How PHP Gets the field names and details of MySQL data tables

First we need to understand the SQL statements that query MySQL database/table related information:

The code is as follows:
SHOW DATABASES//Lists the MySQL Server database.
SHOW TABLES [from db_name]//Lists database data tables.
SHOW CREATE TABLES tbl_name//Export data table structure.
SHOW table status [from db_name]//Lists data tables and table state information.
SHOW COLUMNS from Tbl_name [from db_name]//List table fields
SHOW fields from Tbl_name [from Db_name],describe tbl_name [Col_name].
SHOW full COLUMNS from tbl_name [from db_name]//list fields and details
SHOW full field from Tbl_name [from db_name]//list fields complete properties
SHOW index from Tbl_name [from db_name]//List table index.
SHOW Status//Lists the DB Server status.
SHOW VARIABLES//Lists the MySQL system environment variables.
SHOW processlist//Lists the execution commands.
SHOW GRANTS for user//List a user right

As can be seen from the SQL statements above, we can use show full columns to list fields and details, sample code:

The code is as follows:
$rescolumns = mysql_query ("SHOW full COLUMNS from". Tb_name. "") ;
while ($row = Mysql_fetch_array ($rescolumns)) {
echo ' Field name: '. $row [' field ']. ' -Data type: '. $row [' type ']. ' -Note: '. $row [' Comment '];
Echo ' <br/><br/> ';
Print_r ($row);
}

Printing results:

The code is as follows:
Array ([0] = = ID [Field] + id [1] = = char (2) [Type] = = char (2) [2] = = Utf8_general_ci [Collation] = u TF8_GENERAL_CI [3] = + no [Null] = no [4] = = pri [Key] = = pri [5] = = [Default] = [6] = [Extra] =&gt ; [7] = = select,insert,update,references [Privileges] = select,insert,update,references [8] = = [Comment] = =)

Array ([0] = title [Field] = title [1] = = char (+) [Type] + char [2] = [Collation] = = Utf8_general_ci [3] = = [Null] + yes [4] = = [Key] = [5] = = [Default] = [6] = [Extra] =& Gt [7] = = select,insert,update,references [Privileges] = select,insert,update,references [8] = = Recommended Storage: Title, name and other information [ Comment] = Recommended storage: Title, name, etc.)

Array ([0] = des [Field] = des [1] = = varchar (255) [Type] = = varchar (255) [2] = = Utf8_general_ci [Collat ION] = Utf8_general_ci [3] = = [Null] + yes [4] = [Key] = [5] = = [Default] = [6] = [Extra ] = [7] = select,insert,update,references [Privileges] = select,insert,update,references [8] = [Comment] =)

............

Additional Information:

Of course you can also list the fields in MySQL results by mysql_list_fields-. Mysql_list_fields () Gets the information for the given table name, which is the database name and table name, and returns a result pointer.

However, the Mysql_list_fields () function is obsolete. It is best to use mysql_query () to emit an SQL statement that SHOW COLUMNS from table [like ' name '] instead. For more information, refer to the PHP Help documentation: Php:mysql_list_fields-manua

How PHP Gets the field names and details of MySQL data tables