(PHP 5, PHP 7, PHP 8, PECL OCI8 >= 1.1.0)
oci_num_fields — 返回结果列的数目
$statement
) : int
oci_num_fields() 返回
statement 中的列的数目。
Example #1 oci_num_fields() 例子
<?php
echo "<pre>\n";
$conn = oci_connect("scott", "tiger");
$stmt = oci_parse($conn, "select * from emp");
oci_execute($stmt);
while (oci_fetch($stmt)) {
echo "\n";
$ncols = oci_num_fields($stmt);
for ($i = 1; $i <= $ncols; $i++) {
$column_name = oci_field_name($stmt, $i);
$column_value = oci_result($stmt, $i);
echo $column_name . ': ' . $column_value . "\n";
}
echo "\n";
}
oci_free_statement($stmt);
oci_close($conn);
echo "</pre>";
?>
oci_num_fields() 在出错时返回 false。
Note:
在 PHP 5.0.0 之前的版本必须使用 ocinumcols() 替代本函数。该函数名仍然可用，为向下兼容作为 oci_num_fields() 的别名。不过其已被废弃，不推荐使用。
The following is not immediately obvious:
If you need the number of columns in a REF CURSOR returned from a PL/SQL procedure, you need to use OCINumColumns() on the cursor handle returned by OCINewCursor after it is bound and executed, not the statement handle. Same applies for OCIColumnName() and friends.