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oci_define_by_name
Associates a PHP variable with a column for query fetches
Description
bool oci_define_by_name
( resource $statement
, string $column_name
, mixed &$variable
[, int $type = SQLT_CHR
] )
The oci_define_by_name call must occur before
executing oci_execute.
Parameters
-
statement
-
A valid OCI8 statement
identifier created by oci_parse and executed
by oci_execute, or a REF
CURSOR statement identifier.
-
column_name
-
The column name used in the query.
Use uppercase for Oracle's default, non-case sensitive column
names. Use the exact column name case for case-sensitive
column names.
-
variable
-
The PHP variable that will contain the returned column value.
-
type
-
The data type to be returned. Generally not needed. Note that
Oracle-style data conversions are not performed. For example,
SQLT_INT will be ignored and the returned
data type will still be SQLT_CHR.
You can optionally use oci_new_descriptor
to allocate LOB/ROWID/BFILE descriptors.
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example #1 oci_define_by_name example
<?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);
?>
Example #2 oci_define_by_name with case sensitive column names
<?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);
?>
Example #3 oci_define_by_name with LOB columns
<?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);
?>
Example #4 oci_define_by_name with an explicit type
<?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);
?>
See Also
- oci_fetch
- oci_new_descriptor
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