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
202
203
204
205
206
207
208
209
210
211
|
<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.14 $ -->
<refentry id="function.mysqli-fetch-field-direct">
<refnamediv>
<refname>mysqli_fetch_field_direct</refname>
<refname>result->fetch_field_direct</refname>
<refpurpose>
Fetch meta-data for a single field
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>Procedural style:</para>
<methodsynopsis>
<type>object</type><methodname>mysqli_fetch_field_direct</methodname>
<methodparam><type>mysqli_result</type><parameter>result</parameter></methodparam>
<methodparam><type>int</type><parameter>fieldnr</parameter></methodparam>
</methodsynopsis>
<para>Object oriented style (method):</para>
<classsynopsis>
<ooclass><classname>mysqli_result</classname></ooclass>
<methodsynopsis>
<type>object</type><methodname>fetch_field_direct</methodname>
<methodparam><type>int</type><parameter>fieldnr</parameter></methodparam>
</methodsynopsis>
</classsynopsis>
<para>
<function>mysqli_fetch_field_direct</function> returns an object which contains
field definition informations from specified resultset. The value of fieldnr must be in the
range from <literal>0</literal> to <literal>number of fields - 1</literal>.
</para>
</refsect1>
<refsect1>
&reftitle.returnvalues;
<para>
Returns an object which contains field definition information or &false; if no field information
for specified <literal>fieldnr</literal> is available.
</para>
<para>
<table>
<title>Object attributes</title>
<tgroup cols='2'>
<thead>
<row>
<entry>Attribute</entry>
<entry>Description</entry>
</row>
</thead>
<tbody>
<row>
<entry>name</entry>
<entry>The name of the column</entry>
</row>
<row>
<entry>orgname</entry>
<entry>Original column name if an alias was specified</entry>
</row>
<row>
<entry>table</entry>
<entry>The name of the table this field belongs to (if not calculated)</entry>
</row>
<row>
<entry>orgtable</entry>
<entry>Original table name if an alias was specified</entry>
</row>
<row>
<entry>def</entry>
<entry>The default value for this field, represented as a string</entry>
</row>
<row>
<entry>max_length</entry>
<entry>The maximum width of the field for the result set.</entry>
</row>
<row>
<entry>length</entry>
<entry>The width of the field, as specified in the tabl definition.</entry>
</row>
<row>
<entry>charsetnr</entry>
<entry>The character set number for the field.</entry>
</row>
<row>
<entry>flags</entry>
<entry>An integer representing the bit-flags for the field.</entry>
</row>
<row>
<entry>type</entry>
<entry>The data type used for this field</entry>
</row>
<row>
<entry>decimals</entry>
<entry>The number of decimals used (for integer fields)</entry>
</row>
</tbody>
</tgroup>
</table>
</para>
</refsect1>
<refsect1>
&reftitle.seealso;
<para>
<function>mysqli_num_fields</function>,
<function>mysqli_fetch_field</function>&listendand;
<function>mysqli_fetch_fields</function>.
</para>
</refsect1>
<refsect1>
&reftitle.examples;
<example>
<title>Object oriented style</title>
<programlisting role="php">
<![CDATA[
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "SELECT Name, SurfaceArea from Country ORDER BY Name LIMIT 5";
if ($result = $mysqli->query($query)) {
/* Get field information for column 'SurfaceArea' */
$finfo = $result->fetch_field_direct(1);
printf("Name: %s\n", $finfo->name);
printf("Table: %s\n", $finfo->table);
printf("max. Len: %d\n", $finfo->max_length);
printf("Flags: %d\n", $finfo->flags);
printf("Type: %d\n", $finfo->type);
$result->close();
}
/* close connection */
$mysqli->close();
?>
]]>
</programlisting>
</example>
<example>
<title>Procedural style</title>
<programlisting role="php">
<![CDATA[
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "SELECT Name, SurfaceArea from Country ORDER BY Name LIMIT 5";
if ($result = mysqli_query($link, $query)) {
/* Get field information for column 'SurfaceArea' */
$finfo = mysqli_fetch_field_direct($result, 1);
printf("Name: %s\n", $finfo->name);
printf("Table: %s\n", $finfo->table);
printf("max. Len: %d\n", $finfo->max_length);
printf("Flags: %d\n", $finfo->flags);
printf("Type: %d\n", $finfo->type);
mysqli_free_result($result);
}
/* close connection */
mysqli_close($link);
?>
]]>
</programlisting>
</example>
&example.outputs;
<screen>
<![CDATA[
Name: SurfaceArea
Table: Country
max. Len: 10
Flags: 32769
Type: 4
]]>
</screen>
</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
-->
|
