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
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;
}
$flags = mysql_field_flags($result, 0);
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()