ibase_gen_id

(PHP 5)

ibase_gen_id — Increments the named generator and returns its new value

说明

mixed ibase_gen_id ( string $generator [, int $increment = 1 [, resource $link_identifier = NULL ]] )

Warning

本函数还未编写文档，仅有参数列表。

返回值

Returns new generator value as integer, or as string if the value is too big.

PHP手册 - N: Increments the named generator and returns its new value

用户评论:

robert (12-Dec-2006 07:24)

EXAMPLE: You need to know the generator?s value after INSERT: Before INSERT-Statement run $nextnumber=ibase_gen_id ("GEN_NAME",1); GEN_NAME: is the generator?s name 1: means add 1 to actual value of generator $nextnumber: is variable to store generators value after incrementing In the INSERT-Statement you can use $nextnumber instead of using generator directly like in: INSERT INTO test (field1, field2) VALUES gen_id(gen_test_id, 1), 'testme');

escoric at latinmail dot com (17-Aug-2004 06:00)

$sql="INSERT INTO mitabla(campo1,campo2,..campo n) VALUES(GEN_ID(mitabla1_codigo_gen,1),'contenido 1', 'contenido 2', 'contenido n' )";

mfischer at php dot net (28-Apr-2004 12:54)

Question arose on php-dev: How does ibase_gen_id() handle 64bit values? Interbase 6/Firebird generators are always 64-bit signed integers (Firebird's BIGINT type), regardless of the platform the client is running. On 64-bit platforms, this will never require conversion as PHP's int type is 64 bits wide on those platforms. On 32-bit platforms, the generated value is converted to a string if it exceeds the limits of a 32-bit signed integer. (This behaviour is consistent with the ibase_fetch_*() functions, that will use strings to represent numerical values that cannot be represented accurately using native PHP numerical types.) [Edited by PHP/Interbase maintainer.]