(PHP 5, PHP 7, PHP 8, PECL OCI8 >= 1.1.0)
oci_define_by_name — 将 PHP 变量与查询读取的列相关联
statement有效的 OCI8 报表标识符
由 oci_parse() 创建，被 oci_execute()
或 REF CURSOR statement 标识执行。
column查询中使用的列名。
对 Oracle 中默认、不区分大小写的列名使用大写字母。对区分大小写的列名使用准确的列名大小写。
var将包含返回列的值的 PHP 变量。
type
要返回的数据类型。一般不需要。注意不会执行 Oracle 样式的数据转换。例如将会忽略 SQLT_INT，返回的数据类型仍为 SQLT_CHR。
可以选择使用 oci_new_descriptor() 来分配 LOB/ROWID/BFILE 描述符。
成功时返回 true， 或者在失败时返回 false。
示例 #1 oci_define_by_name() 示例
<?php
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
$e = oci_error();
trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}
$sql = 'SELECT location_id, city FROM locations WHERE location_id < 1200';
$stid = oci_parse($conn, $sql);
// The defines MUST be done before executing
oci_define_by_name($stid, 'LOCATION_ID', $locid);
oci_define_by_name($stid, 'CITY', $city);
oci_execute($stid);
// Each fetch populates the previously defined variables with the next row's data
while (oci_fetch($stid)) {
echo "Location id $locid is $city<br>\n";
}
// Displays:
// Location id 1000 is Roma
// Location id 1100 is Venice
oci_free_statement($stid);
oci_close($conn);
?>
示例 #2 oci_define_by_name() 带有区分大小写的列名
<?php
/*
Before running, create the table with a case sensitive column name:
CREATE TABLE mytab (id NUMBER, "MyDescription" VARCHAR2(30));
INSERT INTO mytab (id, "MyDescription") values (1, 'Iced Coffee');
COMMIT;
*/
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
$e = oci_error();
trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}
$stid = oci_parse($conn, 'SELECT * FROM mytab');
// Use uppercase for non case-sensitive column names
oci_define_by_name($stid, 'ID', $id);
// Use the exact case for case-sensitive column names
oci_define_by_name($stid, 'MyDescription', $mydesc);
oci_execute($stid);
while (oci_fetch($stid)) {
echo "id $id is $mydesc<br>\n";
}
// Displays:
// id 1 is Iced Coffee
oci_free_statement($stid);
oci_close($conn);
?>
示例 #3 oci_define_by_name() 带有 LOB 列
<?php
/*
Before running, create the table:
CREATE TABLE mytab (id NUMBER, fruit CLOB);
INSERT INTO mytab (id, fruit) values (1, 'apple');
INSERT INTO mytab (id, fruit) values (2, 'orange');
COMMIT;
*/
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
$e = oci_error();
trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}
$stid = oci_parse($conn, 'SELECT * FROM mytab');
// The defines MUST be done before executing
oci_define_by_name($stid, 'ID', $id);
oci_define_by_name($stid, 'FRUIT', $fruit); // $fruit will become a LOB descriptor
oci_execute($stid);
while (oci_fetch($stid)) {
echo $id . " is " . $fruit->load(100) . "<br>\n";
}
// Displays:
// 1 is apple
// 2 is orange
$fruit->free();
oci_free_statement($stid);
oci_close($conn);
?>
示例 #4 oci_define_by_name() 带有显式类型
<?php
/*
Before running, create the table:
CREATE TABLE mytab (id NUMBER, fruit CLOB);
INSERT INTO mytab (id, fruit) values (1, 'apple');
INSERT INTO mytab (id, fruit) values (2, 'orange');
COMMIT;
*/
$conn = oci_connect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
$e = oci_error();
trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}
$stid = oci_parse($conn, 'SELECT * FROM mytab');
// The defines MUST be done before executing
oci_define_by_name($stid, 'ID', $id);
$fruit = oci_new_descriptor($conn, OCI_D_LOB);
oci_define_by_name($stid, 'FRUIT', $fruit, OCI_D_CLOB);
oci_execute($stid);
while (oci_fetch($stid)) {
echo $id . " is " . $fruit->load(100) . "<br>\n";
}
// Displays:
// 1 is apple
// 2 is orange
$fruit->free();
oci_free_statement($stid);
oci_close($conn);
?>