oci_num_fields

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

oci_num_fields返回结果列的数目

说明

int oci_num_fields ( resource $statement )

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。

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User Contributed Notes 1 note

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jnield at impole dot com
17 years ago
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.
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