/
pg-update.xml
179 lines (173 loc) · 5.49 KB
/
pg-update.xml
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
<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- splitted from ./en/functions/pgsql.xml, last change in rev 1.80 -->
<refentry xml:id="function.pg-update" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>pg_update</refname>
<refpurpose>
Update table
</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type class="union"><type>string</type><type>bool</type></type><methodname>pg_update</methodname>
<methodparam><type>PgSql\Connection</type><parameter>connection</parameter></methodparam>
<methodparam><type>string</type><parameter>table_name</parameter></methodparam>
<methodparam><type>array</type><parameter>values</parameter></methodparam>
<methodparam><type>array</type><parameter>conditions</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>flags</parameter><initializer><constant>PGSQL_DML_EXEC</constant></initializer></methodparam>
</methodsynopsis>
<para>
<function>pg_update</function> updates records that matches
<parameter>conditions</parameter> with <parameter>values</parameter>.
</para>
<para>
If <parameter>flags</parameter> is specified,
<function>pg_convert</function> is applied to
<parameter>values</parameter> with the specified flags.
</para>
<para>
By default <function>pg_update</function> passes raw values.
Values must be escaped or the <constant>PGSQL_DML_ESCAPE</constant> flag
must be specified in <parameter>flags</parameter>.
<constant>PGSQL_DML_ESCAPE</constant> quotes and escapes parameters/identifiers.
Therefore, table/column names become case sensitive.
</para>
<para>
Note that neither escape nor prepared query can protect LIKE query,
JSON, Array, Regex, etc. These parameters should be handled
according to their contexts. i.e. Escape/validate values.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>connection</parameter></term>
<listitem>
&pgsql.parameter.connection;
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>table_name</parameter></term>
<listitem>
<para>
Name of the table into which to update rows.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>values</parameter></term>
<listitem>
<para>
An <type>array</type> whose keys are field names in the table <parameter>table_name</parameter>,
and whose values are what matched rows are to be updated to.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>conditions</parameter></term>
<listitem>
<para>
An <type>array</type> whose keys are field names in the table <parameter>table_name</parameter>,
and whose values are the conditions that a row must meet to be updated.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>flags</parameter></term>
<listitem>
<para>
Any number of <constant>PGSQL_CONV_FORCE_NULL</constant>,
<constant>PGSQL_DML_NO_CONV</constant>,
<constant>PGSQL_DML_ESCAPE</constant>,
<constant>PGSQL_DML_EXEC</constant>,
<constant>PGSQL_DML_ASYNC</constant> or
<constant>PGSQL_DML_STRING</constant> combined. If <constant>PGSQL_DML_STRING</constant> is part of the
<parameter>flags</parameter> then query string is returned. When <constant>PGSQL_DML_NO_CONV</constant>
or <constant>PGSQL_DML_ESCAPE</constant> is set, it does not call <function>pg_convert</function> internally.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.success; Returns <type>string</type> if <constant>PGSQL_DML_STRING</constant> is passed
via <parameter>flags</parameter>.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
&pgsql.changelog.connection-object;
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>pg_update</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$db = pg_connect('dbname=foo');
$data = array('field1'=>'AA', 'field2'=>'BB');
// This is safe somewhat, since all values are escaped.
// However PostgreSQL supports JSON/Array. These are not
// safe by neither escape nor prepared query.
$res = pg_update($db, 'post_log', $_POST, $data);
if ($res) {
echo "Data is updated: $res\n";
} else {
echo "User must have sent wrong inputs\n";
}
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>pg_convert</function></member>
</simplelist>
</para>
</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:"~/.phpdoc/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
-->