mysql_field_table
This function is broken in 4.4.1 (works fine in 4.3.X).
http://bugs.php.net/35536
mysql_field_type
(PHP 4, PHP 5)
mysql_field_type — Ottiene il tipo del campo specificato in un risultato
Descrizione
string mysql_field_type
( resource
$risultato
, int $indice_campo
)mysql_field_type() è simile alla funzione mysql_field_name(). Gli argomenti sono identici, ma viene restituito il tipo del campo. Il tipo del campo sarà uno dei seguenti: "int", "real", "string", "blob" ed altri come dettagliati nella » Documentazione di MySQL.
Example #1 Tipi di campo MySQL
<?php
mysql_connect("localhost", "utente_mysql", "password_mysql");
mysql_select_db("mysql");
$risultato = mysql_query("SELECT * FROM func");
$campi = mysql_num_fields($risultato);
$righe = mysql_num_rows($risultato);
$tabella = mysql_field_table($risultato, 0);
echo "La tabella'".$table."' ha ".$fields." campi e ".$righe." record\n";
echo "La tabella ha i seguenti campi:\n";
for ($i=0; $i < $campi; $i++) {
$tipo = mysql_field_type($risultato, $i);
$nome = mysql_field_name($risultato, $i);
$lung = mysql_field_len($risultato, $i);
$flag = mysql_field_flags($risultato, $i);
echo $tipo." ".$nome." ".$lung." ".$flag."\n";
}
mysql_free_result($risultato);
mysql_close();
?>
L'esempio riportato sopra dovrebbe produrre il seguente output:
La tabella 'func' ha 4 campi e 1 record La tabella ha i seguenti campi: string name 64 not_null primary_key binary int ret 1 not_null string dl 128 not_null string type 9 not_null enum
Per motivi di compatibilità con il passato, anche mysql_fieldtype() può essere usata. Questo comunque è sconsigliato.
add a note
User Contributed Notes
mysql_field_type - [8 notes]
Anonymous ¶
7 years ago
fred at dinkler dot com ¶
6 years ago
In MySQL 4.1.x, the four TEXT types (TINYTEXT, TEXT, MEDIUMTEXT, and LONGTEXT) return 'blob" as field types, not "string".
c dot futterlieb at bluewin dot ch ¶
6 years ago
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 ¶
6 years ago
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)
mariob at menta dot net ¶
9 years ago
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 ¶
9 years ago
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 ¶
11 years ago
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'];
}
harald at weinreichs dot de ¶
7 years ago
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.