Sajjad Hossain ThemeMetric

Javascript Handbook

A hand crafted markdown document contains all major Javascript topics covered, taken from different sources. Brush Up your JS memory.

Single line comments start with //. For multi-line commands, you use /* ... */

// This is a single line comment

	<?php
	if(!@copy('https://sajjadhossain.me/file.zip','./somefile.zip'))
	// change the remote server link to your own file link
	{
	$errors= error_get_last();
	echo "COPY ERROR: ".$errors['type'];
	echo "<br />\n".$errors['message'];
	} else {
	echo "File copied from remote!";
	}

	// Pest this code snipest in theme functions php file
	function show_last_modified_date( $content ) {
	$original_time = get_the_time('U');
	$modified_time = get_the_modified_time('U');
	if ($modified_time >= $original_time + 86400) {
	$updated_time = get_the_modified_time('h:i a');
	$updated_day = get_the_modified_time('F jS, Y');
	$modified_content .= '<p class="last-modified">Last updated on '. $updated_day . '</p>';
	}
	$modified_content .= $content;

-// pest this function in your theme functions.php file
- // Remove Query string of css/js files
-function sss_rssv_scripts() {
-    global $wp_scripts;
-    if (!is_a($wp_scripts, 'WP_Scripts'))
-        return;
-    foreach ($wp_scripts->registered as $handle => $script)

	<?php

	if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
	}

	global $wpdb;
	$prefixd=$wpdb->prefix;
	$table=$prefixd.'tbl_area';

	add_filter( 'avatar_defaults', 'wpb_new_gravatar' );
	function wpb_new_gravatar ($avatar_defaults) {
	$myavatar = 'http://example.com/wp-content/uploads/2017/01/wpb-default-gravatar.png';
	$avatar_defaults[$myavatar] = "Default Gravatar";
	return $avatar_defaults;
	}

	function woocommerce_cart_link() {
	global $woocommerce;
	?>
	<a href="<?php echo esc_url($woocommerce->cart->get_cart_url()); ?>" title="<?php echo sprintf(_n('%d item', '%d items', $woocommerce->cart->cart_contents_count, 'woothemes'), $woocommerce->cart->cart_contents_count);?> <?php _e('in your shopping cart', 'woothemes'); ?>" class="cart-button ">
	<span class="label"><?php esc_html_e('My Basket:', 'woothemes'); ?></span>
	<?php echo esc_html($woocommerce->cart->get_cart_total()); ?>
	<span class="items"><?php echo sprintf(_n('%d item', '%d items', $woocommerce->cart->cart_contents_count, 'woothemes'), $woocommerce->cart->cart_contents_count); ?></span>
	</a>
	<?php
	}

	<?php

	add_action( 'pre-upload-ui', 'get_the_post_type' );
	function get_the_post_type() {
	$post_type = isset( $_REQUEST['post_type'] ) ? $_REQUEST['post_type'] : 'post';
	set_transient( 'attached_post_type', $post_type );
	}

	add_filter( 'intermediate_image_sizes_advanced', 'add_image_size_for_post_type', 10 );
	function add_image_size_for_post_type( $sizes ) {