PHP

Opcode Cache

Zend OPcache is preferred. Other opcode caches are/were:

• eAccelerator
• APC
• XCache

And they conflict with each other, so check:

php -m | grep -i -E "eaccelerator|apc|xcache|zend"

PHP handlers that can use opcache: DSO (mod_php), FCGI, PHP-FPM

PHP handlers that cannot use opcache: CGI, SuPHP

PECL & PEAR

Use PEAR to install PECL extensions for PHP, if they're not offered in the repos.

CLI how-to: https://pear.php.net/manual/en/guide.users.commandline.commands.php

PHP Examples

PHP pages need to be owned by the user, within the docroot, and accessed via browser.

Test Page

<?php 
Echo "This is only a test";
?>

Test Page that shows the server's IP

<?php 
Echo "This is only a test. <br />";
echo "This server's IP: " . $_SERVER['SERVER_ADDR']; 
?>

PHPinfo page

<?php 
// Show all information, defaults to INFO_ALL
phpinfo();
?>

Show site user's IP address

<?php 
echo $_SERVER['REMOTE_ADDR'
?>

Show date in the default time zone

<?php 
echo " " . date("j-M-Y G:i:s e");
echo " \n";   
?>

Cron test

<?php 
echo "The time is " . date("h:i:sa");
echo PHP_EOL ; 
?>

Then set up a cron job like this:

*/5 * * * * /usr/local/bin/php /home/USER/crontest/phpcron.php >> /home/USER/crontest/phpcronlog.log

List installed classes in alphabetical order

<?php 
$classes = get_declared_classes();
sort($classes);
print_r($classes);   
?>

Basic PHP mail test

<?php $to = 'lwtest2@WHATEVER.com'; $subject = 'Test e-mail using PHP'; $message = 'This is a test e-mail message'; $headers = 'From: lwtest@WHATEVER.com' . "\r\n" . 'Reply-To: lwtest@WHATEVER.com' . "\r\n" . 'X-Mailer: PHP/' . phpversion(); mail($to, $subject, $message, $headers, '-flwtest@WHATEVER.com'); ?>

PEAR Mail test with SMTP Auth & SSL

1. Make sure PEAR Mail is installed.
2. Make sure that /usr/local/lib/php (on EA3 servers) is in the include path.
3. Change the username, password, and host.

<?php

require_once "Mail.php";

$from = "LW Test <lwtest@whatever.com>";
$to = "Jim Murphy <jmurphy@liquidweb.com>";
$subject = "Advanced PHP Mail Test";
$body = "Hello,\n\nThis is a test of the PEAR mail system.\n\nThis is only a test.";

$host = "ssl://hostname";
$port = "465";
$username = "smtp_username";
$password = "smtp_password";

$headers = array ('From' => $from,
   'To' => $to,
   'Subject' => $subject);
 $smtp = Mail::factory('smtp',
   array ('host' => $host,
     'port' => $port,
     'auth' => true,
     'username' => $username,
     'password' => $password));

 $mail = $smtp->send($to, $headers, $body); 

 if (PEAR::isError($mail)) {

echo("

" . $mail->getMessage() . "

");

  } else {

echo("

Message successfully sent!

");

  }
?>