Three ways to get table field names and field information in php mysql

php mysql three methods to obtain table field names and field information

First give the information about the table used in this example:



Use desc to obtain table field information

The php code is as follows:

<?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);
  }
?>

Running results:

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] => 
)

Use SHOW FULL FIELDS to obtain table field information

The php code is as follows:

<?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);
  }
?>

Run results:

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] => 
)

Use the mysql_fetch_field method to obtain table field information

php code is as follows:

<?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);
  }
?>

The running results are as follows:

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
)

The above are three ways for php mysql to obtain table field names and field information Method content, please pay attention to the PHP Chinese website (www.php.cn) for more related content!