Uly.me

cloud engineer

PHP

PHP Modules

Here are some missing PHP modules on my WordPress install. 

apt install php-gd php-dom php-mbstring php-imagick php-zip

Reboot Apache after the install.

systemctl restart apache2

List Available PHP Modules

Here’s how to list the available PHP modules.

apt-cache search php- | less

To get details about a module.

apt-cache show php-curl

To install a module.

apt install php-curl

Or install all modules.

apt install php*

Restart Apache after each install.

systemctl restart apache2

Phpinfo Blank Page

Here’s how to fix when phpinfo is displaying a blank page. The install is missing this php module.

apt install php libapache2-mod-php

Restart after install.

service apache2 restart

HTTPS in CodeIgniter

If you switched to HTTPS in Apache, make sure to update CodeIgniter’s config file.

vim /var/www/applications/config/config.php

Change the base URL to https.

$config['base_url']	= 'https://yourdomain.com/ci/';

CodeIgniter 2.1.3 on PHP7

If you’re still running older versions of CodeIgniter, here are a couple of tips to make it work with PHP7.

  1. Make sure to install all PHP tools and libraries that comes with PHP7. I was missing curl.
  2. Change your database driver from mysql to mysqli (application/config/config.php).
  3. Fix the /system/core/Common.php error or as some prefer, upgrade to a newer version.

Considering v2.1.3 is very old (currently 3.1.10) , I’m surprised it works with PHP7 with just a few modifications.

Comparing Time

Here’s a neat little PHP script that compares a set date/time to the current time. The time() function sets the $now variable to the current Unix timestamp. The strtotime() function converts a date string to a Unix timestamp. The result is assigned to the $setdate variable. The two variables containing Unix timestamps are then compared. A simple if-then statement determines if the date is in the past or future.

date_default_timezone_set('America/Los_Angeles');
$setdate = strtotime("May 9, 2017 12:27PM");
$now = time();
if ( $setdate > $now ) : echo 'Future date'; else : echo 'Past date'; endif;

You may have to change the default timezone if your server is in a different timezone.