无涯教程-PHP - mysqli fetch field direct函数 mysqli fetch field d

mysqli fetch field direct - 语法

mysqli_fetch_field_direct(result,fieldIndex);

它用于将输出集中的下一列作为对象返回。

Sr.No	参数 & Description
1	result 它指定mysqli_query()、mysqli_store_result()或mysqli_use_result()返回的输出集标识符
2	fieldIndex 它指定字段索引，并且应该介于0和-1之间

Sr.No

参数 & Description

result

它指定mysqli_query()、mysqli_store_result()或mysqli_use_result()返回的输出集标识符

fieldIndex

它指定字段索引，并且应该介于0和-1之间

mysqli fetch field direct - 返回值

它返回一个包含字段定义信息的对象，如果失败，则返回FALSE

mysqli fetch field direct - 示例

<?php
   $connection_mysql=mysqli_connect("localhost","user","password","db");
if (mysqli_connect_errno($connection_mysql)){
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$sql="SELECT Lastname FROM Persons";
if ( $result</span><span class="pun">=</span><span class="pln">mysqli_query</span><span class="pun">(</span><span class="pln">$ connection_mysql, $sql</span><span class="pun">)){</span><span class="pln">$ fieldinfo=mysqli_fetch_field_direct($result,1);
  </span><span class="kwd">print</span><span class="pln"> $fieldinfo</span><span class="pun">-&gt;</span><span class="pln">name</span><span class="pun">;</span><span class="pln">
  </span><span class="kwd">print</span><span class="pln"> $fieldinfo</span><span class="pun">-&gt;</span><span class="pln">table</span><span class="pun">;</span><span class="pln">
  </span><span class="kwd">print</span><span class="pln"> $fieldinfo</span><span class="pun">-&gt;</span><span class="pln">max_length</span><span class="pun">;</span><span class="pln">
  
  mysqli_free_result</span><span class="pun">(</span><span class="pln">$result</span><span class="pun">);</span><span class="pln">

}
mysqli_close($connection_mysql);
?>

无涯教程-PHP - mysqli fetch field direct函数

mysqli fetch field direct - 语法

mysqli fetch field direct - 返回值

mysqli fetch field direct - 示例

参考链接