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<code>
<html>
<head>
<link rel="stylesheet" type="text/css" 
  href="bootstrap/dist/css/bootstrap.min.css">
</head>
<h2>Employees</h2>

<?php 
require_once('Util.php');
if (empty($_GET)) { 
?>

<form class="form-horizontal" role="form" action='employees_table.php' 
  method='get'>
  <div class="form-group">
    <label for="last_name" class="col-sm-offset-2 control-label">Last Name</label>
    <input type="text" name="last_name"/><br>
	<label for="first_name" class="col-sm-offset-2  control-label">First Name</label>
    <input type="text" name="first_name"/><br>
  </div>  
  <div class="col-sm-offset-2 col-sm-10">
    <input type="submit" value="Suchen" class="btn"/> 
  </div>
</form>

<?php
} else {
  $last_name =  $_GET['last_name']; 
  $first_name =  $_GET['first_name']; 
  $db = oci_connect('hr', 'hr', 'kurs2.wifi');

  $sql = "select first_name,
            last_name,
	        salary,
			email,
			hire_date
	   from employees where ";

  if (!empty($last_name)) {
      $sql .= " last_name = :b_last_name and";
  }
  if (!empty($first_name)) {
      $sql .= " first_name = :b_first_name and";	 	 
  }
  $sql .= ' 1=1';
  
  $q = oci_parse($db, $sql);

  if (!empty($last_name)) {
    oci_bind_by_name($q, ":b_last_name",  $last_name );		  
  }
  if (!empty($first_name)) {
    oci_bind_by_name($q, ":b_first_name",  $first_name );		  
  }
  

  $r = oci_execute($q, OCI_DEFAULT);

  $table = array();  
  while ($row = oci_fetch_array($q, OCI_NUM)) { 
    $table[] = $row;	
  }   
  
  $headers = array('First Name', 'Last Name', 'Salary', 
           'Email', 'Hire Date');
  print_table($table, $headers);    
}

?>  
</html>

</code>
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