PHP 5.4.31 Released

Examples

These examples connect as the HR user, which is the sample "Human Resources" schema supplied with the Oracle database. The account may need to be unlocked and the password reset before you can use it.

The examples connect to the XE database on your machine. Change the connect string to your database before running the examples.

Example #1 Basic query

This shows querying and displaying results. Statements in OCI8 use a prepare-execute-fetch sequence of steps.

<?php

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

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

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

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

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

?>

Example #2 Inserting with bind variables

Bind variables improve performance by allowing reuse of execution contexts and caches. Bind variables improve security by preventing some kinds of SQL Injection problems.

<?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'], ENT_QUOTES), 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);

?>

Example #3 Binding in the WHERE clause of a query

This shows a single scalar bind.

<?php

$conn 
oci_connect("hr""hrpwd""localhost/XE");
if (!
$conn) {
    
$m oci_error();
    
trigger_error(htmlentities($m['message']), E_USER_ERROR);
}

$sql 'SELECT last_name FROM employees WHERE department_id = :didbv ORDER BY last_name';
$stid oci_parse($conn$sql);
$didbv 60;
oci_bind_by_name($stid':didbv'$didbv);
oci_execute($stid);
while ((
$row oci_fetch_array($stidOCI_ASSOC)) != false) {
    echo 
$row['LAST_NAME'] ."<br>\n";
}

// Output is
//    Austin
//    Ernst
//    Hunold
//    Lorentz
//    Pataballa

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

?>

Example #4 Inserting and fetching a CLOB

For large data use binary long object (BLOB) or character long object (CLOB) types. This example uses CLOB.

<?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'], ENT_QUOTES), 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);
$clob oci_new_descriptor($connOCI_D_LOB);
oci_bind_by_name($stid":mykey"$mykey5);
oci_bind_by_name($stid":myclob"$clob, -1OCI_B_CLOB);
oci_execute($stidOCI_NO_AUTO_COMMIT); // use OCI_DEFAULT for PHP <= 5.3.1
$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"$mykey5);
oci_execute($stid);

print 
'<table border="1">';
while (
$row oci_fetch_array($stidOCI_ASSOC+OCI_RETURN_LOBS)) {
    print 
'<tr><td>'.$row['MYCLOB'].'</td></tr>';
    
// In a loop, freeing the large variable before the 2nd fetch reduces PHP's peak memory usage
    
unset($row);  
}
print 
'</table>';

?>

Example #5 Using a PL/SQL stored function

You must bind a variable for the return value and optionally for any PL/SQL function arguments.

<?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'], ENT_QUOTES), 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($stid':r'$r40);

oci_execute($stid);

print 
"$r\n";   // prints 24

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

?>

Example #6 Using a PL/SQL stored procedure

With stored procedures, you should bind variables for any arguments.

<?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'], ENT_QUOTES), 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($stid':p2'$p240);

oci_execute($stid);

print 
"$p2\n";   // prints 16

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

?>

Example #7 Calling a PL/SQL function that returns a REF CURSOR

Each returned value from the query is a REF CURSOR that can be fetched from.

<?php
/*
  Create the PL/SQL stored function as:

  CREATE OR REPLACE FUNCTION myfunc(p1 IN NUMBER) RETURN SYS_REFCURSOR AS
      rc SYS_REFCURSOR;
  BEGIN
      OPEN rc FOR SELECT city FROM locations WHERE ROWNUM < p1;
      RETURN rc;
  END;
*/

$conn oci_connect('hr''welcome''localhost/XE');

$stid oci_parse($conn'SELECT myfunc(5) AS mfrc FROM dual');
oci_execute($stid);

echo 
"<table border='1'>\n";
while ((
$row oci_fetch_array($stidOCI_ASSOC))) {
    echo 
"<tr>\n";
    
$rc $row['MFRC'];
    
oci_execute($rc);  // returned column value from the query is a ref cursor
    
while (($rc_row oci_fetch_array($rcOCI_ASSOC))) {   
        echo 
"    <td>" $rc_row['CITY'] . "</td>\n";
    }
    
oci_free_statement($rc);
    echo 
"</tr>\n";
}
echo 
"</table>\n";

// Output is:
//   Beijing
//   Bern
//   Bombay
//   Geneva

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

?>
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