sqlite_fetch_column_types

SQLiteDatabase::fetchColumnTypes

(PHP 5 < 5.4.0)

sqlite_fetch_column_types -- SQLiteDatabase::fetchColumnTypes — Return an array of column types from a particular table

说明

sqlite_fetch_column_types ( string $table_name , resource $dbhandle [, int $result_type = SQLITE_ASSOC ] ) : array

面向对象风格 (method):

public SQLiteDatabase::fetchColumnTypes ( string $table_name [, int $result_type = SQLITE_ASSOC ] ) : array

sqlite_fetch_column_types() returns an array of column data types from the specified table_name table.

参数

table_name: The table name to query.
dbhandle: The SQLite Database resource; returned from sqlite_open() when used procedurally. This parameter is not required when using the object-oriented method.
result_type: The optional result_type parameter accepts a constant and determines how the returned array will be indexed. Using SQLITE_ASSOC will return only associative indices (named fields) while SQLITE_NUM will return only numerical indices (ordinal field numbers). SQLITE_ASSOC is the default for this function.

返回值

Returns an array of column data types; FALSE on error.

由 SQLITE_ASSOC 与 SQLITE_BOTH 返回的列名会依照 sqlite.assoc_case 配置选项的值决定大小写。

更新日志

版本	说明
5.1.0	Added `result_type`

范例

Example #1 Procedural example


<?php
$db = sqlite_open('mysqlitedb');
sqlite_query($db, 'CREATE TABLE foo (bar varchar(10), arf text)');
$cols = sqlite_fetch_column_types('foo', $db, SQLITE_ASSOC);

foreach ($cols as $column => $type) {
    echo "Column: $column  Type: $type\n";
}
?>

Example #2 Object-oriented example


<?php
$db = new SQLiteDatabase('mysqlitedb');
$db->query('CREATE TABLE foo (bar varchar(10), arf text)');
$cols = $db->fetchColumnTypes('foo', SQLITE_ASSOC);

foreach ($cols as $column => $type) {
    echo "Column: $column  Type: $type\n";
}
?>

以上例程会输出：

Column: bar  Type: VARCHAR
Column: arf  Type: TEXT

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User Contributed Notes 3 notes

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Anonymous ¶

19 years ago


The problem with the permanently locked database file when using this function still seems to exist in PHP 5.0.3 (tested on win32).

However, you can get all the information you need about the fields of a table by using this query:

PRAGMA table_info(name_of_your_table);

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-1

enthusiast ¶

19 years ago


If I (OO version) try to add the contant SQLITE_ASSOC, (exactly as listed in the above example) it generates the following error:

SQLiteDatabase::fetchColumnTypes() expects exactly 1 parameter, 2 given in C:\.... 

If I remove it completely, it returns the associative array I expected.

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-1

hugo_pl at users dot sourceforge dot net ¶

20 years ago


This function, and the OO version, is bugged in PHP <= 5.0.1, locking the database until you restart the webserver.

http://bugs.php.net/bug.php?id=29476

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