PHP 8.1.24 Released!

oci_field_is_null

(PHP 5, PHP 7, PHP 8, PECL OCI8 >= 1.1.0)

oci_field_is_null检测当前获取的行中,字段是否为 null

说明

oci_field_is_null(resource $statement, string|int $column): bool

检测 statement 的当前行中的指定 column 是否为 null

参数

statement

有效的 OCI 语句标识符。

column

字段索引(从 1 开始)或者名称。

返回值

如果 columnnull,返回 true,否则返回 false

示例

示例 #1 oci_field_name() 示例

<?php

// 创建表:
// CREATE TABLE mytab (c1 NUMBER);
// INSERT INTO mytab VALUES (1);
// INSERT INTO mytab VALUES (NULL);

$conn = oci_connect("hr", "hrpwd", "localhost/XE");
if (!
$conn) {
$m = oci_error();
trigger_error(htmlentities($m['message']), E_USER_ERROR);
}

$stid = oci_parse($conn, "SELECT * FROM mytab");
oci_execute($stid);

while ((
$row = oci_fetch_array($stid, OCI_RETURN_NULLS)) != false) {
$ncols = oci_num_fields($stid);
for (
$col = 1; $col <= $ncols; $col++) {
var_dump(oci_field_is_null($stid, $col));
}
}

// 输出:
// bool(false)
// bool(true)

oci_free_statement($stid);
oci_close($conn);

?>

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User Contributed Notes 1 note

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Raju Joseph [RajuJoseph at usa dot net]
20 years ago
<?php

// Connect to Oracle database.

// Username : Raju
// Password : Password
// Database : Database_name

$conn=OCILogon("Raju", "Password", "DATABASE_NAME");
if ( !
$conn ) {
echo
"Unable to connect: " . var_dump( OCIError() );
die();
}

// Select Data...

// DESC[RIBE] COMPANY

// CompanyID VARCHAR2(10)
// CompanyName VARCHAR2(30)
// LastUserID VARCHAR2(15)
// LastDate DATE
//


$query = "SELECT * FROM Company";

$result = OCIParse($conn, $query);
OCIExecute($result, OCI_DEFAULT);

while (
OCIFetchInto ($result, $row, OCI_ASSOC)) {

// Usage of OCIcolumnisnull()
if (OCIcolumnisnull($result, 'CompanyName')) {

print (
"<P>" . $row['CompanyID'] . "--->" . "Company Name NOT found !! " . "<P>" );
}
else {

print (
"<P>" . $row['CompanyID'] . "--->" . $row['CompanyName'] . "<P>" );
}
}

// Close connection from Oracle...

OCILogoff($conn);
?>
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