1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.8 $ -->
<refentry id="function.oci-connect">
<refnamediv>
<refname>oci_connect</refname>
<refpurpose>Establishes a connection to the Oracle server</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>resource</type><methodname>oci_connect</methodname>
<methodparam><type>string</type><parameter>username</parameter></methodparam>
<methodparam><type>string</type><parameter>password</parameter></methodparam>
<methodparam choice="opt"><type>string</type><parameter>db</parameter></methodparam>
<methodparam choice="opt"><type>string</type><parameter>charset</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>session_mode</parameter></methodparam>
</methodsynopsis>
<para>
<function>oci_connect</function> returns a connection identifier
needed for most other OCI calls. The optional third parameter
can either contain the name of the local Oracle instance or the
name of the entry in <filename>tnsnames.ora</filename> to which
you want to connect.
If the optional third parameter is not specified, PHP uses the
environment variables <constant>ORACLE_SID</constant> (Oracle
instance) or <constant>TWO_TASK</constant>
(<filename>tnsnames.ora</filename>) to determine which database
to connect to.
</para>
<para>
Parameter <parameter>session_mode</parameter> is available since version
1.1 and accepts the following values: <constant>OCI_DEFAULT</constant>,
<constant>OCI_SYSOPER</constant> and <constant>OCI_SYSDBA</constant>.
If either <constant>OCI_SYSOPER</constant> or
<constant>OCI_SYSDBA</constant> were specified,
<function>oci_connect</function> will try to establish privileged
connection using external credentials. Privileged connections are
disabled by default. To enable them you need to set <link
linkend="ini.oci8.privileged_connect">oci8.privileged_connect</link>
to On.
</para>
<note>
<simpara>
If you're using PHP with Oracle Instant Client, you can use easy connect
naming method described here:
<ulink url="&url.oracle.oic.connect;">&url.oracle.oic.connect;</ulink>.
Basically this means you can specify "//db_host[:port]/database_name"
as database name. But if you want to use the old way of naming you
<emphasis>must</emphasis> set either <constant>ORACLE_HOME</constant> or
<constant>TNS_ADMIN</constant>.
</simpara>
</note>
<note>
<simpara>
The second and subsequent calls to <function>oci_connect</function>
with the same parameters will return the connection handle returned
from the first call. This means that queries issued against one
handle are also applied to the other handles, because they are the
<emphasis>same</emphasis> handle. This behaviour is demonstrated in
Example 1 below. If you require two handles to be transactionally
isolated from each other, you should use
<function>oci_new_connect</function> instead.
</simpara>
</note>
&oci.charset;
<para>
<example>
<title><function>oci_connect</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
echo "<pre>";
$db = "";
$c1 = oci_connect("scott", "tiger", $db);
$c2 = oci_connect("scott", "tiger", $db);
function create_table($conn)
{
$stmt = oci_parse($conn, "create table scott.hallo (test varchar2(64))");
oci_execute($stmt);
echo $conn . " created table\n\n";
}
function drop_table($conn)
{
$stmt = oci_parse($conn, "drop table scott.hallo");
oci_execute($stmt);
echo $conn . " dropped table\n\n";
}
function insert_data($conn)
{
$stmt = oci_parse($conn, "insert into scott.hallo
values('$conn' || ' ' || to_char(sysdate,'DD-MON-YY HH24:MI:SS'))");
oci_execute($stmt, OCI_DEFAULT);
echo $conn . " inserted hallo\n\n";
}
function delete_data($conn)
{
$stmt = oci_parse($conn, "delete from scott.hallo");
oci_execute($stmt, OCI_DEFAULT);
echo $conn . " deleted hallo\n\n";
}
function commit($conn)
{
oci_commit($conn);
echo $conn . " committed\n\n";
}
function rollback($conn)
{
oci_rollback($conn);
echo $conn . " rollback\n\n";
}
function select_data($conn)
{
$stmt = oci_parse($conn, "select * from scott.hallo");
oci_execute($stmt, OCI_DEFAULT);
echo $conn."----selecting\n\n";
while (oci_fetch($stmt)) {
echo $conn . " [" . oci_result($stmt, "TEST") . "]\n\n";
}
echo $conn . "----done\n\n";
}
create_table($c1);
insert_data($c1); // Insert a row using c1
insert_data($c2); // Insert a row using c2
select_data($c1); // Results of both inserts are returned
select_data($c2);
rollback($c1); // Rollback using c1
select_data($c1); // Both inserts have been rolled back
select_data($c2);
insert_data($c2); // Insert a row using c2
commit($c2); // Commit using c2
select_data($c1); // Result of c2 insert is returned
delete_data($c1); // Delete all rows in table using c1
select_data($c1); // No rows returned
select_data($c2); // No rows returned
commit($c1); // Commit using c1
select_data($c1); // No rows returned
select_data($c2); // No rows returned
drop_table($c1);
echo "</pre>";
?>
]]>
</programlisting>
</example>
</para>
<para>
<function>oci_connect</function> returns &false; if an error occured.
</para>
<note>
<para>
In PHP versions before 5.0.0 you must use <function>ocilogon</function> instead.
This name still can be used, it was left as the alias of
<function>oci_connect</function> for downwards compatability.
This, however, is deprecated and not recommended.
</para>
</note>
<simpara>
See also <function>oci_pconnect</function>,
<function>oci_new_connect</function> and
<function>oci_close</function>.
</simpara>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"../../../../manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->
|
