print-r.php

<?php
/**
 * Plugin Name: print__r()
 * Description: print_r() alternative
 * Version: 1.0.0
 * Author: Paul Ryley
 * Author URI: http://geminilabs.io
 */

/**
 * CSS for print__r()
 *
 * @return void
 */
function print__r_print_css()
{
	$wp_styles = wp_styles()->queue;

	if( empty( $wp_styles ) ) {
		return;
	}

	$inline_styles = '
	.print__r {
		position: relative;
		max-height: 600px;
		overflow-y: scroll;
		background: #1d1f21;
		border-radius: 3px;
		padding: 10px;
		margin: 12px 0;
	}

	.print__r pre {
		display: block;
		font: 12px/1.5 "Operator Mono", Consolas, monospace;
		color: #b5bd68; //#c5c8c6;
		text-align: left;
		text-shadow: 1px 1px 0 rgba(0,0,0,0.5);
		padding: 5px;
		margin: 0;
	}

	.print__r_group {
		position: relative;
		background: #1d1f21;
		border-radius: 3px;
		padding: 1px;
		margin: 12px 0;
	}

	.print__r_group .print__r {
		background: #282a2e;
		border-radius: 2px;
		padding: 0;
		margin: 9px;
	}

	.print__r_group .print__r:not(:last-child) {
		margin-bottom: 10px;
	}';

	wp_add_inline_style( $wp_styles[0], apply_filters( 'print__r_print_css', $inline_styles ) );
}

add_action( 'wp_enqueue_scripts', 'print__r_print_css', 99 );

/**
 * print_r() alternative
 *
 * @param mixed $value ...
 *
 * @return void
 */
if( !function_exists( 'print__r' ) ) {
	function print__r( $value )
	{
		if( !apply_filters( 'print__r', true ) ) {
			return;
		}

		if( empty( $value ) ) {
			$value = "''";
		}

		if( func_num_args() == 1 ) {
			printf( '<div class="print__r"><pre>%s</pre></div>',
				htmlspecialchars( print_r( $value, true ), ENT_QUOTES, 'UTF-8' )
			);
		}
		else {
			echo '<div class="print__r_group">';
			foreach( func_get_args() as $param ) {
				print__r( $param );
			}
			echo '</div>';
		}
	}
}