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<?php
  echo "Hello World\n";
?> 

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<Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true"
           maxThreads="150" scheme="https" secure="true"
           clientAuth="false" sslProtocol="TLS" 
           keystoreFile="/path/to/keystore" 
           keystorePass="password" />

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$JAVA_HOME/bin/keytool -genkey -alias mydomain -keyalg RSA -keystore /path/to/keystore

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Enter keystore password:  
Re-enter new password: 
What is your first and last name?
  [Unknown]:  John Smith
What is the name of your organizational unit?
  [Unknown]:  John's Diner
What is the name of your organization?
  [Unknown]:  John's Diner
What is the name of your City or Locality?
  [Unknown]:  Paris

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sudo -u www-data crontab -e

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<?php
  require_once '/path/to/app/autoloader.php';
  ...
?>

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crontab -e

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*/2 * * * * php /home/user/Desktop/hw.php >> /home/user/Desktop/hw.log

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PHP Fatal error:  Cannot redeclare class application\models\ChildModel in /var/www/demo/app/models/ChildModel.php on line 49

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<?php
  ...

  public function relations() {
    return array(
      'parentModel' => array(self::BELONGS_TO, 'ParentModel', 'parent_model_id')
    );
  }

  ...