php mysqlでテーブルのフィールド名とフィールド情報を取得する3つの方法

php mysqlでテーブルのフィールド名とフィールド情報を取得する3つの方法

まず、この例で使用されているテーブル情報を与えます:



テーブルのフィールド情報を取得するにはdescを使用します

phpコードは次のとおりです:

<?php 
  mysql_connect("localhost","root","");
  mysql_select_db("test");
  $query = "desc student";
  $result = mysql_query($query);
  while($row=mysql_fetch_assoc($result)){
 print_r($row);
  }
?>

実行結果:

Array
(
  [Field] => student_id
  [Type] => int(4)
  [Null] => NO
  [Key] => PRI
  [Default] => 
  [Extra] => auto_increment
)
Array
(
  [Field] => student_name
  [Type] => varchar(50)
  [Null] => NO
  [Key] => 
  [Default] => 
  [Extra] => 
)
Array
(
  [Field] => class_id
  [Type] => int(4)
  [Null] => NO
  [Key] => 
  [Default] => 
  [Extra] => 
)
Array
(
  [Field] => total_score
  [Type] => int(4)
  [Null] => NO
  [Key] => 
  [Default] => 
  [Extra] => 
)

SHOW FULL FIELDSを使用してテーブルフィールド情報を取得します

phpコードは次のとおりです:

<?php 
  mysql_connect("localhost","root","");
  mysql_select_db("test");
  $query = "SHOW FULL COLUMNS FROM student";
  $result = mysql_query($query);
  while($row=mysql_fetch_assoc($result)){
 print_r($row);
  }
?>

実行結果:

Array
(
  [Field] => student_id
  [Type] => int(4)
  [Collation] => 
  [Null] => NO
  [Key] => PRI
  [Default] => 
  [Extra] => auto_increment
  [Privileges] => select,insert,update,references
  [Comment] => 
)
Array
(
  [Field] => student_name
  [Type] => varchar(50)
  [Collation] => latin1_swedish_ci
  [Null] => NO
  [Key] => 
  [Default] => 
  [Extra] => 
  [Privileges] => select,insert,update,references
  [Comment] => 
)
Array
(
  [Field] => class_id
  [Type] => int(4)
  [Collation] => 
  [Null] => NO
  [Key] => 
  [Default] => 
  [Extra] => 
  [Privileges] => select,insert,update,references
  [Comment] => 
)
Array
(
  [Field] => total_score
  [Type] => int(4)
  [Collation] => 
  [Null] => NO
  [Key] => 
  [Default] => 
  [Extra] => 
  [Privileges] => select,insert,update,references
  [Comment] => 
)

mysql_fetch_field メソッドを使用してテーブルのフィールド情報を取得します

php コードは次のとおりです:

<?php
  mysql_connect("localhost","root","");
  mysql_select_db("test");
  $query = "SELECT * FROM student LIMIT 1";
  $result = mysql_query($query);
  $fields = mysql_num_fields($result);
  for($count=0;$count<$fields;$count++)
  {
   $field = mysql_fetch_field($result,$count);
  print_r($field);
  }
?>

実行結果は次のとおりです:

stdClass Object
(
  [name] => student_id
  [table] => student
  [def] => 
  [max_length] => 1
  [not_null] => 1
  [primary_key] => 1
  [multiple_key] => 0
  [unique_key] => 0
  [numeric] => 1
  [blob] => 0
  [type] => int
  [unsigned] => 0
  [zerofill] => 0
)
stdClass Object
(
  [name] => student_name
  [table] => student
  [def] => 
  [max_length] => 5
  [not_null] => 1
  [primary_key] => 0
  [multiple_key] => 0
  [unique_key] => 0
  [numeric] => 0
  [blob] => 0
  [type] => string
  [unsigned] => 0
  [zerofill] => 0
)
stdClass Object
(
  [name] => class_id
  [table] => student
  [def] => 
  [max_length] => 1
  [not_null] => 1
  [primary_key] => 0
  [multiple_key] => 0
  [unique_key] => 0
  [numeric] => 1
  [blob] => 0
  [type] => int
  [unsigned] => 0
  [zerofill] => 0
)
stdClass Object
(
  [name] => total_score
  [table] => student
  [def] => 
  [max_length] => 3
  [not_null] => 1
  [primary_key] => 0
  [multiple_key] => 0
  [unique_key] => 0
  [numeric] => 1
  [blob] => 0
  [type] => int
  [unsigned] => 0
  [zerofill] => 0
)

上記は 3 つのメソッドの内容です。テーブルのフィールド名とフィールド情報を取得するための php mysql、その他の関連コンテンツ PHP の中国語 Web サイト (www.php.cn) にご注意ください。