oci_field_size()

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

返回字段大小

说明

oci_field_size(resource $stmt, mixed $field): int

oci_field_size()以字节为单位返回字段的大小。$field参数的值可以是字段的索引（从 1 开始）或者字段名。

Example #1 oci_field_size()例子

<?php
    $conn = oci_connect("scott", "tiger");
    $stmt = oci_parse($conn, "SELECT * FROM emp");
    oci_execute($stmt);
    echo "<table border=\"1\">";
    echo "<tr>";
    echo "<th>Name</th>";
    echo "<th>Type</th>";
    echo "<th>Length</th>";
    echo "</tr>";
    $ncols = oci_num_fields($stmt);
    for ($i = 1; $i <= $ncols; $i++) {
        $column_name  = oci_field_name($stmt, $i);
        $column_type  = oci_field_type($stmt, $i);
        $column_size  = oci_field_size($stmt, $i);
        echo "<tr>";
        echo "<td>$column_name</td>";
        echo "<td>$column_type</td>";
        echo "<td>$column_size</td>";
        echo "</tr>";
    }
    echo "</table>";
    oci_free_statement($stmt);
    oci_close($conn);
?>

Note:

在 PHP 5.0.0 之前的版本必须使用ocicolumnsize()替代本函数。该函数名仍然可用，为向下兼容作为oci_field_size()的别名。不过其已被废弃，不推荐使用。

参见oci_num_fields()和oci_field_name()。

Just a note regarding the size of Oracle NUMBERS will always return 22 as their "size".
This seems to be an Oracle feature. The rest of the documentation is in bug5156.