mysql_field_table
In MySQL 4.1.x, the four TEXT types (TINYTEXT, TEXT, MEDIUMTEXT, and LONGTEXT) return 'blob" as field types, not "string".
mysql_field_type
(PHP 4, PHP 5)
mysql_field_type — Obtém o tipo do campo especificado em um resultado
Descrição
string mysql_field_type
( resource $result
, int $field_offset
)
mysql_field_type() é similar a mysql_field_name(). Os argumentos são identicos, mas ao invés é retornado o tipo do campo.
Parâmetros
- result
-
O resultado resource que esta sendo avaliado. Este resultado vem de uma chamada a mysql_query().
- field_offset
-
O indice nuérico do campo. O field_offset começa em 0. Se field_offset não existir, um erro de nível E_WARNING é emitido.
Valor Retornado
O tipo de campo retornado será um de "int", "real", "string", "blob", e outros como detalhado na » documentação do MySQL.
Exemplos
Exemplo #1 Exemplo mysql_field_type()
<?php
mysql_connect("localhost", "mysql_username", "mysql_password");
mysql_select_db("mysql");
$result = mysql_query("SELECT * FROM func");
$fields = mysql_num_fields($result);
$rows = mysql_num_rows($result);
$table = mysql_field_table($result, 0);
echo "Your '" . $table . "' table has " . $fields . " fields and " . $rows . " record(s)\n";
echo "The table has the following fields:\n";
for ($i=0; $i < $fields; $i++) {
$type = mysql_field_type($result, $i);
$name = mysql_field_name($result, $i);
$len = mysql_field_len($result, $i);
$flags = mysql_field_flags($result, $i);
echo $type . " " . $name . " " . $len . " " . $flags . "\n";
}
mysql_free_result($result);
mysql_close();
?>
O exemplo acima irá imprimir algo similar a:
Your 'func' table has 4 fields and 1 record(s) The table has the following fields: string name 64 not_null primary_key binary int ret 1 not_null string dl 128 not_null string type 9 not_null enum
Notas
Nota:
Para compatibilidade com versões anteriores, o seguinte apelido obsoleto pode ser usado: mysql_fieldtype()
Veja Também
- mysql_field_name() - Obtém o nome do campo especificado em um resultado
- mysql_field_len() - Retorna o tamanho do campo especificado
add a note
User Contributed Notes
mysql_field_type
fred at dinkler dot com
08-Feb-2007 12:52
c dot futterlieb at bluewin dot ch
10-Dec-2006 07:06
Additional to the note below:
If you're using the "SHOW FIELDS" syntax, be sure that you're adding the table name instead of the db name in the "FROM" parameter:
<?php
$result = mysql_query("SHOW FIELDS FROM table");
?>
Also possible:
<?php
$result = mysql_query("SHOW FIELDS FROM table.db");
?>
or this:
<?php
$result = mysql_query("DESCRIBE table");
?>
http://dev.mysql.com/doc/refman/5.1/en/describe.html
fusionstream at gmail dot com
17-Sep-2006 11:19
krang at krang dot org dot uk
Condensed version of what KRANG said.
To get info on the MYSQL field type, use this code
<?
$result = mysql_query("SHOW FIELDS FROM db_name");
$i = 1;
while ($row = mysql_fetch_array($result)) { //go through one field at a time
echo "Field $i: ";
print_r($row) //display all information about A field which can be accessed thru the "$row" array.
$i++;
}
?>
Will display something like:
Field 1: Array ( [Field] => SN [Type] => mediumint(8) unsigned [Null] => [Key] => PRI [Default] => [Extra] => auto_increment ) , SN, mediumint(8) unsigned
Field 2: Array ( [Field] => ENTITY_ID [Type] => varchar(20) [Null] => [Key] => [Default] => [Extra] => ) , ENTITY_ID, varchar(20)
18-Feb-2006 12:52
This function is broken in 4.4.1 (works fine in 4.3.X).
http://bugs.php.net/35536
harald at weinreichs dot de
06-Jun-2005 12:02
The note blow seems incomplete/incorrect. For php 4.3 and mysql 4.x the returned values are:
CHAR, VARCHAR, TINYTEXT, TEXT, MEDIUMTEXT, LONGTEXT, ENUM, SET: string
TINYINT, SMALLINT, MEDIUMINT, INT, INTEGER, BIGINT: int
FLOAT, DOUBLE, DECIMAL, NUMERIC: real
TIMESTAMP: timestamp
YEAR: year
DATE: date
TIME: time
DATETIME: datetime
TINYBLOB, MEDIUMBLOB, LONGBLOB, BLOB: blob
if mysql-field-type seems to return the wrong values, you may encounter an compatibility problem of mysql, php and the libraries you use. Try reinstalling php and mysql.
mariob at menta dot net
07-Nov-2003 01:21
For version 4.3.4, types returned are:
STRING, VAR_STRING: string
TINY, SHORT, LONG, LONGLONG, INT24: int
FLOAT, DOUBLE, DECIMAL: real
TIMESTAMP: timestamp
YEAR: year
DATE: date
TIME: time
DATETIME: datetime
TINY_BLOB, MEDIUM_BLOB, LONG_BLOB, BLOB: blob
NULL: null
Any other: unknown
swalif_mesa at hotmail dot com
10-Jul-2003 12:38
Hmm for the previous comment, note that SHOW FIELDS is an alias of SHOW COLUMNS. Very useful if you need to search the mysql-documentation. Here is the link anyway...
http://www.mysql.com/doc/en/SHOW_DATABASE_INFO.html
krang at krang dot org dot uk
10-Mar-2002 07:13
The field type returns what PHP classifies the data found in the field, not how it is stored in the database; use the following example to retrieve the MySQL information about the field....
$USERNAME = '';
$PASSWORD = '';
$DATABASE = '';
$TABLE_NAME = '';
mysql_connect('localhost', $USERNAME, $PASSWORD)
or die ("Could not connect");
$result = mysql_query("SHOW FIELDS FROM $DATABASE.$TABLE_NAME");
$i = 0;
while ($row = mysql_fetch_array($result)) {
echo $row['Field'] . ' ' . $row['Type'];
}