Useful debug function for developer

Debug help function in Core Php's function

<?php
/**
 * Create `help-vl.php`  in php location and add below code in that file.
 * Search `auto_prepend_file` in `php.ini`
 * Replace it with file location `auto_prepend_file ="your-location\php\help-vl.php"`
 *
 *
 */
if ( ! function_exists( 'vl' ) ) :
    /**
     * Replacement for print_r & var_dump.
     *
     * @param mixed $var
     * @param bool $dump. (default: false)
     */
    function vl( $var, $dump = 0 ) {
        ?>

        <style type="text/css">
            div#adminmenuback {
				display: none;
			}
            .vl_pre {
                text-align: left;
                margin: 30px 15px;
                padding: 1em;
                border: 0px;
                outline: 0px;
                font-size: 14px;
                font-family: monospace;
                vertical-align: baseline;
                max-width: 100%;
                overflow: auto;
                color: rgb(248,248,242);
                direction: ltr;
                word-spacing: normal;
                line-height: 1.5;
                border-radius: 0.3em;
                word-wrap: normal;
                letter-spacing: 0.266667px;
                background: rgb(61,69,75);
            }
        </style>

        <?php
        
        echo "<pre class='vl_pre'><xmp>";
        if ( true == $dump ) {
            var_dump( $var );
        } else {
            if ( is_array( $var ) || is_object( $var ) ) {
                print_r( $var );
            } else {
                echo $var;
            }
        }
        echo "</xmp></pre>";
    }
endif;