Show PHP version and if PHP is running in 32-bit or 64-bit mode in At-a-glance dashboard widget

show-php-version.php

<?php
/*
Plugin Name: Show PHP Version
Description: Shows the current PHP version in the "At a Glance" admin dashboard widget.
Version: 1.1
Requires at least: 3.8
Author: Torsten Landsiedel
Author URI: http://torstenlandsiedel.de
*/


/**
 * Add locations to the new "At a glance" dashboard widget (WP 3.8+).
 *
 * @param  array $items
 * @return array
 */
function add_to_glance( Array $items ) {

	$php_version = phpversion();
	$bit_mode = (PHP_INT_SIZE * 8);

	if ( version_compare( $php_version, '5.5', '<' ) ) {
		$color = 'red';
	}
	elseif ( version_compare( $php_version, '5.5', '=' ) || $bit_mode == 32 ) {
		$color = 'orange';
	}
	else {
		$color = 'green';
	}
 
    $items[] = sprintf(
		'<a class="showphpversion %s" href="%s">%s %s (%s-bit)</a>',
		$color,
		esc_html__( 'http://php.net/supported-versions.php', 'tl-show-php-version' ),
		esc_html__( 'PHP version:', 'tl-show-php-version' ),
		$php_version,
		$bit_mode
	);
 
    return $items;
}
 
add_filter( 'dashboard_glance_items', 'add_to_glance' );


function add_to_glance_styles() {
  echo '<style>
	#dashboard_right_now .showphpversion.green:before {
		color: green;
		content:"\f147"; /* Dashicon YES */
	}

	#dashboard_right_now .showphpversion.red:before {
		color: red;
		content: "\f158"; /* Dashicon NO */
	}

	#dashboard_right_now .showphpversion.orange:before {
		color: orange;
		content: "\f534"; /* Dashicon WARNING */
	}
  </style>';
}
add_action('admin_head', 'add_to_glance_styles');