css");

then use this code in functions.php :

<?php

add_action( 'wp_enqueue_scripts', 'enqueue_parent_styles' );



function enqueue_parent_styles() {

   wp_enqueue_style( 'parent-style', get_template_directory_uri().'/style.css' );

}

you can read more from hostinger