Forum und email

mysql_field_flags

(PHP 4, PHP 5, PECL mysql:1.0)

mysql_field_flags — Get the flags associated with the specified field in a result

說明

string mysql_field_flags ( resource $result , int $field_offset )

mysql_field_flags() returns the field flags of the specified field. The flags are reported as a single word per flag separated by a single space, so that you can split the returned value using explode().

參數

result

回傳類型為 resource 的結果集。該結果集從 mysql_query() 的呼叫中得到。

field_offset

數字形式的欄位偏移量。field_offset 開始於 0。如果 field_offset 不存在,系統會發出 E_WARNING 級別的警告信息。

Return值

Returns a string of flags associated with the result, or FALSE on failure.

The following flags are reported, if your version of MySQL is current enough to support them: "not_null", "primary_key", "unique_key", "multiple_key", "blob", "unsigned", "zerofill", "binary", "enum", "auto_increment" and "timestamp".

範例

Example#1 A mysql_field_flags() example

<?php
$result 
mysql_query("SELECT id,email FROM people WHERE id = '42'");
if (!
$result) {
    echo 
'Could not run query: ' mysql_error();
    exit;
}
$flags mysql_field_flags($result0);

echo 
$flags;
print_r(explode(' '$flags));
?>

上例的輸出類似於:

not_null primary_key auto_increment
Array
(
    [0] => not_null
    [1] => primary_key
    [2] => auto_increment
)

註釋

Note: 為了保證向下相容性,可以使用下面的別名,但不贊成使用它: mysql_fieldflags()