php-doc-en/reference/oci8/examples.xml

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<chapter xml:id="oci8.examples" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 &reftitle.examples;
  <para>
    Basic queries in oci8 use a prepare-execute-fetch sequence of steps.
   <example>
    <title>Basic query</title>
     <programlisting role="php">
<![CDATA[
<?php

$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
    $e = oci_error();
    trigger_error(htmlentities($e['message']), E_USER_ERROR);
}

// Prepare the statement
$stid = oci_parse($conn, 'SELECT * FROM departments');
if (!$stid) {
    $e = oci_error($conn);
    trigger_error(htmlentities($e['message']), E_USER_ERROR);
}

// Perform the logic of the query
$r = oci_execute($stid, OCI_DEFAULT);
if (!$r) {
    $e = oci_error($stid);
    trigger_error(htmlentities($e['message']), E_USER_ERROR);
}

// Fetch the results of the query
print "<table border='1'>\n";
while ($row = oci_fetch_array($stid, OCI_ASSOC+OCI_RETURN_NULLS)) {
    print "<tr>\n";
    foreach ($row as $item) {
        print "  <td>".($item != null ? htmlentities($item) : "&nbsp;")."</td>\n";
    }
    print "</tr>\n";
}
print "</table>\n";

oci_free_statement($stid);
oci_close($conn);

?>
]]>
     </programlisting>
   </example>
  </para>


  <para>
    Bind variables improve performance by allowing reuse of execution
    contexts and caches.  Bind variables improve security by
    preventing some kinds of SQL Injection problems.
   <example>
    <title>Inserting with bind variables</title>
     <programlisting role="php">
<![CDATA[
<?php

// Before running, create the table:
//   CREATE TABLE MYTABLE (mid NUMBER, myd VARCHAR2(20));

$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
    $e = oci_error();
    trigger_error(htmlentities($e['message']), E_USER_ERROR);
}

$stid = oci_parse($conn, 'INSERT INTO MYTABLE (mid, myd) VALUES(:myid, :mydata)');

$id = 60;
$data = 'Some data';

oci_bind_by_name($stid, ':myid', $id);
oci_bind_by_name($stid, ':mydata', $data);

$r = oci_execute($stid);  // executes and commits

if ($r)
    print "One row inserted";

oci_free_statement($stid);
oci_close($conn);

?>
]]>
     </programlisting>
   </example>
  </para>


  <para>
    For large data use binary long object (BLOB) or character long object (CLOB) types.
  <example>
   <title>Inserting data into a CLOB column</title>
    <programlisting role="php">
<![CDATA[
<?php

// Before running, create the table:
//     CREATE TABLE MYTABLE (mykey NUMBER, myclob CLOB);

$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
    $e = oci_error();
    trigger_error(htmlentities($e['message']), E_USER_ERROR);
}

$mykey = 12343;  // arbitrary key for this example;

$sql = "INSERT INTO mytable (mykey, myclob)
        VALUES (:mykey, EMPTY_CLOB())
        RETURNING myclob INTO :myclob";

$stid = oci_parse($conn, $sql);
$clob = oci_new_descriptor($conn, OCI_D_LOB);
oci_bind_by_name($stid, ":mykey", $mykey, 5);
oci_bind_by_name($stid, ":myclob", $clob, -1, OCI_B_CLOB);
oci_execute($stid, OCI_DEFAULT);
$clob->save("A very long string");

oci_commit($conn);

// Fetching CLOB data

$query = 'SELECT myclob FROM mytable WHERE mykey = :mykey';

$stid = oci_parse ($conn, $query);
oci_bind_by_name($stid, ":mykey", $mykey, 5);
oci_execute($stid, OCI_DEFAULT);

print '<table border="1">';
while ($row = oci_fetch_array($stid, OCI_ASSOC)) {
  $result = $row['MYCLOB']->load();
  print '<tr><td>'.$result.'</td></tr>';
}
print '</table>';

?>
]]>
   </programlisting>
  </example>
  </para>


  <para>
   You can easily access stored PL/SQL functions and procedures.
  <example>
   <title>Using a stored function </title>
    <programlisting role="php">
<![CDATA[
<?php

/*
  Before running the PHP program, create a stored function in
  SQL*Plus or SQL Developer:

  CREATE OR REPLACE FUNCTION myfunc(p IN NUMBER) RETURN NUMBER AS
  BEGIN
      RETURN p * 3;
  END;

*/

$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
    $e = oci_error();
    trigger_error(htmlentities($e['message']), E_USER_ERROR);
}

$p = 8;

$stid = oci_parse($conn, 'begin :r := myfunc(:p); end;');
oci_bind_by_name($stid, ':p', $p);
oci_bind_by_name($stid, ':r', $r, 40);

oci_execute($stid);

print "$r\n";   // prints 24

oci_free_statement($stid);
oci_close($conn);

?>
]]>
    </programlisting>
   </example>
  </para>


  <para>
  <example>
   <title>Using a stored procedure</title>
    <programlisting role="php">
<![CDATA[
<?php

/*
  Before running the PHP program, create a stored procedure in
  SQL*Plus or SQL Developer:

  CREATE OR REPLACE PROCEDURE myproc(p1 IN NUMBER, p2 OUT NUMBER) AS
  BEGIN
      p2 := p1 * 2;
  END;

*/

$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
    $e = oci_error();
    trigger_error(htmlentities($e['message']), E_USER_ERROR);
}

$p1 = 8;

$stid = oci_parse($conn, 'begin myproc(:p1, :p2); end;');
oci_bind_by_name($stid, ':p1', $p1);
oci_bind_by_name($stid, ':p2', $p2, 40);

oci_execute($stid);

print "$p2\n";   // prints 16

oci_free_statement($stid);
oci_close($conn);

?>
]]>
    </programlisting>
   </example>
  </para>
</chapter>

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