Category Archives: PHP

This error can occur after upgrading PHP to a newer version.

Actually, the split() function is deprecated with PHP 5.3.x and must be replaced in the code with preg_split()

Done.

It was necessary recently to include short PHP tags since the site code that I transferred to another server was written with their use.
By default, they are disabled.
For example, the usual tags look like this:

<?php  code  ?>

And short ones like this:

<? code ?>

To include short ones, you need to find the short_open_tag parameter in the php.ini configuration file and specify its value in On, for example:

short_open_tag=On

php.ini is usually located in the /etc/php5/directory, if cpanel is used, in /usr/local/lib/php.ini.

You need to reboot the web server to apply the change, in Ubuntu apache2 is rebooted with the command:

sudo service apache2 restart

In PHP, comments can be of three types.

I will give an example of the first (one-line in the style of C ++):

<?php
echo "TEXT"; // Comment
?>

The second one in Unix style:

<?php
echo "TEXT"; # Comment
?>

The third multiline:

<?php
     /* Comment
        Comment
        Comment */
     echo "TEXT";
?>

I’ll give an example of redirecting to another page:

<?php
  header("Location: http://www.example.com/");
  exit;
?>

Example of redirecting in specified number of seconds:

<?php
  header('Refresh: 5; URL=http://www.example.com/');
  echo 'After 5 seconds you will be automatically redirected to another page.';
  exit;
?>

Example of Redirect in JavaScript (this may not work for everyone):

<script type="text/javascript">
  location.replace("http://www.example.com/");
</script>

Example Redirect in JavaScript after 5 seconds (this may not work for everyone):

<script type="text/javascript">
  setTimeout('location.replace("http://www.example.com/")', 5000);
</script>

An example of Redirect in HTML after 5 seconds (if you specify 0, it will redirect immediately):

<meta http-equiv="refresh" content="5; url=http://www.example.com/">

In Ubuntu 16, installing PHP with apt-get install php installs PHP version 7, so to install PHP 5.6, you can add a third-party repository.

If the system has PHP 7 installed, then you can delete all of its components like this:

sudo apt-get purge `dpkg -l | grep php| awk '{print $2}' |tr "\n" " "`

Now add a third-party source:

sudo apt-get install software-properties-common
sudo add-apt-repository ppa:ondrej/php

And install from it PHP 5.6:

sudo apt-get update
sudo apt-get install php5.6

Similarly, you can install modules, for example:

sudo apt-get install php5.6-mysql php5.6-mcrypt php5.6-mbstring php5.6-xml

To check the installed version of PHP, perform:

sudo php -v

See also my article:
Upgrading PHP Version on Ubuntu 14.04