CodeIgniter Class Reference

CodeIgniter Class Reference
Jamshid Hashimi
Trainer, Cresco Solution
http://www.jamshidhashimi.com
jamshid@netlinks.af
@jamshidhashimi
ajamshidhashimi
Afghanistan Workforce
Development Program

Agenda
• Database Class
• Calendar Class
• Config Class
• Email Class
• File Uploading Class
• Form Validation Class

Database Class
• CodeIgniter comes with a full-featured and
very fast abstracted database class that
supports both traditional structures and
Active Record patterns. The database
functions offer clear, simple syntax.
• Usage Examples
$this->load->database();
$DB1 = $this->load->database('group_one', TRUE);
$DB2 = $this->load->database('group_two', TRUE);

Database Class
• Configuration
$active_group = 'default';
$active_record = TRUE;
$db['default']['hostname'] = 'localhost';
$db['default']['username'] = 'root';
$db['default']['password'] = '';
$db['default']['database'] = 'sakila';
$db['default']['dbdriver'] = 'mysql';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['autoinit'] = TRUE;
$db['default']['stricton'] = FALSE;

Database Class
• Standard Query
• Result
$query = $this->db->query('SELECT
name, title, email FROM my_table');
$query->result() //Object
$query->result_array() //Array

Database Class
• Testing Result
• Single Result
if ($query->num_rows() > 0)
$query = $this->db->query('SELECT name FROM
my_table LIMIT 1');
$row1 = $query->row();
$row2 = $query->row_array();
echo $row1->name;
echo $row2[‘name’];

Database Class
• Affected Rows
$sql = "INSERT INTO mytable (title, name)
VALUES (".$this->db->escape($title).", ".$this-
>db->escape($name).")";
$this->db->query($sql);
echo $this->db->affected_rows();

Database Class
• Query Helper Functions
$this->db->insert_id();
$this->db->affected_rows();
$this->db->count_all();
$this->db->platform();
$this->db->version();
$this->db->last_query();

Database Class
• Active Record – Selecting Data
• Selecting Data – LIMIT
$query = $this->db->get('mytable');
// Produces: SELECT * FROM mytable
$query = $this->db->get('mytable', 10, 20);
// Produces: SELECT * FROM mytable LIMIT 20, 10

Database Class
• Selecting Data – Result
• get_where()
$query = $this->db->get('mytable');
foreach ($query->result() as $row)
{
echo $row->title;
}
$query = $this->db->get_where('mytable',
array('id' => $id), $limit, $offset);

Database Class
• $this->db->select();
• $this->db->select_max();
• $this->db->select_min();
• $this->db->select_avg();
• $this->db->select_sum();
• $this->db->from();
• $this->db->where();
• $this->db->join();

Database Class
• $this->db->or_where();
• $this->db->where_in();
• $this->db->or_where_in();
• $this->db->where_not_in();
• $this->db->or_where_not_in();
• $this->db->like();
• $this->db->or_like();
• $this->db->not_like();
• $this->db->or_not_like();

Database Class
• $this->db->group_by();
• $this->db->distinct();
• $this->db->having();
• $this->db->or_having();
• $this->db->order_by();

Database Class
• Inserting Data
– $this->db->insert();
$data = array(
'title' => 'My title' ,
'name' => 'My Name' ,
'date' => 'My date'
);
$this->db->insert('mytable', $data);
// Produces: INSERT INTO mytable (title,
name, date) VALUES ('My title', 'My name',
'My date')

Database Class
• Inserting Data
– $this->db->insert_batch();
$data = array(
array(
'name' => 'My Name' ,
'date' => 'My date'
),
array(
'title' => 'Another title' ,
'name' => 'Another Name' ,
'date' => 'Another date'
)
);
$this->db->insert_batch('mytable', $data);

Database Class
• Updating Data
– $this->db->update();
$data = array(
'title' => $title,
'name' => $name,
'date' => $date
);
$this->db->where('id', $id);
$this->db->update('mytable', $data);

Database Class
• Updating Data
– $this->db->update_batch();
$data = array(
array(
'name' => 'My Name 2' ,
'date' => 'My date 2'
),
array(
'title' => 'Another title' ,
'name' => 'Another Name 2' ,
'date' => 'Another date 2'
)
);
$this->db->update_batch('mytable', $data,
'title');

Database Class
• Deleting Data
– $this->db->delete();
– $this->db->truncate();
• Method Chaining
$this->db->where('id', $id);
$this->db->delete('mytable');

Calendar Class
• The Calendar class enables you to dynamically
create calendars. Your calendars can be
formatted through the use of a calendar
template, allowing 100% control over every
aspect of its design. In addition, you can pass
data to your calendar cells.
echo $this->calendar->generate();
echo $this->calendar->generate(2006, 6);

Config Class
• The Config class provides a means to retrieve
configuration preferences.
$this->config->item('item name');
$this->config->set_item('item_name', 'item_value');

Email Class
• Multiple Protocols: Mail, Sendmail, and SMTP
• Multiple recipients
• CC and BCCs
• HTML or Plaintext email
• Attachments
• Word wrapping
• Priorities
• BCC Batch Mode, enabling large email lists to be
broken into small BCC batches.
• Email Debugging tools

Email Class
$this->load->library('email');
$this->email->from('your@example.com', 'Your Name');
$this->email->to('someone@example.com');
$this->email->cc('another@another-example.com');
$this->email->bcc('them@their-example.com');
$this->email->subject('Email Test');
$this->email->message('Testing the email class.');
$this->email->send();
echo $this->email->print_debugger();

Email Class
• Send email with Gmail
$this->load->library('email');
$config = Array(
'protocol' => 'smtp',
'smtp_host' => 'ssl://smtp.googlemail.com',
'smtp_port' => 465,
'smtp_user' => 'youremail@gmail.com',
'smtp_pass' => 'yourpassword',
);

Email Class
• Initialize Configuration
$config['protocol'] = 'sendmail';
$config['mailpath'] = '/usr/sbin/sendmail';
$config['charset'] = 'iso-8859-1';
$config['wordwrap'] = TRUE;
$this->email->initialize($config);

Email Class
• Attachments
$this->email->attach('/path/to/photo1.jpg');
$this->email->send();

File Upload Class
• CodeIgniter's File Uploading Class permits files
to be uploaded. You can set various
preferences, restricting the type and size of
the files.
$this->upload->do_upload();
$this->upload->display_errors();
$this->upload->data();

File Upload Class
• Initializing Configurations
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = '100';
$config['max_width'] = '1024';
$config['max_height'] = '768';
$this->load->library('upload', $config);

Form Validation Class
• CodeIgniter provides a comprehensive form
validation and data prepping class that helps
minimize the amount of code you'll write.
<?php echo validation_errors(); ?>
$this->form_validation->run()

CodeIgniter Class Reference

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